{"id":100267,"date":"2026-02-15T20:31:08","date_gmt":"2026-02-15T20:31:08","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100267"},"modified":"2026-07-15T22:34:09","modified_gmt":"2026-07-15T22:34:09","slug":"torque-unit-converter","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/sl\/calculators\/torque-unit-converter\/","title":{"rendered":"Controlled Torque Unit Conversion Worksheet"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Controlled Torque Unit Conversion Worksheet\",\"description\":\"Convert signed moment-of-force or torque values through N\u00b7m using documented BIPM and NIST unit definitions and conversion factors.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/torque-unit-converter\/\",\"applicationCategory\":\"EngineeringApplication\",\"operatingSystem\":\"Any web 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.tuc-hero{box-shadow:none;break-inside:avoid}}\n<\/style>\n<main id=\"tuc-tool\">\n  <header class=\"tuc-hero\"><p class=\"tuc-kicker\">Controlled unit worksheet<\/p><h1>Torque Unit Conversion<\/h1><p class=\"tuc-lead\">Convert a signed moment-of-force or torque value through N\u00b7m using documented conversion factors. This page converts units only; it does not select a tightening torque or assess equipment.<\/p><div class=\"tuc-badges\"><span class=\"tuc-badge\">BIPM SI units<\/span><span class=\"tuc-badge\">NIST conversion factors<\/span><span class=\"tuc-badge\">Sign preserved<\/span><span class=\"tuc-badge\">No fastener recommendation<\/span><\/div><\/header>\n  <div class=\"tuc-grid\">\n    <section class=\"tuc-card\" aria-labelledby=\"tuc-input-heading\"><h2 id=\"tuc-input-heading\">Input<\/h2><form id=\"tuc-form\" novalidate>\n      <div class=\"tuc-field\"><label for=\"tuc-ref\">Source \/ quantity record<\/label><input id=\"tuc-ref\" type=\"text\" maxlength=\"180\" autocomplete=\"off\" placeholder=\"e.g. drawing M-17, joint 4, signed clockwise\"><span class=\"tuc-help\">Required. Identify the drawing, data sheet, measurement or calculation being converted.<\/span><\/div>\n      <div class=\"tuc-field\"><label for=\"tuc-value\">Signed value<\/label><input id=\"tuc-value\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" placeholder=\"e.g. -25.4\"><span class=\"tuc-help\">Zero and negative values are valid. The sign convention is preserved, not interpreted.<\/span><\/div>\n      <div class=\"tuc-field\"><label for=\"tuc-from\">Input unit<\/label><select id=\"tuc-from\"><option value=\"Nm\">N\u00b7m<\/option><option value=\"Nmm\">N\u00b7mm<\/option><option value=\"mNm\">mN\u00b7m<\/option><option value=\"dNm\">dN\u00b7m<\/option><option value=\"kgfm\">kgf\u00b7m<\/option><option value=\"lbfft\">lbf\u00b7ft<\/option><option value=\"lbfin\">lbf\u00b7in<\/option><option value=\"ozfin\">ozf\u00b7in<\/option><\/select><\/div>\n      <label class=\"tuc-check\" for=\"tuc-confirm\"><input id=\"tuc-confirm\" type=\"checkbox\"><span>I confirm this is a moment-of-force \/ torque quantity. Although N\u00b7m has the same dimensions as a joule, this converter must not be used for energy.<\/span><\/label>\n      <div class=\"tuc-actions\"><button type=\"submit\">Convert<\/button><button class=\"tuc-secondary\" type=\"button\" id=\"tuc-clear\">Clear<\/button><\/div><div class=\"tuc-error\" id=\"tuc-error\" role=\"alert\"><\/div>\n    <\/form><\/section>\n    <section class=\"tuc-card\" aria-labelledby=\"tuc-result-heading\"><h2 id=\"tuc-result-heading\">Conversion record<\/h2><div class=\"tuc-empty\" id=\"tuc-empty\">Enter a documented value and select Convert. No example number is preloaded.<\/div><div class=\"tuc-results\" id=\"tuc-results\" aria-live=\"polite\"><div class=\"tuc-primary\"><small>Canonical value<\/small><strong id=\"tuc-primary\">\u2014<\/strong><\/div><table class=\"tuc-output-table\"><thead><tr><th>Unit<\/th><th>Converted value<\/th><\/tr><\/thead><tbody><tr><td>N\u00b7m<\/td><td id=\"tuc-out-Nm\">\u2014<\/td><\/tr><tr><td>N\u00b7mm<\/td><td id=\"tuc-out-Nmm\">\u2014<\/td><\/tr><tr><td>mN\u00b7m<\/td><td id=\"tuc-out-mNm\">\u2014<\/td><\/tr><tr><td>dN\u00b7m<\/td><td id=\"tuc-out-dNm\">\u2014<\/td><\/tr><tr><td>kgf\u00b7m<\/td><td id=\"tuc-out-kgfm\">\u2014<\/td><\/tr><tr><td>lbf\u00b7ft<\/td><td id=\"tuc-out-lbfft\">\u2014<\/td><\/tr><tr><td>lbf\u00b7in<\/td><td id=\"tuc-out-lbfin\">\u2014<\/td><\/tr><tr><td>ozf\u00b7in<\/td><td id=\"tuc-out-ozfin\">\u2014<\/td><\/tr><\/tbody><\/table><p class=\"tuc-record\" id=\"tuc-record\"><\/p><\/div><\/section>\n  <\/div>\n  <section class=\"tuc-section\" aria-labelledby=\"tuc-method-heading\"><h2 id=\"tuc-method-heading\">Method and factors<\/h2><div class=\"tuc-cols\"><div><h3>Canonical calculation<\/h3><p>Each input is first converted to N\u00b7m and then divided by the target-unit factor:<\/p><div class=\"tuc-formula\">M[N\u00b7m] = x<sub>from<\/sub> \u00b7 c<sub>from<\/sub><br>x<sub>to<\/sub> = M[N\u00b7m] \/ c<sub>to<\/sub><\/div><p>The same signed physical quantity is represented in every row. Conversion does not change direction, uncertainty or meaning.<\/p><\/div><div><h3>Factors used<\/h3><div class=\"tuc-formula\">1 N\u00b7mm = 0.001 N\u00b7m<br>1 mN\u00b7m = 0.001 N\u00b7m<br>1 dN\u00b7m = 0.1 N\u00b7m<br>1 kgf\u00b7m = 9.80665 N\u00b7m<br>1 lbf\u00b7ft = 1.3558179483314004 N\u00b7m<br>1 lbf\u00b7in = 0.1129848290276167 N\u00b7m<br>1 ozf\u00b7in = 0.007061551814226043 N\u00b7m<\/div><p class=\"tuc-small\">The lbf-based factors are derived from the NIST exact lbf factor at standard gravity and the exact international foot\/inch definitions. This preserves exactly 12 in = 1 ft and 16 ozf = 1 lbf. Displayed digits do not create measurement accuracy.<\/p><\/div><\/div>\n    <div class=\"tuc-callout\"><strong>Safety boundary:<\/strong> a unit conversion cannot determine a safe fastener tightening torque, shaft capacity, coupling rating or wrench setting. Use the applicable controlled specification and account for friction, lubrication, preload, uncertainty and tool calibration.<\/div>\n  <\/section>\n  <section class=\"tuc-section\" aria-labelledby=\"tuc-meaning-heading\"><h2 id=\"tuc-meaning-heading\">Quantity and notation<\/h2><div class=\"tuc-cols\"><div><h3>Torque is not energy<\/h3><p>BIPM identifies torque as the cross product of position and force. Its SI unit is N\u00b7m. Torque and energy share dimensions, but the joule is not used for torque; the quantity name and context matter.<\/p><h3>Force units, not mass units<\/h3><p><code>kgf<\/code>, <code>lbf<\/code> and <code>ozf<\/code> are force units. They must not be confused with kg, lb or oz mass.<\/p><\/div><div><h3>SI prefixes<\/h3><p><code>dN\u00b7m<\/code> means decinewton metre and equals 0.1 N\u00b7m. <code>mN\u00b7m<\/code> means millinewton metre. <code>N\u00b7mm<\/code> and <code>mN\u00b7m<\/code> are numerically equal for the same torque, but their written unit expressions differ.<\/p><h3>Signed values<\/h3><p>A minus sign is retained in every output. It has meaning only after the user defines an axis and positive direction; the converter does not decide clockwise\/counter-clockwise or input\/output direction.<\/p><\/div><\/div><\/section>\n  <section class=\"tuc-section\" aria-labelledby=\"tuc-source-heading\"><h2 id=\"tuc-source-heading\">Sources and normative status<\/h2><table class=\"tuc-source\"><thead><tr><th>Source<\/th><th>Verified use<\/th><th>Boundary<\/th><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/www.bipm.org\/en\/publications\/si-brochure\/\" rel=\"noopener\" target=\"_blank\">BIPM SI Brochure, 9th edition, version 4.01 (2026)<\/a><\/td><td>Torque unit N\u00b7m; torque\/energy distinction; SI prefix values.<\/td><td>Official SI publication.<\/td><\/tr><tr><td><a href=\"https:\/\/www.nist.gov\/pml\/special-publication-811\/nist-guide-si-appendix-b-conversion-factors\/nist-guide-si-appendix-b8\" rel=\"noopener\" target=\"_blank\">NIST SP 811, Appendix B.8 and footnote 23<\/a><\/td><td>kgf\u00b7m and moment-of-force factors; exact lbf conversion at standard gravity; foot\/inch relations.<\/td><td>Official conversion table and definition note. Decimal calculation is shown transparently.<\/td><\/tr><tr><td><a href=\"https:\/\/www.iso.org\/standard\/64975.html\" rel=\"noopener\" target=\"_blank\">ISO 80000-4:2019 + Amd 1:2025<\/a><\/td><td>Official public lifecycle and mechanics quantities\/units scope.<\/td><td>Published and marked to be revised; exact clauses require a licensed controlled copy. This converter makes no ISO-conformity claim.<\/td><\/tr><\/tbody><\/table><div class=\"tuc-callout tuc-ok\"><strong>Classification:<\/strong> deterministic unit conversion using published definitions and factors. It is not a design formula, acceptance criterion, calibration certificate or normative torque table.<\/div><\/section>\n  <section class=\"tuc-section\" aria-labelledby=\"tuc-example-heading\"><h2 id=\"tuc-example-heading\">Check example<\/h2><p>Using the derived factor, <code>10 lbf\u00b7ft \u00d7 1.3558179483314004 = 13.558179483314004 N\u00b7m<\/code>. The same quantity is exactly <code>120 lbf\u00b7in<\/code> before display rounding because 1 ft = 12 in.<\/p><\/section>\n  <p class=\"tuc-footer\">Technical revision: 15 July 2026 \u00b7 English source page \u00b7 Preserve the original uncertainty and sign convention in any downstream record.<\/p>\n<\/main>\n<script>\n(function(){'use strict';\n const byId=id=>document.getElementById(id),form=byId('tuc-form'),error=byId('tuc-error'),results=byId('tuc-results'),empty=byId('tuc-empty');\n const LBF_N=4.4482216152605,units={Nm:{label:'N\u00b7m',factor:1},Nmm:{label:'N\u00b7mm',factor:.001},mNm:{label:'mN\u00b7m',factor:.001},dNm:{label:'dN\u00b7m',factor:.1},kgfm:{label:'kgf\u00b7m',factor:9.80665},lbfft:{label:'lbf\u00b7ft',factor:LBF_N*.3048},lbfin:{label:'lbf\u00b7in',factor:LBF_N*.0254},ozfin:{label:'ozf\u00b7in',factor:LBF_N\/16*.0254}};\n function parseDecimal(raw){const s=String(raw).trim();if(!s)throw new Error('Signed value is required.');if(s.length>40||!\/^[-+]?(?:\\d+(?:[.,]\\d*)?|[.,]\\d+)$\/.test(s))throw new Error('Signed value must be one complete decimal number; exponent notation and unit text are not accepted.');const value=Number(s.replace(',','.'));if(!Number.isFinite(value)||Math.abs(value)>1e15)throw new Error('Signed value must be finite and its magnitude no greater than 1\u00d710\u00b9\u2075.');return value;}\n function format(value){if(!Number.isFinite(value))return '\u2014';if(Object.is(value,-0)||value===0)return '0';const abs=Math.abs(value);if(abs>=1e13||abs<1e-7)return value.toExponential(7);return Number(value.toPrecision(9)).toString();}\n function clearResult(){results.classList.remove('tuc-show');empty.hidden=false;error.classList.remove('tuc-show');error.textContent='';}\n function showError(message){clearResult();error.textContent=message;error.classList.add('tuc-show');}\n function convert(event){event.preventDefault();try{const ref=byId('tuc-ref').value.trim();if(!ref)throw new Error('Source \/ quantity record is required.');if(!byId('tuc-confirm').checked)throw new Error('Confirm that the input is a moment-of-force \/ torque quantity, not energy.');const value=parseDecimal(byId('tuc-value').value),from=byId('tuc-from').value,entry=units[from];if(!entry)throw new Error('Select a supported input unit.');const nm=value*entry.factor;if(!Number.isFinite(nm))throw new Error('Converted value is outside the finite range.');byId('tuc-primary').textContent=format(nm)+' N\u00b7m';for(const[key,unit]of Object.entries(units))byId('tuc-out-'+key).textContent=format(nm\/unit.factor)+' '+unit.label;byId('tuc-record').textContent='Source \/ quantity record: '+ref+' \u00b7 Input: '+format(value)+' '+entry.label+' \u00b7 Sign preserved.';error.classList.remove('tuc-show');error.textContent='';empty.hidden=true;results.classList.add('tuc-show');}catch(e){showError(e instanceof Error?e.message:'Conversion failed.');}}\n form.addEventListener('submit',convert);byId('tuc-clear').addEventListener('click',function(){form.reset();clearResult();byId('tuc-value').focus();});clearResult();\n})();\n<\/script>\n\n","protected":false},"excerpt":{"rendered":"<p>Convert signed torque or moment-of-force values through N\u00b7m using BIPM and NIST-traceable definitions and factors; no tightening-torque recommendation.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100267","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/sl\/wp-json\/wp\/v2\/calculator\/100267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/sl\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/sl\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/sl\/wp-json\/wp\/v2\/calculator\/100267\/revisions"}],"predecessor-version":[{"id":102610,"href":"https:\/\/vibromera.eu\/sl\/wp-json\/wp\/v2\/calculator\/100267\/revisions\/102610"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/sl\/wp-json\/wp\/v2\/media?parent=100267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/sl\/wp-json\/wp\/v2\/categories?post=100267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/sl\/wp-json\/wp\/v2\/tags?post=100267"}],"curies":[{"name":"delovni list","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}