{"id":6319,"date":"2026-08-23T18:34:33","date_gmt":"2026-08-23T18:34:33","guid":{"rendered":"https:\/\/bbpmfg.com\/?p=6319"},"modified":"2026-08-24T04:03:24","modified_gmt":"2026-08-24T04:03:24","slug":"kw-to-hp","status":"publish","type":"post","link":"https:\/\/bbpmfg.com\/ar\/blog\/kw-to-hp\/","title":{"rendered":"\u0643\u064a\u0644\u0648\u0648\u0627\u0637 \u0625\u0644\u0649 \u062d\u0627\u0633\u0628\u0629 HP: \u062a\u062d\u0648\u064a\u0644 \u0643\u064a\u0644\u0648\u0648\u0627\u062a \u0625\u0644\u0649 \u0642\u0648\u0629 \u062d\u0635\u0627\u0646\u064a\u0629"},"content":{"rendered":"<p><strong>To convert kW to hp, multiply kilowatts by 1.34102209 for mechanical horsepower.<\/strong> For example, a 7.5 kW rating is 10.0577 mechanical hp. The arithmetic is exact enough for documentation, but it does not by itself select a motor or prove that two nameplates are interchangeable.<\/p>\n<p>A kW to hp calculator is a bidirectional unit converter that expresses the same power value in kilowatts or a specified horsepower convention.<\/p>\n<div id=\"calc-slot-kilowatt-mechanical-horsepower-primary\" data-calc-slot=\"kilowatt-mechanical-horsepower-primary\"><\/div><!-- ecc-calc:begin tool=\"kilowatt-mechanical-horsepower-primary\" sha256=\"1923497b61a2320c869bf1e317c3339a3436a56e4cf772499044a72cf8625d35\" -->\n\n<style data-calc-scope=\"kilowatt-mechanical-horsepower-primary\">#calc-kilowatt-mechanical-horsepower-primary{margin:26px 0;padding:18px;border:1px solid #c9d4de;border-radius:10px;background:#f8fbfd;color:#17324a;font-family:inherit}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__title{display:block;margin:0 0 6px;font-size:1.08rem;font-weight:700}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__intro{margin:0 0 14px;font-size:.92rem;line-height:1.5;color:#42566a}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__grid{display:grid;gap:12px;grid-template-columns:minmax(0,1fr)}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__field{display:grid;gap:5px}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__label{font-size:.82rem;font-weight:700;color:#42566a}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__value,#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__unit,#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__swap{min-height:42px;border:1px solid #aebdca;border-radius:6px;background:#fff;color:#17324a;font:inherit}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__value,#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__unit{padding:8px 10px}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__swap{padding:8px 12px;cursor:pointer;font-weight:700}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__swap:focus,#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__value:focus,#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__unit:focus{outline:2px solid #1d6f9b;outline-offset:2px}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__panel{margin-top:16px;padding:12px;border-left:4px solid #1d6f9b;background:#eef6fa}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__panel-label{display:block;font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:#42566a}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__out{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px;margin-top:4px}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__result{font-size:1.3rem;font-weight:700;font-variant-numeric:tabular-nums}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__symbol{font-size:1rem;font-weight:700;color:#42566a}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__restate{margin:6px 0 0;font-size:.84rem;color:#42566a}#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__note{margin:10px 0 0;font-size:.82rem;line-height:1.5;color:#42566a}@media (min-width:720px){#calc-kilowatt-mechanical-horsepower-primary .ecc-calc__grid{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr) auto minmax(0,1fr);align-items:end}}<\/style>\n<section id=\"calc-kilowatt-mechanical-horsepower-primary\" class=\"ecc-calc\" data-calc-tool=\"kilowatt-mechanical-horsepower-primary\" data-calc-quantity=\"power\" data-calc-model=\"linear\" data-calc-decimals=\"4\">\n<p class=\"ecc-calc__title\">Kilowatt to mechanical horsepower converter<\/p>\n<p class=\"ecc-calc__intro\">Convert between kilowatt and mechanical horsepower. The unit changes; the measured quantity does not.<\/p>\n<div class=\"ecc-calc__grid\">\n<label class=\"ecc-calc__field\" for=\"calc-kilowatt-mechanical-horsepower-primary-value\"><span class=\"ecc-calc__label\">Value<\/span><input id=\"calc-kilowatt-mechanical-horsepower-primary-value\" class=\"ecc-calc__value\" type=\"text\" inputmode=\"decimal\" maxlength=\"64\" value=\"1\" placeholder=\"Enter a value\" aria-label=\"Value to convert\"><\/label>\n<label class=\"ecc-calc__field\" for=\"calc-kilowatt-mechanical-horsepower-primary-from\"><span class=\"ecc-calc__label\">From<\/span><select id=\"calc-kilowatt-mechanical-horsepower-primary-from\" class=\"ecc-calc__unit\" aria-label=\"Convert from unit\"><option value=\"kilowatt\" selected>kW \u00b7 kilowatt<\/option><option value=\"mechanical_horsepower\">hp \u00b7 mechanical horsepower<\/option><\/select><\/label>\n<button id=\"calc-kilowatt-mechanical-horsepower-primary-swap\" class=\"ecc-calc__swap\" type=\"button\" aria-label=\"Swap the two units\" title=\"Swap the two units\">Swap<\/button>\n<label class=\"ecc-calc__field\" for=\"calc-kilowatt-mechanical-horsepower-primary-to\"><span class=\"ecc-calc__label\">To<\/span><select id=\"calc-kilowatt-mechanical-horsepower-primary-to\" class=\"ecc-calc__unit\" aria-label=\"Convert to unit\"><option value=\"kilowatt\">kW \u00b7 kilowatt<\/option><option value=\"mechanical_horsepower\" selected>hp \u00b7 mechanical horsepower<\/option><\/select><\/label>\n<\/div>\n<div class=\"ecc-calc__panel\">\n<span class=\"ecc-calc__panel-label\">Result<\/span>\n<div class=\"ecc-calc__out\"><output id=\"calc-kilowatt-mechanical-horsepower-primary-result\" class=\"ecc-calc__result\" aria-live=\"polite\">1.341<\/output><span id=\"calc-kilowatt-mechanical-horsepower-primary-unit\" class=\"ecc-calc__symbol\">hp<\/span><\/div>\n<p id=\"calc-kilowatt-mechanical-horsepower-primary-restate\" class=\"ecc-calc__restate\">1 kW = 1.341 hp<\/p>\n<\/div>\n<p id=\"calc-kilowatt-mechanical-horsepower-primary-note\" class=\"ecc-calc__note\">The same motor rated 10 hp and 10 PS differs by about 1.4%. Align the convention before comparing nameplates across markets.<\/p>\n<\/section>\n<script data-tool-core=\"1\" data-no-optimize=\"1\" data-cfasync=\"false\">(()=>{'use strict';const FACTORS={\"quantity\":\"power\",\"model\":\"linear\",\"domain\":\"signed\",\"units\":{\"kilowatt\":{\"to_base\":1000,\"label\":\"\u5343\u74e6\",\"label_en\":\"kilowatt\",\"symbol\":\"kW\"},\"mechanical_horsepower\":{\"to_base\":745.6998715822702,\"label\":\"\u673a\u68b0\u9a6c\u529b\uff08\u82f1\u5236\uff09\",\"label_en\":\"mechanical horsepower\",\"symbol\":\"hp\"}}};const MAX_ABS_INPUT=1000000000000000.0;const DEFAULT_DECIMALS=4;const SIG_FALLBACK=6;const NUMERIC_RE=\/^[+-]?(?:\\d+(?:\\.\\d*)?|\\.\\d+)$\/;const GROUPED_RE=\/^[+-]?\\d{1,3}(?: \\d{3})+(?:\\.\\d*)?$\/;const own=(o,k)=>Object.prototype.hasOwnProperty.call(o,k);function parseInput(raw){if(raw===null||raw===undefined)return null;if(typeof raw==='number'){return (Number.isFinite(raw)?Math.abs(raw)<=MAX_ABS_INPUT:false)?raw:null;}if(typeof raw!=='string')return null;var text=raw.replace(\/[\\u00a0\\u202f\\u2009]\/g,'').trim();if(text.indexOf(' ')!==-1){if(!GROUPED_RE.test(text))return null;text=text.split(' ').join('');}if(text===''||!NUMERIC_RE.test(text))return null;var value=Number(text);if(!Number.isFinite(value)||Math.abs(value)>MAX_ABS_INPUT)return null;return value;}function convert(value,fromUnit,toUnit){if(typeof value!=='number'||!Number.isFinite(value))return null;var units=FACTORS.units;var f=own(units,fromUnit)?units[fromUnit]:null;var t=own(units,toUnit)?units[toUnit]:null;if(!f||!t)return null;var result;if(FACTORS.model==='affine'){var base=value*f.to_base_scale+f.to_base_offset;result=(base-t.to_base_offset)\/t.to_base_scale;}else{result=value*f.to_base\/t.to_base;}if(!Number.isFinite(result))return null;return result;}function trimZeros(text){if(text.indexOf('.')===-1)return text;text=text.replace(\/0+$\/,'').replace(\/\\.$\/,'');return (text===''||text==='-'||text==='-0')?'0':text;}function formatResult(value,decimals){if(value===null||value===undefined||typeof value!=='number')return '';if(!Number.isFinite(value))return '';var d=decimals;if(typeof d!=='number'||!Number.isFinite(d)||Math.floor(d)!==d||d<0||d>10){d=DEFAULT_DECIMALS;}if(value!==0?Math.abs(value)<Math.pow(10,-d):false){var precise=value.toPrecision(SIG_FALLBACK);return precise.indexOf('e')===-1?trimZeros(precise):precise;}if(Math.abs(value)>=1e21)return String(value);return trimZeros(value.toFixed(d));}globalThis.__TOOL_CORE__={parseInput:parseInput,convert:convert,formatResult:formatResult,FACTORS:FACTORS};})();<\/script>\n<script data-tool-binding=\"1\" data-no-optimize=\"1\" data-cfasync=\"false\">(()=>{'use strict';const CORE=globalThis.__TOOL_CORE__;const root=document.getElementById('calc-kilowatt-mechanical-horsepower-primary');if(!root||!CORE)return;const pick=(suffix)=>document.getElementById('calc-kilowatt-mechanical-horsepower-primary-'+suffix);const valueEl=pick('value'),fromEl=pick('from'),toEl=pick('to');const swapEl=pick('swap'),resultEl=pick('result'),unitEl=pick('unit'),restateEl=pick('restate');if(!valueEl||!fromEl||!toEl||!resultEl)return;const declared=parseInt(root.getAttribute('data-calc-decimals'),10);const DECIMALS=Number.isFinite(declared)?declared:4;const symbolOf=(id)=>{const u=CORE.FACTORS.units[id];return (u?u.symbol:'')||id;};const DOMAIN=(CORE.FACTORS?CORE.FACTORS.domain:null)||'signed';const inDomain=(v)=>v===null||DOMAIN!=='non_negative'||v>=0;const render=()=>{const parsed=CORE.parseInput(valueEl.value);const ok=inDomain(parsed);const out=ok?CORE.convert(parsed,fromEl.value,toEl.value):null;const text=CORE.formatResult(out,DECIMALS);resultEl.textContent=text===''?'\u2014':text;if(unitEl)unitEl.textContent=symbolOf(toEl.value);if(restateEl)restateEl.textContent=!ok?\"Enter 0 or more \u2014 a negative value is not a valid reading for this quantity.\":(text===''?'':(CORE.formatResult(parsed,DECIMALS)+' '+symbolOf(fromEl.value)+' = '+text+' '+symbolOf(toEl.value)));};valueEl.addEventListener('input',render);fromEl.addEventListener('change',render);toEl.addEventListener('change',render);if(swapEl)swapEl.addEventListener('click',()=>{const held=fromEl.value;fromEl.value=toEl.value;toEl.value=held;render();});render();})();<\/script>\n\n<!-- ecc-calc:end tool=\"kilowatt-mechanical-horsepower-primary\" -->\n<div style=\"margin:24px 0; padding:20px 24px; background:#f5f5f5; border:1px solid #e0e0e0; border-top:3px solid #2d2d2d;\"><h3 style=\"margin:0 0 16px;\">Quick Specs<\/h3><table style=\"width:100%; border-collapse:collapse;\"><tbody><tr style=\"border-bottom:1px solid #e0e0e0;\"><td style=\"padding:8px 12px; font-weight:600; width:40%; color:#6b7280;\">Primary convention<\/td><td style=\"padding:8px 12px;\">Mechanical horsepower, based on 550 ft\u00b7lbf\/s<\/td><\/tr><tr style=\"border-bottom:1px solid #e0e0e0;\"><td style=\"padding:8px 12px; font-weight:600; color:#6b7280;\">kW to mechanical hp<\/td><td style=\"padding:8px 12px;\">hp = kW \u00d7 1.34102209<\/td><\/tr><tr style=\"border-bottom:1px solid #e0e0e0;\"><td style=\"padding:8px 12px; font-weight:600; color:#6b7280;\">Mechanical hp to kW<\/td><td style=\"padding:8px 12px;\">kW = hp \u00d7 0.745699872<\/td><\/tr><tr style=\"border-bottom:1px solid #e0e0e0;\"><td style=\"padding:8px 12px; font-weight:600; color:#6b7280;\">Metric horsepower<\/td><td style=\"padding:8px 12px;\">1 PS = 0.7354988 kW<\/td><\/tr><tr><td style=\"padding:8px 12px; font-weight:600; color:#6b7280;\">Selection warning<\/td><td style=\"padding:8px 12px;\">Converted rating is not a pump motor selection<\/td><\/tr><\/tbody><\/table><\/div>\n\n<h2>How Does the kW to HP Calculator Work?<\/h2>\n<figure style=\"margin:28px 0; text-align:center;\"><img decoding=\"async\" src=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_01.png\" alt=\"How Does the kW to HP Calculator Work? \u2014 BBP\" class=\"wp-image-6310\" width=\"1200\" height=\"800\" loading=\"lazy\" style=\"max-width:100%; height:auto; border-radius:8px;\" srcset=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_01.png 1200w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_01-300x200.png 300w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_01-1024x683.png 1024w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_01-768x512.png 768w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_01-18x12.png 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<p>The kW to HP calculator converts between kilowatts and mechanical horsepower in either direction. It uses the registry-backed mechanical definition, not metric PS, electric hp, boiler hp, or water hp. Enter a number, choose the input and output units, and use the displayed result for comparison or documentation.<\/p>\n<p>The output stays on the mechanical definition because every result derives from the <a href=\"https:\/\/www.nist.gov\/pml\/special-publication-811\/nist-guide-si-appendix-b-conversion-factors\/nist-guide-si-appendix-b9\" target=\"_blank\" rel=\"noopener\">NIST watt relationship<\/a> shown below. That boundary prevents a correct calculation from being attached to the wrong horsepower label.<\/p>\n<p>A simple default test vector makes the behavior visible: 1 kW returns 1.341 mechanical hp, while 1 mechanical hp returns 0.7457 kW at the component\u2019s display precision. The calculator accepts decimals, rejects invalid text, and preserves the same factor in both directions. You can still reproduce every result manually with the formulas below.<\/p>\n<p>Use more displayed digits when reconciling specifications; use a sensible rounded value when talking about a standard motor rating. A calculated 10.0577 hp equivalent does not create a new 10.0577 hp motor class. It tells you what 7.5 kW means in the selected horsepower convention.<\/p>\n\n<h2>What Formula Converts kW to Mechanical Horsepower?<\/h2>\n<figure style=\"margin:28px 0; text-align:center;\"><img decoding=\"async\" src=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_02.png\" alt=\"What Formula Converts kW to Mechanical Horsepower? \u2014 BBP\" class=\"wp-image-6311\" width=\"1200\" height=\"800\" loading=\"lazy\" style=\"max-width:100%; height:auto; border-radius:8px;\" srcset=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_02.png 1200w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_02-300x200.png 300w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_02-1024x683.png 1024w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_02-768x512.png 768w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_02-18x12.png 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<p>Multiply kilowatts by 1.34102209 to obtain mechanical horsepower. For the reverse direction, multiply mechanical horsepower by 0.745699872 to obtain kilowatts. Those operations describe exactly the same power in two units; they do not apply motor efficiency or estimate electrical input.<\/p>\n<!-- [WEBSEARCH: https:\/\/www.nist.gov\/pml\/special-publication-811\/nist-guide-si-appendix-b-conversion-factors\/nist-guide-si-appendix-b9] -->\n<div class=\"ecc-stat-strip\" style=\"display:flex;flex-wrap:wrap;gap:14px;margin:30px 0;\"><div class=\"ecc-stat\" style=\"flex:1;min-width:150px;padding:18px 20px;background:#f5f5f5;border:1px solid #e0e0e0;\"><span class=\"ecc-stat-num\" style=\"display:block;font-size:1.5rem;font-weight:700;\">1.34102209<\/span><span class=\"ecc-stat-label\" style=\"display:block;font-size:.85rem;color:#6b7280;\">mechanical hp per kW<\/span><\/div><div class=\"ecc-stat\" style=\"flex:1;min-width:150px;padding:18px 20px;background:#f5f5f5;border:1px solid #e0e0e0;\"><span class=\"ecc-stat-num\" style=\"display:block;font-size:1.5rem;font-weight:700;\">745.6999 W<\/span><span class=\"ecc-stat-label\" style=\"display:block;font-size:.85rem;color:#6b7280;\">per mechanical hp<\/span><\/div><div class=\"ecc-stat\" style=\"flex:1;min-width:150px;padding:18px 20px;background:#f5f5f5;border:1px solid #e0e0e0;\"><span class=\"ecc-stat-num\" style=\"display:block;font-size:1.5rem;font-weight:700;\">1.387%<\/span><span class=\"ecc-stat-label\" style=\"display:block;font-size:.85rem;color:#6b7280;\">metric result above mechanical<\/span><\/div><\/div>\n<p>Start with the watt definitions to reproduce the factor. One kilowatt is 1,000 watts. The <a href=\"https:\/\/www.nist.gov\/pml\/special-publication-811\/nist-guide-si-appendix-b-conversion-factors\/nist-guide-si-appendix-b9\" target=\"_blank\" rel=\"noopener\">NIST power conversion table<\/a> gives mechanical horsepower as 745.6999 watts at its published precision. Dividing 1,000 by the fuller definition value produces 1.34102209.<\/p>\n<p><strong>Example:<\/strong> 7.5 kW \u00d7 1.34102209 = 10.0576657 hp, which displays as 10.0577 hp to four decimal places. To reverse it, 10.0576657 hp \u00d7 0.745699872 = approximately 7.5 kW. Small differences in the last digit usually come from the chosen display precision, not a different physical result.<\/p>\n<div style=\"margin:24px 0; padding:16px 20px; background:#f5f5f5; border:1px solid #e0e0e0; border-left:3px solid #2d2d2d;\"><strong>Engineering note<\/strong><p style=\"margin-bottom:0;\">Keep the unrounded value during intermediate calculations. Round only the reported result, and always label the horsepower convention beside it.<\/p><\/div>\n\n<h2>kW to HP Conversion Chart for Common Motor Ratings<\/h2>\n<figure style=\"margin:28px 0; text-align:center;\"><img decoding=\"async\" src=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_03.png\" alt=\"kW to HP Conversion Chart for Common Motor Ratings \u2014 BBP\" class=\"wp-image-6312\" width=\"1200\" height=\"800\" loading=\"lazy\" style=\"max-width:100%; height:auto; border-radius:8px;\" srcset=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_03.png 1200w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_03-300x200.png 300w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_03-1024x683.png 1024w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_03-768x512.png 768w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_03-18x12.png 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<p>This chart applies the mechanical-horsepower factor to ten common kW values. It is a reference table, not a catalog of standard hp motor sizes. When a converted number falls between available ratings, the next decision must come from the load, motor standard, manufacturer data, and operating conditions.<\/p>\n<p>The chart uses the same NIST basis because each row is a direct multiplication, not a rounded catalog substitution. Keep the source kW value visible when the result moves into a specification or quote.<\/p>\n<!-- [WEBSEARCH: https:\/\/www.nist.gov\/pml\/special-publication-811\/nist-guide-si-appendix-b-conversion-factors\/nist-guide-si-appendix-b9] -->\n<table data-calc-table=\"power:kilowatt:mechanical_horsepower\" style=\"width:100%;border-collapse:collapse;margin:24px 0;\"><caption style=\"text-align:left;font-weight:700;margin-bottom:10px;\">Common kW ratings converted to mechanical horsepower<\/caption><thead><tr><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Kilowatts<\/th><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Mechanical hp<\/th><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Practical reading<\/th><\/tr><\/thead><tbody><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">1 kW<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">1.3410 hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Exact unit equivalent<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">4 kW<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">5.3641 hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Compare with available rating<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">7.5 kW<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">10.0577 hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Often discussed as a 10 hp class<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">11 kW<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">14.7512 hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Do not round before selection<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">15 kW<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">20.1153 hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Equivalent, not a sizing margin<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">22 kW<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">29.5025 hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Verify catalog convention<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">30 kW<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">40.2307 hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Preserve rated output basis<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">45 kW<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">60.3460 hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Check speed and duty<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">75 kW<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">100.5767 hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Definition trap becomes visible<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">110 kW<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">147.5124 hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Confirm full application data<\/td><\/tr><\/tbody><\/table>\n<p>For a pump project, carry the exact converted value into the next calculation only if it represents the same location in the power chain. The <a href=\"https:\/\/bbpmfg.com\/blog\/pump-power-formula\/\">pump power formula guide<\/a> separates hydraulic output from shaft demand, while the <a href=\"https:\/\/bbpmfg.com\/irrigation-pumps\/agriculture-pump\/total-dynamic-head-tdh-calculator\/\">total dynamic head calculator<\/a> helps establish the system condition that the motor must serve.<\/p>\n\n<h2>The 1.4% Horsepower Definition Trap: Mechanical, Metric, and Electric HP<\/h2>\n<figure style=\"margin:28px 0; text-align:center;\"><img decoding=\"async\" src=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_04.png\" alt=\"The 1.4% Horsepower Definition Trap: Mechanical, Metric, and Electric HP \u2014 BBP\" class=\"wp-image-6313\" width=\"1200\" height=\"800\" loading=\"lazy\" style=\"max-width:100%; height:auto; border-radius:8px;\" srcset=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_04.png 1200w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_04-300x200.png 300w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_04-1024x683.png 1024w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_04-768x512.png 768w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_04-18x12.png 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<p>Mechanical hp, metric PS, and electric hp are different definitions. Printing only \u201cHP\u201d hides a decision that can change the result. Mechanical hp is the primary convention in this article; metric horsepower is labeled PS, and electric horsepower is labeled hp(E).<\/p>\n<p>The risk is a plausible-looking number with the wrong label. Because the definitions use different watt values, confusion can create a mismatch even when the arithmetic itself is correct.<\/p>\n<p>NIST publishes each definition separately. Its mechanical entry is based on 550 foot-pounds force per second, metric horsepower is 735.4988 watts at the table\u2019s precision, and electric horsepower is 746 watts. The <a href=\"https:\/\/www.bipm.org\/en\/publications\/si-brochure\" target=\"_blank\" rel=\"noopener\">BIPM SI Brochure<\/a> provides the SI system context for watts and prefixes, but horsepower itself is not an SI unit.<\/p>\n<blockquote style=\"margin:24px 0;padding:18px 22px;border-left:4px solid #2d2d2d;background:#f5f5f5;\"><p style=\"margin:0;\">\u201cThe nameplate power is the rated output power.\u201d<\/p><footer style=\"margin-top:8px;color:#6b7280;\">\u2014 <a href=\"https:\/\/www.pumpsandsystems.com\/article\/why-users-should-pay-attention-motor-nameplate-rating\/\" target=\"_blank\" rel=\"noopener\">Pumps &amp; Systems, article authored by a Flowserve motor specialist<\/a><\/footer><\/blockquote>\n<p>At 75 kW, the result is 100.576657 mechanical hp but 101.971621 metric PS. The metric result is 1.387% higher relative to the mechanical result. That gap is small enough to overlook in conversation and large enough to create a mismatch in a catalog comparison, replacement record, or quote.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:24px 0;\"><caption style=\"text-align:left;font-weight:700;margin-bottom:10px;\">Three horsepower definitions at 75 kW<\/caption><thead><tr><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Convention<\/th><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Watts per unit<\/th><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">75 kW result<\/th><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Use<\/th><\/tr><\/thead><tbody><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Mechanical hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">745.6999 W<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">100.5767 hp<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Primary calculator output<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Metric PS<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">735.4988 W<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">101.9716 PS<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Some continental specifications<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Electric hp(E)<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">746 W<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">100.5362 hp(E)<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Explicit electric-hp convention only<\/td><\/tr><\/tbody><\/table>\n<p>Do not \u201ccorrect\u201d a vendor\u2019s number until you know which convention was used. Ask for the definition, original unit, and rated measurement location. Numbers copied from a translated catalog may retain their digits while losing the label that made those digits meaningful.<\/p>\n<p>An engine datasheet may also report mechanical horsepower, but the label still needs checking because vehicle, marine, and regional documents can use different conventions and test conditions. This article keeps the calculator on one defined unit so an industrial motor comparison does not inherit an assumption from an unrelated engine context.<\/p>\n\n<h2>What Does a Motor Nameplate kW or HP Rating Mean?<\/h2>\n<figure style=\"margin:28px 0; text-align:center;\"><img decoding=\"async\" src=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_05.png\" alt=\"What Does a Motor Nameplate kW or HP Rating Mean? \u2014 BBP\" class=\"wp-image-6314\" width=\"1200\" height=\"800\" loading=\"lazy\" style=\"max-width:100%; height:auto; border-radius:8px;\" srcset=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_05.png 1200w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_05-300x200.png 300w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_05-1024x683.png 1024w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_05-768x512.png 768w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_05-18x12.png 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<p>On the reviewed standard industrial motor nameplates, hp or kW typically identifies rated mechanical output at the shaft. It is not the same as electrical input drawn from the supply. Always verify the actual nameplate and manufacturer documentation, especially for specialty or nonstandard equipment.<\/p>\n<p><a href=\"https:\/\/new.abb.com\/news\/detail\/80778\/how-to-read-a-nema-motor-nameplate\" target=\"_blank\" rel=\"noopener\">ABB\u2019s motor-manufacturer nameplate guide<\/a> defines rated horsepower as mechanical output capability at rated speed. It also defines efficiency as output power divided by input power. The two statements create a clean boundary: the nameplate output can be converted directly between kW and mechanical hp, while measured electrical input needs efficiency and operating-condition context.<\/p>\n<h3>The 4-Checkpoint Rated-Power Boundary Map<\/h3>\n<table style=\"width:100%;border-collapse:collapse;margin:24px 0;\"><thead><tr><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Rung<\/th><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Power location<\/th><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Missing input before the next rung<\/th><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Typical evidence<\/th><\/tr><\/thead><tbody><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">1<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Electrical input<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Motor efficiency and operating load<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Metered kW, voltage, current, power factor<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">2<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Motor shaft output<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Coupling or drive losses<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Motor nameplate and performance data<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">3<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Pump shaft demand<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Pump efficiency at the duty point<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Certified or manufacturer pump curve<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">4<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Hydraulic output<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">System flow, head, and fluid properties<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Duty-point and system data<\/td><\/tr><\/tbody><\/table>\n<p>At the system level, the <a href=\"https:\/\/www.energy.gov\/cmei\/ito\/motor-systems\" target=\"_blank\" rel=\"noopener\">U.S. Department of Energy motor-systems hub<\/a> organizes selection, field efficiency, sourcebooks, and case studies as connected work. That structure is a useful reminder: a unit converter can translate a value on one rung, but it cannot supply the missing evidence between rungs.<\/p>\n<p>Viewed this way, two documents can show different kW values without either being arithmetically wrong. A motor datasheet may list rated shaft output, a drive may report electrical input, and a pump curve may show power absorbed at the pump shaft. The word \u201cpower\u201d is not enough; the measurement boundary is part of the specification.<\/p>\n<p>For a replacement, capture the original plate before calculating. Record whether the machine runs directly online or through a drive, note the actual frequency and rated speed, and compare the driven load rather than the motor in isolation. These checks are not extra conversion steps. They are the evidence that tells the applications engineer whether the converted value belongs on the same rung as the proposed replacement.<\/p>\n\n<h2>Does Three-Phase Power Change the kW-to-HP Conversion?<\/h2>\n<figure style=\"margin:28px 0; text-align:center;\"><img decoding=\"async\" src=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_06.png\" alt=\"Does Three-Phase Power Change the kW-to-HP Conversion? \u2014 BBP\" class=\"wp-image-6315\" width=\"1200\" height=\"800\" loading=\"lazy\" style=\"max-width:100%; height:auto; border-radius:8px;\" srcset=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_06.png 1200w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_06-300x200.png 300w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_06-1024x683.png 1024w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_06-768x512.png 768w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_06-18x12.png 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<p>No. Three-phase power does not change the conversion between kW and mechanical hp. If the starting quantity is already mechanical output in kW, multiply by 1.34102209 regardless of phase. Phase matters only when voltage and current are used to estimate electrical input power.<\/p>\n<p>Searches for \u201ckW to hp conversion for three phase\u201d often combine two different tasks. A unit conversion starts with known power. An electrical calculation starts with circuit measurements and may require line voltage, current, power factor, phase configuration, and motor efficiency before anyone can estimate shaft output; the <a href=\"https:\/\/www.energy.gov\/cmei\/ito\/motor-systems\" target=\"_blank\" rel=\"noopener\">U.S. Department of Energy motor-systems resources<\/a> treat those as system variables rather than a different unit identity.<\/p>\n<div class=\"ecc-dodont\" style=\"display:flex;flex-wrap:wrap;gap:16px;margin:30px 0;\"><div class=\"ecc-do\" style=\"flex:1;min-width:250px;padding:18px 22px;background:#f5f5f5;border:1px solid #e0e0e0;\"><strong>Do<\/strong><ul><li>Confirm whether the starting kW is input or output.<\/li><li>Convert known shaft kW directly to mechanical hp.<\/li><li>Keep power factor and efficiency as separate inputs.<\/li><li>Verify the actual nameplate and operating load.<\/li><\/ul><\/div><div class=\"ecc-dont\" style=\"flex:1;min-width:250px;padding:18px 22px;background:#fff;border:1px dashed #e0e0e0;\"><strong>Don&#8217;t<\/strong><ul><li>Change the unit factor because the supply is three-phase.<\/li><li>Treat current alone as a shaft-power reading.<\/li><li>Assume power factor equals motor efficiency.<\/li><li>Use rated output as measured electrical consumption.<\/li><\/ul><\/div><\/div>\n<p>Suppose a motor nameplate shows 15 kW rated output. That rating converts to 20.1153 mechanical hp whether the motor is single-phase or three-phase. If instead a technician has only voltage and current readings, the technician is not yet at the unit-conversion step. The electrical input must be established first, followed by a supported efficiency basis if shaft output is needed.<\/p>\n\n<h2>When Not to Use Converted Horsepower to Size a Pump Motor<\/h2>\n<figure style=\"margin:28px 0; text-align:center;\"><img decoding=\"async\" src=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_07.png\" alt=\"When Not to Use Converted Horsepower to Size a Pump Motor \u2014 BBP\" class=\"wp-image-6316\" width=\"1200\" height=\"800\" loading=\"lazy\" style=\"max-width:100%; height:auto; border-radius:8px;\" srcset=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_07.png 1200w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_07-300x200.png 300w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_07-1024x683.png 1024w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_07-768x512.png 768w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_07-18x12.png 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<p>Do not size a pump motor from converted horsepower alone. The converted number may describe a nameplate output, but the motor decision must cover pump shaft demand across the required operating range, the duty point, speed, fluid, starting method, service conditions, and manufacturer limits.<\/p>\n<p>The sizing risk remains because a unit conversion contains no evidence about the pump curve, operating margin, or installation. A precise equivalent can still support the wrong motor decision.<\/p>\n<p><a href=\"https:\/\/datatool.pumps.org\/pump-fundamentals\/pump-curves\" target=\"_blank\" rel=\"noopener\">Hydraulic Institute pump-curve guidance<\/a> places head, flow, efficiency, input power, and net positive suction head required on the same performance map. It also defines the best-efficiency point and operating regions. None of those conditions appears in the equation \u201ckW \u00d7 1.34102209.\u201d<\/p>\n<p>Converting a 75 kW nameplate produces 100.5767 mechanical hp with excellent arithmetic. The selection can still be wrong if 75 kW is electrical input rather than rated output, if the pump requires more shaft power away from the quoted duty point, if speed or frequency changes, or if the replacement frame and enclosure cannot fit the installation.<\/p>\n<p>Use the conversion as a normalization step inside a larger sequence:<\/p>\n<ol><li><strong>Identify the original value.<\/strong> Record the label, unit, convention, and whether it is input, motor output, or pump demand.<\/li><li><strong>Establish the pump duty.<\/strong> Confirm flow, total dynamic head, fluid, operating range, and speed. For system-side work, start with the <a href=\"https:\/\/bbpmfg.com\/irrigation-pumps\/agriculture-pump\/total-dynamic-head-tdh-calculator\/\">TDH calculator<\/a>.<\/li><li><strong>Read the pump curve.<\/strong> Use power and efficiency at the intended operating point, not a generic factor.<\/li><li><strong>Apply motor-selection constraints.<\/strong> Preserve supply, frequency, speed, frame, enclosure, mounting, duty, starting method, and manufacturer margin rules.<\/li><li><strong>Compare standard ratings.<\/strong> Only now map the verified requirement to an available motor rating.<\/li><\/ol>\n<p>For deeper pump-type context, the <a href=\"https:\/\/bbpmfg.com\/centrifugal-pumps\/\">centrifugal pump hub<\/a> routes different hydraulic configurations, while the <a href=\"https:\/\/bbpmfg.com\/blog\/the-engineers-field-guide-to-end-suction-pumps-types-selection-long-term-performance\/\">end-suction pump field guide<\/a> shows why layout and long-term operating conditions matter beyond nameplate power.<\/p>\n\n<h2>The Nameplate-to-RFQ Power Handshake<\/h2>\n<figure style=\"margin:28px 0; text-align:center;\"><img decoding=\"async\" src=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_08.png\" alt=\"The Nameplate-to-RFQ Power Handshake \u2014 BBP\" class=\"wp-image-6317\" width=\"1200\" height=\"800\" loading=\"lazy\" style=\"max-width:100%; height:auto; border-radius:8px;\" srcset=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_08.png 1200w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_08-300x200.png 300w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_08-1024x683.png 1024w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_08-768x512.png 768w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_08-18x12.png 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<p>In this practical BBP-recommended RFQ framework, assign label consistency to procurement, the duty and power chain to applications engineering, and the installed-equipment record to maintenance. Useful RFQs state both the normalized power value and the evidence behind it, preventing a correct conversion from becoming an incorrect replacement.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:24px 0;\"><caption style=\"text-align:left;font-weight:700;margin-bottom:10px;\">Nine-check motor power handoff matrix<\/caption><thead><tr><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Check category<\/th><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Owner<\/th><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Required evidence<\/th><th style=\"text-align:left;padding:10px;border-bottom:2px solid #2d2d2d;\">Release question<\/th><\/tr><\/thead><tbody><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Original power label<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Maintenance<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Clear nameplate image<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Is this input or rated output?<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Horsepower convention<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Procurement<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Catalog definition<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Mechanical hp, PS, or hp(E)?<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Rated speed<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Applications<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">rpm and frequency<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Will speed remain equivalent?<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Supply<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Electrical<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Voltage, phase, frequency<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Is the replacement compatible?<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Pump duty point<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Applications<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Flow, head, fluid, curve<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">What shaft demand must be covered?<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Operating range<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Applications<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Minimum and maximum conditions<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Where is maximum power?<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Frame and mounting<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Maintenance<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Dimensions and shaft details<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Will it physically interchange?<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Enclosure and environment<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Maintenance<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Ambient and ingress requirements<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Does protection match the site?<\/td><\/tr><tr><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Final standard rating<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Procurement<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Approved datasheet<\/td><td style=\"padding:10px;border-bottom:1px solid #e0e0e0;\">Has engineering released the rating?<\/td><\/tr><\/tbody><\/table>\n<p>For a broader quote-request structure, use the <a href=\"https:\/\/bbpmfg.com\/blog\/how-to-write-rfq-industrial-pumps\/\">industrial pump RFQ guide<\/a>. Add the original nameplate photo and the converted value as two separate fields. That keeps the source evidence visible instead of replacing it with a rounded number.<\/p>\n<div class=\"ecc-takeaway\" style=\"margin:30px 0;padding:22px 26px;background:#f5f5f5;border:1px solid #e0e0e0;border-left:4px solid #2d2d2d;\"><strong class=\"ecc-takeaway-label\" style=\"display:block;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:#6b7280;margin-bottom:8px;\">Key takeaway<\/strong><p style=\"margin:0;\">Convert the unit only after naming the horsepower convention and power location; select the motor only after verifying the driven-equipment duty.<\/p><\/div>\n\n<h2>Frequently Asked Questions<\/h2>\n<details><summary>How do you convert kW to hp?<\/summary><p>Multiply kW by 1.34102209 for mechanical horsepower. For example, 5 kW \u00d7 1.34102209 = 6.7051 hp. Label the result \u201cmechanical hp\u201d so it is not confused with metric PS. Keep the full factor through the calculation and round only the displayed result. If a source uses PS or electric horsepower, change the definition before using the number in specifications or comparison tables.<\/p><\/details>\n<details><summary>Is 1 kW equal to 1 hp?<\/summary><p>No. One kilowatt equals approximately 1.3410 mechanical hp. In the other direction, one mechanical hp equals approximately 0.7457 kW. The units express the same dimension at different scales. State which hp definition you mean because metric PS and electric horsepower use slightly different watt values. A one-for-one substitution introduces avoidable error.<\/p><\/details>\n<details><summary>How many hp is a 7.5 kW motor?<\/summary><p>For a 7.5 kW rated mechanical output, the equivalent is 10.0577 mechanical hp. Catalog grouping may place it near a 10 hp class, but replacement selection still requires rated speed, voltage, phase, frequency, frame, enclosure, mounting, starting method, driven-equipment duty, operating range, and manufacturer approval. Keep the nameplate image with the converted value so applications engineering can confirm that both numbers describe the same power location.<\/p><\/details>\n<details><summary>How much hp is 75 kW?<\/summary><p>Seventy-five kilowatts equals 100.5767 mechanical hp or 101.9716 metric PS. The answer changes because the two horsepower conventions have different watt definitions.<\/p><\/details>\n<details><summary>Does three-phase use a different kW-to-hp formula?<\/summary><p>No. Known kW converts to mechanical hp with the same factor. Three-phase formulas are relevant only when voltage, current, and power factor are being used to estimate electrical input power.<\/p><\/details>\n<details><summary>Can I choose a pump motor from the converted hp?<\/summary><p>Not from conversion alone. Confirm pump shaft demand at the duty point and across the required operating range, then apply motor and installation constraints. Use the converted result only to normalize units.<\/p><\/details>\n\n<h2>Use the Conversion Without Losing the Engineering Context<\/h2>\n<figure style=\"margin:28px 0; text-align:center;\"><img decoding=\"async\" src=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_10.png\" alt=\"Use the Conversion Without Losing the Engineering Context \u2014 BBP\" class=\"wp-image-6318\" width=\"1200\" height=\"800\" loading=\"lazy\" style=\"max-width:100%; height:auto; border-radius:8px;\" srcset=\"https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_10.png 1200w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_10-300x200.png 300w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_10-1024x683.png 1024w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_10-768x512.png 768w, https:\/\/bbpmfg.com\/wp-content\/uploads\/2026\/08\/kw-to-hp-h2_10-18x12.png 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<p>The kW-to-hp identity is simple; the specification around it is not. Fix the horsepower convention, keep input and output power separate, preserve precision through the calculation, and carry the original nameplate evidence into the RFQ. Those steps prevent most errors without turning a unit converter into an unsupported sizing tool.<\/p>\n<p>For an application-specific pump review, prepare the duty point, fluid data, operating range, motor nameplate, and installation constraints before requesting a selection. Keeping these inputs together lets the pump and motor be assessed as a system instead of approving a replacement from one converted number.<\/p>\n<p><a href=\"https:\/\/bbpmfg.com\/blog\/how-to-write-rfq-industrial-pumps\/\" style=\"display:inline-block; padding:14px 32px; background:#2d2d2d; color:#ffffff; font-weight:700; text-decoration:none;\">Prepare a Pump RFQ \u2192<\/a><\/p>\n\n<div style=\"margin:48px 0 24px; padding:20px 24px; background:#f5f5f5; border:1px solid #e0e0e0;\"><h3 style=\"margin:0 0 12px;\">About This Conversion Guide<\/h3><p style=\"color:#6b7280; margin:0;\">BBP Manufacturing Co., Ltd. publishes this guide to keep power-unit arithmetic separate from centrifugal pump and motor selection. The conversion table is generated from the NIST-backed mechanical-horsepower definition, while the selection boundaries are tied to motor nameplate and pump-curve evidence.<\/p><\/div>\n<div style=\"margin:48px 0 24px; padding:24px; background:#f5f5f5; border:1px solid #e0e0e0;\"><h3 style=\"margin:0 0 16px;\">Related Articles<\/h3><ul style=\"padding-left:20px; margin:0;\"><li><a href=\"https:\/\/bbpmfg.com\/blog\/pump-power-formula\/\" style=\"text-decoration:underline; text-underline-offset:3px; color:#2d2d2d;\">Pump Power Formula \u2014 separate hydraulic, shaft, and motor power<\/a><\/li><li><a href=\"https:\/\/bbpmfg.com\/blog\/how-to-write-rfq-industrial-pumps\/\" style=\"text-decoration:underline; text-underline-offset:3px; color:#2d2d2d;\">How to Write an Industrial Pump RFQ \u2014 organize application evidence<\/a><\/li><li><a href=\"https:\/\/bbpmfg.com\/blog\/centrifugal-water-pumps-blog\/\" style=\"text-decoration:underline; text-underline-offset:3px; color:#2d2d2d;\">Centrifugal Water Pumps \u2014 connect motor power to pump duty<\/a><\/li><li><a href=\"https:\/\/bbpmfg.com\/blog\/horizontal-split-case-pump-guide\/\" style=\"text-decoration:underline; text-underline-offset:3px; color:#2d2d2d;\">Horizontal Split Case Pump Guide \u2014 review duty and configuration<\/a><\/li><\/ul><\/div>\n<div style=\"margin:48px 0 24px; padding:24px; background:#f5f5f5; border:1px solid #e0e0e0; border-top:3px solid #2d2d2d;\"><h3 style=\"margin:0 0 16px;\">References &amp; Sources<\/h3><ol style=\"padding-left:20px; color:#6b7280;\"><li style=\"padding:4px 0;\"><a href=\"https:\/\/www.nist.gov\/pml\/special-publication-811\/nist-guide-si-appendix-b-conversion-factors\/nist-guide-si-appendix-b9\" style=\"text-decoration:underline; text-underline-offset:3px; color:#2d2d2d;\" target=\"_blank\" rel=\"noopener\">NIST Guide to the SI, Appendix B.9 \u2014 Power Conversion Factors<\/a> \u2014 National Institute of Standards and Technology<\/li><li style=\"padding:4px 0;\"><a href=\"https:\/\/www.bipm.org\/en\/publications\/si-brochure\" style=\"text-decoration:underline; text-underline-offset:3px; color:#2d2d2d;\" target=\"_blank\" rel=\"noopener\">The International System of Units, SI Brochure<\/a> \u2014 Bureau International des Poids et Mesures<\/li><li style=\"padding:4px 0;\"><a href=\"https:\/\/www.energy.gov\/cmei\/ito\/motor-systems\" style=\"text-decoration:underline; text-underline-offset:3px; color:#2d2d2d;\" target=\"_blank\" rel=\"noopener\">Motor Systems Technical Publications and Case Studies<\/a> \u2014 U.S. Department of Energy<\/li><li style=\"padding:4px 0;\"><a href=\"https:\/\/datatool.pumps.org\/pump-fundamentals\/pump-curves\" style=\"text-decoration:underline; text-underline-offset:3px; color:#2d2d2d;\" target=\"_blank\" rel=\"noopener\">Pump Curves: Head, Power, Efficiency, and NPSHR<\/a> \u2014 Hydraulic Institute<\/li><li style=\"padding:4px 0;\"><a href=\"https:\/\/new.abb.com\/news\/detail\/80778\/how-to-read-a-nema-motor-nameplate\" style=\"text-decoration:underline; text-underline-offset:3px; color:#2d2d2d;\" target=\"_blank\" rel=\"noopener\">How to Read a NEMA Motor Nameplate<\/a> \u2014 ABB motor-manufacturer technical guide<\/li><li style=\"padding:4px 0;\"><a href=\"https:\/\/www.pumpsandsystems.com\/article\/why-users-should-pay-attention-motor-nameplate-rating\/\" style=\"text-decoration:underline; text-underline-offset:3px; color:#2d2d2d;\" target=\"_blank\" rel=\"noopener\">Why Users Should Pay Attention to the Motor Nameplate Rating<\/a> \u2014 Pumps &amp; Systems; authored by a Flowserve motor specialist<\/li><\/ol><\/div>\n","protected":false},"excerpt":{"rendered":"<p>To convert kW to hp, multiply kilowatts by 1.34102209 for mechanical horsepower. For example, a 7.5 kW rating is 10.0577 mechanical hp. The arithmetic is exact enough for documentation, but it does not by itself select a motor or prove that two nameplates are interchangeable. A kW to hp calculator is a bidirectional unit converter [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6309,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-6319","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bbp-blogs"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":7}},"_links":{"self":[{"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/posts\/6319","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/comments?post=6319"}],"version-history":[{"count":3,"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/posts\/6319\/revisions"}],"predecessor-version":[{"id":6350,"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/posts\/6319\/revisions\/6350"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/media\/6309"}],"wp:attachment":[{"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/media?parent=6319"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/categories?post=6319"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/tags?post=6319"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}