{"id":100054,"date":"2026-02-15T20:09:32","date_gmt":"2026-02-15T20:09:32","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100054"},"modified":"2026-06-25T23:30:35","modified_gmt":"2026-06-25T23:30:35","slug":"centrifuge-g-force","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/nb\/calculators\/centrifuge-g-force\/","title":{"rendered":"Sentrifuge G-Force (RCF) Kalkulator | RPM til g"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Centrifuge G-Force (RCF) Calculator\",\"alternateName\":[\"RPM to G Calculator\",\"RCF Calculator\",\"Centrifuge Speed Calculator\"],\"description\":\"Free online calculator to convert centrifuge RPM to relative centrifugal force (RCF \/ \u00d7g) or calculate RPM from desired RCF. Includes tip speed and angular velocity output.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/centrifuge-g-force\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any (Web Browser)\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2025-01-01\",\"dateModified\":\"2026-02-15\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true,\"featureList\":[\"RPM to RCF conversion\",\"RCF to RPM conversion\",\"Bidirectional mode toggle\",\"Tip speed calculation\",\"Angular velocity output\",\"Preset configurations\"],\"keywords\":\"centrifuge, g-force, RCF, RPM, ultracentrifuge, relative centrifugal force\"}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"What is RCF (relative centrifugal force)?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"RCF is the effective force applied to the sample in a centrifuge, expressed as multiples of gravitational acceleration (\u00d7g). RCF = 1.118 \u00d7 10\u207b\u2076 \u00d7 n\u00b2 \u00d7 R, where n is RPM and R is rotor radius in mm. Unlike RPM, RCF accounts for rotor size, making it comparable across different centrifuges.\"}},\n{\"@type\":\"Question\",\"name\":\"Why should I use RCF instead of RPM in protocols?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"RPM alone doesn't specify the actual force on the sample \u2014 it depends on rotor radius. Two centrifuges at the same RPM but different rotor sizes produce different g-forces. Scientific protocols specify RCF (\u00d7g) to ensure reproducible results regardless of the centrifuge model used.\"}},\n{\"@type\":\"Question\",\"name\":\"What radius should I use \u2014 maximum, minimum, or average?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Use the maximum radius (r_max) \u2014 the distance from the rotation axis to the bottom of the sample tube \u2014 for the reported RCF. This gives the maximum g-force experienced by the sample. Some protocols specify r_avg (average) for sedimentation calculations.\"}},\n{\"@type\":\"Question\",\"name\":\"What g-forces do different centrifuges achieve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Typical ranges: benchtop microcentrifuges up to 20,000 \u00d7g, general lab centrifuges 3,000\u201315,000 \u00d7g, high-speed centrifuges 25,000\u2013100,000 \u00d7g, ultracentrifuges up to 1,000,000 \u00d7g. Industrial separators typically operate at 1,000\u201310,000 \u00d7g.\"}},\n{\"@type\":\"Question\",\"name\":\"How do I convert g-force back to RPM?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Use the reverse formula: n = \u221a(RCF \/ (1.118 \u00d7 10\u207b\u2076 \u00d7 R)), where RCF is the desired g-force and R is rotor radius in mm. This calculator supports both directions \u2014 toggle between 'RPM \u2192 RCF' and 'RCF \u2192 RPM' modes.\"}}\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\":\"Centrifuge G-Force Calculator\",\"item\":\"https:\/\/vibromera.eu\/calculators\/centrifuge-g-force\/\"}\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 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16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}\n@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}\n<\/style>\n\n<div class=\"vc-calculator\" id=\"vc-centrifuge-gforce\">\n\n<header class=\"vc-header\">\n    <p class=\"vc-header-eyebrow\">Free Engineering Tool<\/p>\n    <h1 class=\"vc-header-title\">Centrifuge G-Force (RCF) Calculator<\/h1>\n    <p class=\"vc-header-subtitle\">Convert centrifuge RPM to relative centrifugal force (\u00d7g), or calculate RPM from desired RCF. Includes tip speed and angular velocity.<\/p>\n    <div class=\"vc-badges\">\n        <span class=\"vc-badge\">RPM \u2192 RCF<\/span>\n        <span class=\"vc-badge\">RCF \u2192 RPM<\/span>\n        <span class=\"vc-badge\">Tip Speed<\/span>\n    <\/div>\n<\/header>\n\n<div class=\"vc-card\">\n    <div class=\"vc-unit-bar\">\n        <button type=\"button\" class=\"vc-unit-btn vc-active\" data-mode=\"rpm2rcf\">RPM \u2192 RCF (g-force)<\/button>\n        <button type=\"button\" class=\"vc-unit-btn\" data-mode=\"rcf2rpm\">RCF (g-force) \u2192 RPM<\/button>\n    <\/div>\n\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\n        <div class=\"vc-form-grid\">\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-radius\">Rotor Radius R <span class=\"vc-label-hint\">(mm, center to sample)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-radius\" inputmode=\"decimal\" step=\"any\" min=\"1\" placeholder=\"e.g. 100\" value=\"100\">\n            <\/div>\n            <div class=\"vc-field\" id=\"vc-field-speed\">\n                <label class=\"vc-label\" for=\"vc-speed\">Speed <span class=\"vc-label-hint\">(RPM)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-speed\" inputmode=\"decimal\" step=\"any\" min=\"1\" placeholder=\"e.g. 5000\" value=\"5000\">\n            <\/div>\n            <div class=\"vc-field\" id=\"vc-field-rcf\" style=\"display:none;\">\n                <label class=\"vc-label\" for=\"vc-rcf\">Desired RCF <span class=\"vc-label-hint\">(\u00d7g)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-rcf\" inputmode=\"decimal\" step=\"any\" min=\"1\" placeholder=\"e.g. 3000\" value=\"3000\">\n            <\/div>\n        <\/div>\n\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Quick presets<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-r=\"100\" data-s=\"5000\">Lab centrifuge R=100mm 5000RPM<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-r=\"80\" data-s=\"50000\">Ultracentrifuge R=80mm 50000RPM<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-r=\"250\" data-s=\"3000\">Industrial R=250mm 3000RPM<\/button>\n        <\/div>\n    <\/form>\n\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\">Relative Centrifugal Force (RCF)<\/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\">RPM<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-rpm\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Tip Speed<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-tipspeed\">\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>\n    <\/div>\n<\/div>\n\n<!-- Theory -->\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>Relative Centrifugal Force (RCF)<\/h3>\n            <p>RCF is the effective force on the sample expressed as multiples of gravitational acceleration:<\/p>\n            <div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n            <ul>\n                <li><strong>n<\/strong> \u2014 speed (RPM)<\/li>\n                <li><strong>R<\/strong> \u2014 rotor radius in mm (center of rotation to sample position)<\/li>\n                <li><strong>1.118 \u00d7 10\u207b\u2076<\/strong> \u2014 combined constant from (2\u03c0\/60)\u00b2\/(9.81\u00d71000)<\/li>\n            <\/ul>\n\n            <h3>Reverse: RPM from RCF<\/h3>\n            <div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\n\n            <h3>Typical RCF Values<\/h3>\n            <table class=\"vc-table\">\n                <thead><tr><th>Application<\/th><th>Typical RCF (\u00d7g)<\/th><th>Typical RPM<\/th><\/tr><\/thead>\n                <tbody>\n                    <tr><td>Blood separation<\/td><td>1,000\u20133,000<\/td><td>2,000\u20135,000<\/td><\/tr>\n                    <tr><td>Cell pelleting<\/td><td>300\u2013500<\/td><td>1,000\u20132,000<\/td><\/tr>\n                    <tr><td>Protein precipitation<\/td><td>10,000\u201320,000<\/td><td>10,000\u201315,000<\/td><\/tr>\n                    <tr><td>Subcellular fractionation<\/td><td>20,000\u2013100,000<\/td><td>15,000\u201350,000<\/td><\/tr>\n                    <tr><td>Ultracentrifugation<\/td><td>100,000\u20131,000,000<\/td><td>40,000\u2013100,000<\/td><\/tr>\n                    <tr><td>Industrial separators<\/td><td>1,000\u201310,000<\/td><td>3,000\u201310,000<\/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 Lab Centrifuge<\/div>\n                <p><strong>Given:<\/strong> R = 100 mm, Speed = 5000 RPM<\/p>\n                <p>RCF = 1.118 \u00d7 10\u207b\u2076 \u00d7 5000\u00b2 \u00d7 100 = <strong>2,795 \u00d7g<\/strong><\/p>\n                <p>\u03c9 = 2\u03c0 \u00d7 5000 \/ 60 = 523.6 rad\/s<\/p>\n                <p>Tip speed = 0.1 \u00d7 523.6 = <strong>52.4 m\/s<\/strong><\/p>\n            <\/div>\n\n            <div class=\"vc-info-box\">\n                <p><strong>\ud83d\udca1 Tip:<\/strong> Always report centrifuge conditions as RCF (\u00d7g) in scientific protocols, not RPM. This ensures reproducibility across different centrifuge models with different rotor sizes.<\/p>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- Related -->\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=\"\/separator-balancing.html\">Separator Balancing<\/a>\n                <a class=\"vc-related-link\" href=\"\/residual-unbalance-iso1940.html\">Residual Unbalance (ISO 21940)<\/a>\n                <a class=\"vc-related-link\" href=\"\/fan-blade-centrifugal-force.html\">Fan Blade Centrifugal Force<\/a>\n                <a class=\"vc-related-link\" href=\"\/spindle-unbalance.html\">Spindle Unbalance<\/a>\n                <a class=\"vc-related-link\" href=\"\/propeller-unbalance.html\">Propeller Unbalance<\/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<div class=\"vc-promo\">\n    <div class=\"vc-promo-text\">\n        <strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>\n        Professional vibration analysis and balancing instruments for centrifuges, separators, and all rotating machinery.\n    <\/div>\n    <a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a>\n<\/div>\n\n<footer class=\"vc-footer\">\n    <p>\u00a9 2024\u20132026 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/p>\n    <p style=\"font-size:12px;margin-top:4px;\">Calculator #245. Last updated: February 2026<\/p>\n    <div class=\"vc-footer-links\">\n        <a href=\"\/index.html\">All Calculators<\/a>\n        <a href=\"https:\/\/vibromera.eu\/contact\/\">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    var SLUG = 'centrifuge-g-force';\n    var mode = 'rpm2rcf'; \/\/ or 'rcf2rpm'\n    var FACTOR = 1.118e-6;\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    function calculate() {\n        var R = parseFloat($('vc-radius').value);\n        if (!R || R <= 0) { $('vc-results').classList.remove('vc-visible'); return; }\n\n        var rpm, rcf, omega, tipSpeed;\n\n        if (mode === 'rpm2rcf') {\n            rpm = parseFloat($('vc-speed').value);\n            if (!rpm || rpm <= 0) { $('vc-results').classList.remove('vc-visible'); return; }\n            rcf = FACTOR * rpm * rpm * R;\n            omega = 2 * Math.PI * rpm \/ 60;\n            tipSpeed = (R \/ 1000) * omega;\n\n            $('vc-r-primary-label').textContent = 'Relative Centrifugal Force (RCF)';\n            $('vc-r-primary').innerHTML = fmt(rcf, rcf < 100 ? 1 : 0) + ' <span class=\"vc-rcard-unit\">\u00d7g<\/span>';\n            $('vc-r-rpm').innerHTML = fmt(rpm, 0) + ' <span class=\"vc-rcard-unit\">RPM<\/span>';\n        } else {\n            rcf = parseFloat($('vc-rcf').value);\n            if (!rcf || rcf <= 0) { $('vc-results').classList.remove('vc-visible'); return; }\n            rpm = Math.sqrt(rcf \/ (FACTOR * R));\n            omega = 2 * Math.PI * rpm \/ 60;\n            tipSpeed = (R \/ 1000) * omega;\n\n            $('vc-r-primary-label').textContent = 'Required Speed';\n            $('vc-r-primary').innerHTML = fmt(rpm, 0) + ' <span class=\"vc-rcard-unit\">RPM<\/span>';\n            $('vc-r-rpm').innerHTML = fmt(rcf, rcf < 100 ? 1 : 0) + ' <span class=\"vc-rcard-unit\">\u00d7g (RCF)<\/span>';\n        }\n\n        $('vc-r-tipspeed').innerHTML = fmt(tipSpeed, 1) + ' <span class=\"vc-rcard-unit\">m\/s<\/span>';\n        $('vc-r-omega').innerHTML = fmt(omega, 1) + ' <span class=\"vc-rcard-unit\">rad\/s<\/span>';\n\n        $('vc-results').classList.add('vc-visible');\n\n        var u = new URL(window.location);\n        u.searchParams.set('radius', R); u.searchParams.set('mode', mode);\n        if (mode === 'rpm2rcf') u.searchParams.set('speed', rpm);\n        else u.searchParams.set('rcf', rcf);\n        history.replaceState(null, '', u.toString());\n\n        saveHistory({ radius:R, rpm:rpm, rcf:rcf, mode:mode,\n            _summary: 'R=' + R + 'mm, ' + (mode === 'rpm2rcf' ? rpm + 'RPM \u2192 ' + fmt(rcf,0) + '\u00d7g' : fmt(rcf,0) + '\u00d7g \u2192 ' + fmt(rpm,0) + 'RPM') });\n    }\n\n    \/\/ Mode toggle\n    var unitBtns = document.querySelectorAll('.vc-unit-btn');\n    unitBtns.forEach(function(btn) {\n        btn.addEventListener('click', function() {\n            unitBtns.forEach(function(b) { b.classList.remove('vc-active'); });\n            this.classList.add('vc-active');\n            mode = this.getAttribute('data-mode');\n            if (mode === 'rpm2rcf') {\n                $('vc-field-speed').style.display = '';\n                $('vc-field-rcf').style.display = 'none';\n            } else {\n                $('vc-field-speed').style.display = 'none';\n                $('vc-field-rcf').style.display = '';\n            }\n            calculate();\n        });\n    });\n\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn) {\n        btn.addEventListener('click', function(e) {\n            e.preventDefault();\n            \/\/ Switch to rpm2rcf mode for presets\n            mode = 'rpm2rcf';\n            unitBtns.forEach(function(b) { b.classList.toggle('vc-active', b.getAttribute('data-mode') === 'rpm2rcf'); });\n            $('vc-field-speed').style.display = '';\n            $('vc-field-rcf').style.display = 'none';\n            $('vc-radius').value = this.getAttribute('data-r');\n            $('vc-speed').value = this.getAttribute('data-s');\n            calculate();\n        });\n    });\n\n    $('vc-form').addEventListener('input', calculate);\n    $('vc-form').addEventListener('change', calculate);\n\n    $('vc-copy-btn').addEventListener('click', function() {\n        var text = 'Centrifuge G-Force Calculation\\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            'Radius: ' + $('vc-radius').value + ' mm\\n' +\n            'Result: ' + $('vc-r-primary').textContent + '\\n' +\n            'RPM \/ RCF: ' + $('vc-r-rpm').textContent + '\\n' +\n            'Tip Speed: ' + $('vc-r-tipspeed').textContent + '\\n' +\n            'Angular Velocity: ' + $('vc-r-omega').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\/centrifuge-g-force\/';\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() { btn.classList.remove('vc-copied'); 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'; }, 2000);\n            });\n        }\n    });\n\n    document.querySelectorAll('.vc-section-toggle').forEach(function(btn) {\n        btn.addEventListener('click', function() {\n            var section = this.closest('.vc-section');\n            section.classList.toggle('vc-open');\n            this.setAttribute('aria-expanded', section.classList.contains('vc-open'));\n        });\n    });\n\n    var faqData = [\n        { q: 'What is RCF (relative centrifugal force)?', a: '<p>RCF is the effective force on the sample in a centrifuge, expressed as multiples of gravitational acceleration (\u00d7g). RCF = 1.118 \u00d7 10\u207b\u2076 \u00d7 n\u00b2 \u00d7 R, where n is RPM and R is rotor radius in mm. Unlike RPM alone, RCF accounts for rotor size, making results comparable across centrifuges.<\/p>' },\n        { q: 'Why should I use RCF instead of RPM in protocols?', a: '<p>RPM alone doesn\\'t specify the actual force on the sample \u2014 it depends on rotor radius. Two centrifuges at the same RPM but different rotor sizes produce different g-forces. Always report RCF (\u00d7g) in scientific protocols for reproducible results.<\/p>' },\n        { q: 'What radius should I use \u2014 maximum, minimum, or average?', a: '<p>Use the <strong>maximum radius<\/strong> (r<sub>max<\/sub>) \u2014 the distance from the rotation axis to the bottom of the sample tube. This gives the maximum g-force experienced by the sample. Some sedimentation protocols specify r<sub>avg<\/sub> (average radius).<\/p>' },\n        { q: 'What g-forces do different centrifuges achieve?', a: '<p>Typical ranges:<\/p><ul><li><strong>Benchtop micro:<\/strong> up to 20,000 \u00d7g<\/li><li><strong>General lab:<\/strong> 3,000\u201315,000 \u00d7g<\/li><li><strong>High-speed:<\/strong> 25,000\u2013100,000 \u00d7g<\/li><li><strong>Ultracentrifuge:<\/strong> up to 1,000,000 \u00d7g<\/li><li><strong>Industrial separators:<\/strong> 1,000\u201310,000 \u00d7g<\/li><\/ul>' },\n        { q: 'How do I convert g-force back to RPM?', a: '<p>Use the reverse formula: n = \u221a(RCF \/ (1.118 \u00d7 10\u207b\u2076 \u00d7 R)), where RCF is the desired g-force and R is rotor radius in mm. Use the \"RCF \u2192 RPM\" mode toggle at the top of this calculator for automatic conversion.<\/p>' }\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) { var btn = e.target.closest('.vc-faq-q'); if (!btn) return; btn.closest('.vc-faq-item').classList.toggle('vc-open'); });\n\n    function saveHistory(entry) {\n        var key = 'vc_history_' + SLUG; var arr = [];\n        try { arr = JSON.parse(localStorage.getItem(key)) || []; } catch(e) {}\n        entry._ts = new Date().toISOString(); 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    function loadParams() {\n        var p = new URLSearchParams(window.location.search);\n        if (p.get('mode') === 'rcf2rpm') {\n            mode = 'rcf2rpm';\n            unitBtns.forEach(function(b) { b.classList.toggle('vc-active', b.getAttribute('data-mode') === 'rcf2rpm'); });\n            $('vc-field-speed').style.display = 'none';\n            $('vc-field-rcf').style.display = '';\n        }\n        p.forEach(function(v, k) {\n            if (k === 'mode') return;\n            var el = $(k) || $('vc-' + k); if (el) el.value = v;\n        });\n    }\n\n    function renderFormulas() {\n        try {\n            katex.render('\\\\text{RCF} = 1.118 \\\\times 10^{-6} \\\\times n^2 \\\\times R \\\\quad [\\\\times g]', $('vc-katex-1'), { displayMode: true, throwOnError: false });\n            katex.render('n = \\\\sqrt{\\\\frac{\\\\text{RCF}}{1.118 \\\\times 10^{-6} \\\\times R}} \\\\quad [\\\\text{RPM}]', $('vc-katex-2'), { displayMode: true, throwOnError: false });\n        } catch(e) {}\n    }\n\n    function init() { loadParams(); renderFormulas(); calculate(); }\n    if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', init); } else { init(); }\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Gratis online kalkulator for sentrifuge g-kraft (RCF). Konverter RPM til relativ sentrifugalkraft (\u00d7g) eller beregn RPM fra \u00f8nsket RCF. Inkluderer spisshastighet og vinkelhastighet.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100054","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100054","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":3,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100054\/revisions"}],"predecessor-version":[{"id":101981,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100054\/revisions\/101981"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/media?parent=100054"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/categories?post=100054"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/tags?post=100054"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}