{"id":100266,"date":"2026-02-15T20:31:05","date_gmt":"2026-02-15T20:31:05","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100266"},"modified":"2026-02-15T20:31:05","modified_gmt":"2026-02-15T20:31:05","slug":"torque-power-speed","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/nb\/calculators\/torque-power-speed\/","title":{"rendered":"Dreiemoment \u2014 Effekt \u2014 Hastighetskalkulator | kW, Nm, o\/min"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Torque \u2014 Power \u2014 Speed Calculator\",\"alternateName\":[\"Torque Power RPM Calculator\",\"kW to Nm Calculator\",\"Power to Torque Converter\"],\"description\":\"Free online engineering calculator to convert between torque (Nm), power (kW), and rotational speed (RPM). Given any two values, calculate the third. Includes imperial conversions.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/torque-power-speed\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any (Web Browser)\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2024-01-01\",\"dateModified\":\"2025-02-14\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true,\"featureList\":[\"Solve for torque, power, or speed\",\"Metric and Imperial results\",\"Angular velocity calculation\",\"HP conversion\",\"Auto-calculation on input change\",\"URL parameter sharing\"],\"keywords\":\"torque, power, speed, Nm, kW, RPM, hp, angular velocity\"}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"How do I calculate torque from power and speed?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Torque (Nm) = 9549 \u00d7 Power (kW) \/ Speed (RPM). This is derived from the fundamental relationship P = T \u00d7 \u03c9, where \u03c9 = 2\u03c0n\/60. The constant 9549 simplifies the calculation: 60000\/(2\u03c0) \u2248 9549.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the relationship between kW and Nm?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Power in kW and torque in Nm are related through rotational speed: P = T \u00d7 n \/ 9549. At any given speed, higher torque means higher power. At constant power, torque decreases as speed increases (inverse relationship).\"}},\n{\"@type\":\"Question\",\"name\":\"What is the 9549 constant?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The constant 9549 comes from the unit conversion: 9549 \u2248 60000\/(2\u03c0). It appears when converting between kW, Nm, and RPM. The exact value is 9549.2966... Using P(kW) = T(Nm) \u00d7 n(RPM) \/ 9549.\"}},\n{\"@type\":\"Question\",\"name\":\"How do I convert kW to hp?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"1 kW = 1.341 hp (mechanical horsepower). Conversely, 1 hp = 0.7457 kW. This is the mechanical (imperial) horsepower. Metric horsepower (PS) is slightly different: 1 PS = 0.7355 kW.\"}},\n{\"@type\":\"Question\",\"name\":\"Does torque change with speed?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For a given power source, yes. Electric motors have a rated torque at rated speed. At constant power output, torque is inversely proportional to speed: T = 9549 \u00d7 P \/ n. However, actual motor torque curves vary \u2014 induction motors have peak torque (breakdown torque) at a specific slip speed.\"}}\n]}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[\n{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},\n{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},\n{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Torque Power Speed Calculator\",\"item\":\"https:\/\/vibromera.eu\/calculators\/torque-power-speed\/\"}\n]}\n<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&#038;family=JetBrains+Mono:wght@400;500;600&#038;family=Fraunces:opsz,wght@9..144,700;9..144,800&#038;display=swap\" rel=\"stylesheet\">\n\n<link rel=\"stylesheet\" href=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.css\">\n\n<style>\n:root {\n    --vc-bg: #f4f1ec;\n    --vc-surface: #ffffff;\n    --vc-surface-alt: #f8f6f2;\n    --vc-ink: #1a1a1a;\n    --vc-ink-secondary: #5a5650;\n    --vc-ink-muted: #8a857e;\n    --vc-accent: #c85a2a;\n    --vc-accent-hover: #b04d22;\n    --vc-accent-light: #fdf0ea;\n    --vc-blue: #2a5c8c;\n    --vc-blue-light: #eaf1f8;\n    --vc-green: #2a7a4b;\n    --vc-green-light: #eaf8ef;\n    --vc-yellow: #a67c00;\n    --vc-yellow-light: #fef9e8;\n    --vc-red: #b91c1c;\n    --vc-red-light: #fef2f2;\n    --vc-border: #d9d4cc;\n    --vc-border-light: #e8e4dd;\n    --vc-shadow: 0 1px 3px rgba(26,26,26,0.06), 0 4px 12px rgba(26,26,26,0.04);\n    --vc-shadow-lg: 0 4px 12px rgba(26,26,26,0.08), 0 16px 40px rgba(26,26,26,0.06);\n    --vc-radius: 8px;\n    --vc-radius-lg: 12px;\n    --vc-font: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;\n    --vc-mono: 'JetBrains Mono', 'Consolas', 'Monaco', monospace;\n    --vc-display: 'Fraunces', Georgia, serif;\n}\n\n.vc-calculator {\n    font-family: var(--vc-font);\n    font-size: 15px;\n    line-height: 1.65;\n    color: var(--vc-ink);\n    max-width: 960px;\n    margin: 0 auto;\n    padding: 20px 16px 40px;\n    -webkit-font-smoothing: antialiased;\n}\n.vc-calculator *, .vc-calculator *::before, .vc-calculator *::after { box-sizing: border-box; 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Given any two, calculate the third. Supports kW, Nm, RPM with imperial conversions.<\/p>\n    <div class=\"vc-badges\">\n        <span class=\"vc-badge\">kW \u2194 Nm \u2194 RPM<\/span>\n        <span class=\"vc-badge\">hp &amp; ft\u00b7lbf<\/span>\n        <span class=\"vc-badge\">T = 9549 \u00d7 P \/ n<\/span>\n    <\/div>\n<\/header>\n\n<!-- Calculator Card -->\n<div class=\"vc-card\">\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\n        <div class=\"vc-form-grid\">\n            <div class=\"vc-field vc-field-full\">\n                <label class=\"vc-label\" for=\"vc-solve\">Solve For<\/label>\n                <select class=\"vc-select\" id=\"vc-solve\">\n                    <option value=\"torque\" selected>Torque (Nm) \u2014 from Power &amp; Speed<\/option>\n                    <option value=\"power\">Power (kW) \u2014 from Torque &amp; Speed<\/option>\n                    <option value=\"speed\">Speed (RPM) \u2014 from Power &amp; Torque<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\" id=\"vc-field-power\">\n                <label class=\"vc-label\" for=\"vc-power\">Power <span class=\"vc-label-hint\">(kW)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-power\" inputmode=\"decimal\" step=\"any\" min=\"0\" placeholder=\"e.g. 15\" value=\"15\">\n            <\/div>\n            <div class=\"vc-field\" id=\"vc-field-speed\">\n                <label class=\"vc-label\" for=\"vc-speed\">Rotational Speed <span class=\"vc-label-hint\">(RPM)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-speed\" inputmode=\"decimal\" step=\"any\" min=\"0\" placeholder=\"e.g. 1500\" value=\"1500\">\n            <\/div>\n            <div class=\"vc-field\" id=\"vc-field-torque\" style=\"display:none;\">\n                <label class=\"vc-label\" for=\"vc-torque\">Torque <span class=\"vc-label-hint\">(Nm)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-torque\" inputmode=\"decimal\" step=\"any\" min=\"0\" placeholder=\"e.g. 100\" value=\"100\">\n            <\/div>\n        <\/div>\n\n        <!-- Presets -->\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Quick presets<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-solve=\"torque\" data-p=\"15\" data-n=\"1500\" data-t=\"\">15 kW @ 1500 RPM<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-solve=\"torque\" data-p=\"7.5\" data-n=\"3000\" data-t=\"\">7.5 kW @ 3000 RPM<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-solve=\"power\" data-p=\"\" data-n=\"750\" data-t=\"100\">100 Nm @ 750 RPM<\/button>\n        <\/div>\n    <\/form>\n\n    <!-- Results -->\n    <div class=\"vc-results\" id=\"vc-results\">\n        <div class=\"vc-results-head\">\n            <h2 class=\"vc-results-title\">Results<\/h2>\n            <button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\">\n                <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg>\n                Copy\n            <\/button>\n        <\/div>\n        <div class=\"vc-result-grid\">\n            <div class=\"vc-rcard vc-rcard-primary\">\n                <div class=\"vc-rcard-label\" id=\"vc-r-primary-label\">Calculated Value<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-primary\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Torque<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-torque\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Power<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-power\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Speed<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-speed\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Angular Velocity \u03c9<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-omega\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Power (Imperial)<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-hp\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Torque (Imperial)<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-ftlbf\">\u2014<\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- Theory & Reference -->\n<div class=\"vc-section vc-open\" id=\"vc-sec-theory\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\">\n        <span class=\"vc-section-toggle-text\">\n            <span class=\"vc-section-icon\">\ud83d\udcd8<\/span>\n            <span class=\"vc-section-title\">Theory &amp; Formulas<\/span>\n        <\/span>\n        <svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner vc-theory\">\n            <h3>Fundamental Relationship<\/h3>\n            <p>The relationship between power, torque, and rotational speed is:<\/p>\n            <div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n            <p>Where \u03c9 = 2\u03c0n\/60 is the angular velocity in rad\/s, and n is speed in RPM.<\/p>\n\n            <h3>Practical Formulas (with constant 9549)<\/h3>\n            <p>Substituting and rearranging for each unknown, using the constant 9549 \u2248 60000\/(2\u03c0):<\/p>\n            <div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\n            <div class=\"vc-formula-box\" id=\"vc-katex-3\"><\/div>\n            <div class=\"vc-formula-box\" id=\"vc-katex-4\"><\/div>\n\n            <h3>Unit Conversions<\/h3>\n            <table class=\"vc-table\">\n                <thead><tr><th>From<\/th><th>To<\/th><th>Factor<\/th><\/tr><\/thead>\n                <tbody>\n                    <tr><td>kW<\/td><td>hp (mechanical)<\/td><td>\u00d7 1.341<\/td><\/tr>\n                    <tr><td>hp<\/td><td>kW<\/td><td>\u00d7 0.7457<\/td><\/tr>\n                    <tr><td>Nm<\/td><td>ft\u00b7lbf<\/td><td>\u00d7 0.7376<\/td><\/tr>\n                    <tr><td>ft\u00b7lbf<\/td><td>Nm<\/td><td>\u00d7 1.3558<\/td><\/tr>\n                    <tr><td>RPM<\/td><td>rad\/s<\/td><td>\u00d7 2\u03c0\/60<\/td><\/tr>\n                <\/tbody>\n            <\/table>\n\n            <h3>Practical Example<\/h3>\n            <div class=\"vc-example-box\">\n                <div class=\"vc-example-title\">Example \u2014 15 kW motor at 1500 RPM<\/div>\n                <p><strong>Given:<\/strong> P = 15 kW, n = 1500 RPM<\/p>\n                <p>T = 9549 \u00d7 15 \/ 1500 = <strong>95.49 Nm<\/strong><\/p>\n                <p>\u03c9 = 2\u03c0 \u00d7 1500 \/ 60 = <strong>157.08 rad\/s<\/strong><\/p>\n                <p>Power in hp: 15 \u00d7 1.341 = <strong>20.12 hp<\/strong><\/p>\n                <p>Torque in ft\u00b7lbf: 95.49 \u00d7 0.7376 = <strong>70.44 ft\u00b7lbf<\/strong><\/p>\n            <\/div>\n\n            <div class=\"vc-info-box\">\n                <p><strong>\ud83d\udca1 The 9549 constant:<\/strong> This convenient number equals 60000\/(2\u03c0) \u2248 9549.2966. It eliminates the need to convert RPM to rad\/s explicitly. It works when power is in kW, torque in Nm, and speed in RPM.<\/p>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- Related Calculators -->\n<div class=\"vc-section\" id=\"vc-sec-related\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\">\n        <span class=\"vc-section-toggle-text\">\n            <span class=\"vc-section-icon\">\ud83d\udd17<\/span>\n            <span class=\"vc-section-title\">Related Calculators<\/span>\n        <\/span>\n        <svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner\">\n            <div class=\"vc-related\">\n                <a class=\"vc-related-link\" href=\"\/calculators\/bearing-internal-clearance\/\">Bearing Internal Clearance<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/bearing-heating-temperature\/\">Bearing Heating Temperature<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/residual-unbalance-iso1940\/\">Residual Unbalance (ISO 1940)<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/vibration-velocity\/\">Vibration Velocity (ISO 10816)<\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- FAQ -->\n<div class=\"vc-section\" id=\"vc-sec-faq\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\">\n        <span class=\"vc-section-toggle-text\">\n            <span class=\"vc-section-icon\">\u2753<\/span>\n            <span class=\"vc-section-title\">Frequently Asked Questions<\/span>\n        <\/span>\n        <svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner\">\n            <div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- Promo -->\n<div class=\"vc-promo\">\n    <div class=\"vc-promo-text\">\n        <strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>\n        Professional field balancing instruments and software. Achieve ISO compliance on-site. Used in 50+ countries.\n    <\/div>\n    <a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a>\n<\/div>\n\n<!-- Footer -->\n<footer class=\"vc-footer\">\n    <p>&copy; 2024\u20132025 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/p>\n    <p style=\"font-size:12px;margin-top:4px;\">Torque \u2014 Power \u2014 Speed reference. Last updated: February 2025<\/p>\n    <div class=\"vc-footer-links\">\n        <a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a>\n        <a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a>\n    <\/div>\n<\/footer>\n\n<\/div>\n\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\n<script>\n(function() {\n    'use strict';\n\n    var SLUG = 'torque-power-speed';\n    var C = 9549.2966; \/\/ 60000 \/ (2\u03c0)\n    var KW2HP = 1.34102;\n    var NM2FTLBF = 0.73756;\n\n    function $(id) { return document.getElementById(id); }\n    function fmt(n, d) { if(isNaN(n)||!isFinite(n)) return '\u2014'; var f=n.toFixed(d===undefined?2:d); return f.replace(\/(\\.\\d*?)0+$\/,'$1').replace(\/\\.$\/,''); }\n\n    \/* \u2500\u2500 SHOW\/HIDE FIELDS \u2500\u2500 *\/\n    function updateFields() {\n        var solve = $('vc-solve').value;\n        var showPower = (solve !== 'power');\n        var showSpeed = (solve !== 'speed');\n        var showTorque = (solve !== 'torque');\n\n        $('vc-field-power').style.display = showPower ? '' : 'none';\n        $('vc-field-speed').style.display = showSpeed ? '' : 'none';\n        $('vc-field-torque').style.display = showTorque ? '' : 'none';\n\n        \/\/ Reset disabled states\n        $('vc-power').disabled = false;\n        $('vc-speed').disabled = false;\n        $('vc-torque').disabled = false;\n    }\n\n    \/* \u2500\u2500 CALCULATION \u2500\u2500 *\/\n    function calculate() {\n        var solve = $('vc-solve').value;\n        var T, P, n;\n\n        if (solve === 'torque') {\n            P = parseFloat($('vc-power').value);\n            n = parseFloat($('vc-speed').value);\n            if (!P || P <= 0 || !n || n <= 0) { $('vc-results').classList.remove('vc-visible'); return; }\n            T = C * P \/ n;\n        } else if (solve === 'power') {\n            T = parseFloat($('vc-torque').value);\n            n = parseFloat($('vc-speed').value);\n            if (!T || T <= 0 || !n || n <= 0) { $('vc-results').classList.remove('vc-visible'); return; }\n            P = T * n \/ C;\n        } else { \/\/ speed\n            P = parseFloat($('vc-power').value);\n            T = parseFloat($('vc-torque').value);\n            if (!P || P <= 0 || !T || T <= 0) { $('vc-results').classList.remove('vc-visible'); return; }\n            n = C * P \/ T;\n        }\n\n        var omega = 2 * Math.PI * n \/ 60;\n        var hp = P * KW2HP;\n        var ftlbf = T * NM2FTLBF;\n\n        \/\/ Primary result label and value\n        if (solve === 'torque') {\n            $('vc-r-primary-label').textContent = 'Calculated Torque';\n            $('vc-r-primary').innerHTML = fmt(T, T < 10 ? 3 : 2) + ' <span class=\"vc-rcard-unit\">Nm<\/span>';\n        } else if (solve === 'power') {\n            $('vc-r-primary-label').textContent = 'Calculated Power';\n            $('vc-r-primary').innerHTML = fmt(P, P < 10 ? 3 : 2) + ' <span class=\"vc-rcard-unit\">kW<\/span>';\n        } else {\n            $('vc-r-primary-label').textContent = 'Calculated Speed';\n            $('vc-r-primary').innerHTML = fmt(n, n < 10 ? 2 : 1) + ' <span class=\"vc-rcard-unit\">RPM<\/span>';\n        }\n\n        \/\/ All three values\n        $('vc-r-torque').innerHTML = fmt(T, T < 10 ? 3 : 2) + ' <span class=\"vc-rcard-unit\">Nm<\/span>';\n        $('vc-r-power').innerHTML = fmt(P, P < 10 ? 3 : 2) + ' <span class=\"vc-rcard-unit\">kW<\/span>';\n        $('vc-r-speed').innerHTML = fmt(n, n < 10 ? 2 : 1) + ' <span class=\"vc-rcard-unit\">RPM<\/span>';\n        $('vc-r-omega').innerHTML = fmt(omega, 2) + ' <span class=\"vc-rcard-unit\">rad\/s<\/span>';\n        $('vc-r-hp').innerHTML = fmt(hp, 2) + ' <span class=\"vc-rcard-unit\">hp<\/span>';\n        $('vc-r-ftlbf').innerHTML = fmt(ftlbf, 2) + ' <span class=\"vc-rcard-unit\">ft\u00b7lbf<\/span>';\n\n        $('vc-results').classList.add('vc-visible');\n\n        \/\/ URL params\n        var u = new URL(window.location);\n        u.searchParams.set('solve', solve);\n        if (solve === 'torque') { u.searchParams.set('power', P); u.searchParams.set('speed', n); u.searchParams.delete('torque'); }\n        else if (solve === 'power') { u.searchParams.set('torque', T); u.searchParams.set('speed', n); u.searchParams.delete('power'); }\n        else { u.searchParams.set('power', P); u.searchParams.set('torque', T); u.searchParams.delete('speed'); }\n        history.replaceState(null, '', u.toString());\n\n        \/\/ History\n        saveHistory({\n            solve: solve, T: fmt(T,2), P: fmt(P,2), n: fmt(n,1),\n            _summary: 'T=' + fmt(T,2) + ' Nm, P=' + fmt(P,2) + ' kW, n=' + fmt(n,1) + ' RPM'\n        });\n    }\n\n    \/* \u2500\u2500 SOLVE MODE CHANGE \u2500\u2500 *\/\n    $('vc-solve').addEventListener('change', function() {\n        updateFields();\n        calculate();\n    });\n\n    \/* \u2500\u2500 PRESETS \u2500\u2500 *\/\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn) {\n        btn.addEventListener('click', function(e) {\n            e.preventDefault();\n            var solve = this.getAttribute('data-solve');\n            $('vc-solve').value = solve;\n            updateFields();\n            if (this.getAttribute('data-p')) $('vc-power').value = this.getAttribute('data-p');\n            if (this.getAttribute('data-n')) $('vc-speed').value = this.getAttribute('data-n');\n            if (this.getAttribute('data-t')) $('vc-torque').value = this.getAttribute('data-t');\n            calculate();\n        });\n    });\n\n    \/* \u2500\u2500 AUTO-CALCULATE \u2500\u2500 *\/\n    $('vc-form').addEventListener('input', calculate);\n    $('vc-form').addEventListener('change', calculate);\n\n    \/* \u2500\u2500 COPY \u2500\u2500 *\/\n    $('vc-copy-btn').addEventListener('click', function() {\n        var text = 'Torque \u2014 Power \u2014 Speed\\n' +\n            '\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\n' +\n            'Torque: ' + $('vc-r-torque').textContent + '\\n' +\n            'Power: ' + $('vc-r-power').textContent + '\\n' +\n            'Speed: ' + $('vc-r-speed').textContent + '\\n' +\n            'Angular velocity: ' + $('vc-r-omega').textContent + '\\n' +\n            'Power (imperial): ' + $('vc-r-hp').textContent + '\\n' +\n            'Torque (imperial): ' + $('vc-r-ftlbf').textContent + '\\n' +\n            '\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\n' +\n            'vibromera.eu\/calculators\/torque-power-speed\/';\n\n        if (navigator.clipboard) {\n            navigator.clipboard.writeText(text).then(function() {\n                var btn = $('vc-copy-btn');\n                btn.classList.add('vc-copied');\n                btn.innerHTML = '<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><polyline points=\"20 6 9 17 4 12\"\/><\/svg> Copied!';\n                setTimeout(function() {\n                    btn.classList.remove('vc-copied');\n                    btn.innerHTML = '<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy';\n                }, 2000);\n            });\n        }\n    });\n\n    \/* \u2500\u2500 COLLAPSIBLE SECTIONS \u2500\u2500 *\/\n    document.querySelectorAll('.vc-section-toggle').forEach(function(btn) {\n        btn.addEventListener('click', function() {\n            var section = this.closest('.vc-section');\n            var isOpen = section.classList.contains('vc-open');\n            section.classList.toggle('vc-open');\n            this.setAttribute('aria-expanded', !isOpen);\n        });\n    });\n\n    \/* \u2500\u2500 FAQ \u2500\u2500 *\/\n    var faqData = [\n        { q: 'How do I calculate torque from power and speed?', a: '<p>Use the formula: <strong>T = 9549 \u00d7 P \/ n<\/strong><\/p><ul><li>T = torque in Nm<\/li><li>P = power in kW<\/li><li>n = speed in RPM<\/li><\/ul><p>This is derived from the fundamental relationship P = T \u00d7 \u03c9, where \u03c9 = 2\u03c0n\/60 is the angular velocity in rad\/s.<\/p>' },\n        { q: 'What is the relationship between kW and Nm?', a: '<p>Power (kW) and torque (Nm) are related through rotational speed:<\/p><p><strong>P = T \u00d7 n \/ 9549<\/strong><\/p><p>Key insights:<\/p><ul><li>At constant speed, power is directly proportional to torque<\/li><li>At constant power, torque is inversely proportional to speed<\/li><li>Doubling the speed at constant power halves the torque<\/li><\/ul>' },\n        { q: 'What is the 9549 constant?', a: '<p>The constant 9549 (more precisely 9549.2966...) is a convenient conversion factor:<\/p><p><strong>9549 = 60000 \/ (2\u03c0)<\/strong><\/p><p>It arises from converting RPM to rad\/s and watts to kilowatts simultaneously. Using it avoids the need to manually calculate \u03c9 = 2\u03c0n\/60 and convert kW to W.<\/p>' },\n        { q: 'How do I convert kW to hp?', a: '<p>Multiply kW by 1.341 to get mechanical (imperial) horsepower:<\/p><ul><li><strong>1 kW = 1.341 hp<\/strong><\/li><li><strong>1 hp = 0.7457 kW<\/strong><\/li><\/ul><p>Note: Metric horsepower (PS\/CV) is slightly different: 1 PS = 0.7355 kW. The calculator uses mechanical (imperial) horsepower.<\/p>' },\n        { q: 'Does torque change with speed?', a: '<p>For a given power output, yes \u2014 torque and speed are inversely proportional: <strong>T = 9549 \u00d7 P \/ n<\/strong>.<\/p><p>However, actual machine behavior varies:<\/p><ul><li><strong>AC induction motors<\/strong> have nearly constant torque up to rated speed, then torque drops at higher speeds (constant power region)<\/li><li><strong>DC motors<\/strong> can deliver constant torque over a wide speed range with proper control<\/li><li><strong>Combustion engines<\/strong> have peak torque at a specific RPM, with the torque curve varying by design<\/li><\/ul>' }\n    ];\n\n    var faqList = $('vc-faq-list');\n    faqData.forEach(function(faq) {\n        faqList.innerHTML += '<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>' + faq.q + '<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">' + faq.a + '<\/div><\/div><\/div>';\n    });\n    faqList.addEventListener('click', function(e) {\n        var btn = e.target.closest('.vc-faq-q');\n        if (!btn) return;\n        btn.closest('.vc-faq-item').classList.toggle('vc-open');\n    });\n\n    \/* \u2500\u2500 HISTORY \u2500\u2500 *\/\n    function saveHistory(entry) {\n        var key = 'vc_history_' + SLUG;\n        var arr = [];\n        try { arr = JSON.parse(localStorage.getItem(key)) || []; } catch(e) {}\n        entry._ts = new Date().toISOString();\n        arr.unshift(entry);\n        if (arr.length > 10) arr = arr.slice(0, 10);\n        try { localStorage.setItem(key, JSON.stringify(arr)); } catch(e) {}\n    }\n\n    \/* \u2500\u2500 URL PARAMS \u2500\u2500 *\/\n    function loadParams() {\n        var p = new URLSearchParams(window.location.search);\n        if (p.get('solve')) $('vc-solve').value = p.get('solve');\n        if (p.get('power')) $('vc-power').value = p.get('power');\n        if (p.get('speed')) $('vc-speed').value = p.get('speed');\n        if (p.get('torque')) $('vc-torque').value = p.get('torque');\n    }\n\n    \/* \u2500\u2500 KATEX \u2500\u2500 *\/\n    function renderFormulas() {\n        try {\n            katex.render('P = T \\\\times \\\\omega = T \\\\times \\\\frac{2\\\\pi n}{60} \\\\quad [\\\\text{W}]', $('vc-katex-1'), { displayMode: true, throwOnError: false });\n            katex.render('T = \\\\frac{9549 \\\\times P}{n} \\\\quad [\\\\text{Nm}]', $('vc-katex-2'), { displayMode: true, throwOnError: false });\n            katex.render('P = \\\\frac{T \\\\times n}{9549} \\\\quad [\\\\text{kW}]', $('vc-katex-3'), { displayMode: true, throwOnError: false });\n            katex.render('n = \\\\frac{9549 \\\\times P}{T} \\\\quad [\\\\text{RPM}]', $('vc-katex-4'), { displayMode: true, throwOnError: false });\n        } catch(e) {}\n    }\n\n    \/* \u2500\u2500 INIT \u2500\u2500 *\/\n    function init() {\n        loadParams();\n        updateFields();\n        renderFormulas();\n        calculate();\n    }\n\n    if (document.readyState === 'loading') {\n        document.addEventListener('DOMContentLoaded', init);\n    } else {\n        init();\n    }\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Gratis online kalkulator for \u00e5 konvertere mellom dreiemoment (Nm), effekt (kW) og rotasjonshastighet (RPM). Gitt to vilk\u00e5rlige verdier, beregn den tredje. Inkluderer hk og ft\u00b7lbf-konverteringer.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100266","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100266\/revisions"}],"predecessor-version":[{"id":100578,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100266\/revisions\/100578"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/media?parent=100266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/categories?post=100266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/tags?post=100266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}