{"id":100246,"date":"2026-02-15T20:29:31","date_gmt":"2026-02-15T20:29:31","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100246"},"modified":"2026-03-05T15:41:12","modified_gmt":"2026-03-05T15:41:12","slug":"strength-unit-converter","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/bn\/calculators\/strength-unit-converter\/","title":{"rendered":"Strength Unit Converter: MPa \u2194 ksi \u2194 PSI \u2194 GPa | Vibromera"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Strength Unit Converter\",\"description\":\"Free stress\/strength unit converter with 9+ units shown simultaneously. Material strength reference table.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/strength-unit-converter\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2024-01-01\",\"dateModified\":\"2025-06-01\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"How do I convert MPa to ksi?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"1 ksi = 6.89476 MPa. To convert MPa to ksi: divide by 6.89476. Example: 500 MPa = 72.5 ksi.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the difference between MPa and N\/mm\u00b2?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"They are identical. 1 MPa = 1 N\/mm\u00b2 = 1 MN\/m\u00b2. Both are commonly used in engineering for stress and strength values.\"}},\n{\"@type\":\"Question\",\"name\":\"How do I convert stress to force?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Force = Stress \u00d7 Area (F = \u03c3 \u00d7 A). For example, 500 MPa stress on a 100 mm\u00b2 cross-section: F = 500 \u00d7 100 = 50,000 N = 50 kN.\"}},\n{\"@type\":\"Question\",\"name\":\"What is kgf\/mm\u00b2 and when is it used?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Kilogram-force per square millimeter. An older metric unit still used in some Russian, Japanese, and older European standards. 1 kgf\/mm\u00b2 = 9.80665 MPa.\"}},\n{\"@type\":\"Question\",\"name\":\"What are typical steel strength values?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S235: Rp=235 MPa, Rm=360 MPa. S355: Rp=355 MPa, Rm=510 MPa. AISI 4140 Q&T: Rp=655 MPa, Rm=900 MPa. 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padding:24px!important; }\n    .vc-copy-btn, .vc-section-chevron, .vc-faq-chevron, .vc-presets, .vc-promo { display:none!important; }\n}\n<\/style>\n\n<div class=\"vc-calculator\" id=\"vc-strength-conv\">\n\n<header class=\"vc-header\">\n    <p class=\"vc-header-eyebrow\">Free Engineering Tool<\/p>\n    <h1 class=\"vc-header-title\">Strength Unit Converter<\/h1>\n    <p class=\"vc-header-subtitle\">Convert between 9 stress\/strength units instantly. Enter a value in any unit \u2014 see all conversions simultaneously. Includes stress-to-force calculator and material reference.<\/p>\n    <div class=\"vc-badges\">\n        <span class=\"vc-badge\">MPa<\/span>\n        <span class=\"vc-badge\">ksi<\/span>\n        <span class=\"vc-badge\">PSI<\/span>\n        <span class=\"vc-badge\">GPa<\/span>\n        <span class=\"vc-badge\">kgf\/mm\u00b2<\/span>\n        <span class=\"vc-badge\">bar<\/span>\n        <span class=\"vc-badge\">kPa<\/span>\n    <\/div>\n<\/header>\n\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\">\n                <label class=\"vc-label\" for=\"vc-value\">Value<\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-value\" step=\"any\" value=\"500\" placeholder=\"e.g. 500\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-unit\">From Unit<\/label>\n                <select class=\"vc-select\" id=\"vc-unit\">\n                    <option value=\"MPa\" selected>MPa (= N\/mm\u00b2)<\/option>\n                    <option value=\"kPa\">kPa<\/option>\n                    <option value=\"GPa\">GPa<\/option>\n                    <option value=\"ksi\">ksi (kip\/in\u00b2)<\/option>\n                    <option value=\"PSI\">PSI (lbf\/in\u00b2)<\/option>\n                    <option value=\"kgfmm2\">kgf\/mm\u00b2<\/option>\n                    <option value=\"kgfcm2\">kgf\/cm\u00b2<\/option>\n                    <option value=\"bar\">bar<\/option>\n                    <option value=\"Nmm2\">N\/mm\u00b2 (= MPa)<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-area\">Cross-section Area <span class=\"vc-label-hint\">(mm\u00b2) \u2014 for \u03c3\u2192F<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-area\" step=\"any\" value=\"100\" placeholder=\"e.g. 100\">\n            <\/div>\n        <\/div>\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Common material strengths<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-v=\"235\" data-u=\"MPa\">235 MPa \u2014 S235 yield<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-v=\"355\" data-u=\"MPa\">355 MPa \u2014 S355 yield<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-v=\"500\" data-u=\"MPa\">500 MPa \u2014 S355 UTS<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-v=\"36\" data-u=\"ksi\">36 ksi \u2014 A36 yield<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-v=\"210\" data-u=\"GPa\">210 GPa \u2014 Steel E<\/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\">All Units<\/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\"><div class=\"vc-rcard-label\">MPa (= N\/mm\u00b2)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-mpa\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\">ksi (kip\/in\u00b2)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-ksi\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\">PSI (lbf\/in\u00b2)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-psi\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">GPa<\/div><div class=\"vc-rcard-value\" id=\"vc-r-gpa\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">kPa<\/div><div class=\"vc-rcard-value\" id=\"vc-r-kpa\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">bar<\/div><div class=\"vc-rcard-value\" id=\"vc-r-bar\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">kgf\/mm\u00b2<\/div><div class=\"vc-rcard-value\" id=\"vc-r-kgfmm\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">kgf\/cm\u00b2<\/div><div class=\"vc-rcard-value\" id=\"vc-r-kgfcm\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Pa<\/div><div class=\"vc-rcard-value\" id=\"vc-r-pa\">\u2014<\/div><\/div>\n        <\/div>\n\n        <!-- Stress to Force -->\n        <div class=\"vc-force-calc\">\n            <h4>Stress \u2192 Force (F = \u03c3 \u00d7 A)<\/h4>\n            <div class=\"vc-force-grid\">\n                <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Force<\/div><div class=\"vc-rcard-value\" id=\"vc-r-force\" style=\"font-size:18px\">\u2014<\/div><\/div>\n                <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Force (kN)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-forcekn\" style=\"font-size:18px\">\u2014<\/div><\/div>\n                <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Force (tonnes-force)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-forcet\" style=\"font-size:18px\">\u2014<\/div><\/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\">Conversion Factors &amp; Material Reference<\/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>Conversion Relationships<\/h3>\n            <div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n            <div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\n\n            <h3>Stress to Force<\/h3>\n            <div class=\"vc-formula-box\" id=\"vc-katex-3\"><\/div>\n\n            <h3>Practical Example<\/h3>\n            <div class=\"vc-example-box\">\n                <div class=\"vc-example-title\">Example \u2014 Converting S355 yield stress<\/div>\n                <p><strong>Given:<\/strong> Rp0.2 = 355 MPa<\/p>\n                <p>= 355 N\/mm\u00b2 = 0.355 GPa = 355,000 kPa<\/p>\n                <p>= 355 \/ 6.895 = <strong>51.5 ksi<\/strong> = 51,488 PSI<\/p>\n                <p>= 355 \/ 9.807 = <strong>36.2 kgf\/mm\u00b2<\/strong><\/p>\n                <p>= 355 \u00d7 10 = <strong>3,550 bar<\/strong><\/p>\n                <p>Force on 200 mm\u00b2 bar: F = 355 \u00d7 200 = 71,000 N = <strong>71.0 kN<\/strong><\/p>\n            <\/div>\n\n            <h3>Material Strength Reference Table<\/h3>\n            <table class=\"vc-table\">\n                <thead><tr><th>Material<\/th><th>Standard<\/th><th>Rp0.2 (MPa)<\/th><th>Rm (MPa)<\/th><th>Rp (ksi)<\/th><th>Rm (ksi)<\/th><\/tr><\/thead>\n                <tbody>\n                    <tr><td>S235JR<\/td><td>EN 10025<\/td><td>235<\/td><td>360\u2013510<\/td><td>34.1<\/td><td>52\u201374<\/td><\/tr>\n                    <tr><td>S275JR<\/td><td>EN 10025<\/td><td>275<\/td><td>410\u2013560<\/td><td>39.9<\/td><td>59\u201381<\/td><\/tr>\n                    <tr><td>S355JR<\/td><td>EN 10025<\/td><td>355<\/td><td>470\u2013630<\/td><td>51.5<\/td><td>68\u201391<\/td><\/tr>\n                    <tr><td>P265GH<\/td><td>EN 10028<\/td><td>265<\/td><td>410\u2013530<\/td><td>38.4<\/td><td>59\u201377<\/td><\/tr>\n                    <tr><td>P355GH<\/td><td>EN 10028<\/td><td>355<\/td><td>490\u2013630<\/td><td>51.5<\/td><td>71\u201391<\/td><\/tr>\n                    <tr><td>A36<\/td><td>ASTM<\/td><td>250<\/td><td>400\u2013550<\/td><td>36<\/td><td>58\u201380<\/td><\/tr>\n                    <tr><td>A516 Gr.70<\/td><td>ASTM<\/td><td>260<\/td><td>485\u2013620<\/td><td>37.7<\/td><td>70\u201390<\/td><\/tr>\n                    <tr><td>304 SS<\/td><td>EN\/ASTM<\/td><td>210<\/td><td>520\u2013720<\/td><td>30.5<\/td><td>75\u2013104<\/td><\/tr>\n                    <tr><td>316L SS<\/td><td>EN\/ASTM<\/td><td>200<\/td><td>500\u2013700<\/td><td>29.0<\/td><td>73\u2013101<\/td><\/tr>\n                    <tr><td>42CrMo4 Q&#038;T<\/td><td>EN 10083<\/td><td>750<\/td><td>1000\u20131200<\/td><td>109<\/td><td>145\u2013174<\/td><\/tr>\n                    <tr><td>AISI 4140 Q&#038;T<\/td><td>ASTM<\/td><td>655<\/td><td>900\u20131100<\/td><td>95<\/td><td>131\u2013160<\/td><\/tr>\n                    <tr><td>Duplex 2205<\/td><td>EN\/ASTM<\/td><td>450<\/td><td>620\u2013880<\/td><td>65.3<\/td><td>90\u2013128<\/td><\/tr>\n                <\/tbody>\n            <\/table>\n\n            <div class=\"vc-info-box\">\n                <p><strong>\ud83d\udca1 Tip:<\/strong> 1 MPa = 1 N\/mm\u00b2 exactly. This is the most common unit for mechanical properties in international standards. In the US, ksi (= 1000 PSI) is standard.<\/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\"><span class=\"vc-section-icon\">\ud83d\udd17<\/span><span class=\"vc-section-title\">Related Calculators<\/span><\/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\/steel-properties-lookup\/\">Steel Properties<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/allowable-stress-by-material\/\">Allowable Stress<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/steel-grade-equivalent\/\">Steel Equivalents<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/density-mass-volume\/\">Density Calculator<\/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\"><span class=\"vc-section-icon\">\u2753<\/span><span class=\"vc-section-title\">Frequently Asked Questions<\/span><\/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\"><strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>Professional field balancing instruments and software. Used in 50+ countries.<\/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\u20132025 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/p>\n    <p style=\"font-size:12px;margin-top:4px;\">Last updated: June 2025<\/p>\n    <div class=\"vc-footer-links\"><a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a><a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a><\/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 = 'strength-unit-converter';\n    function $(id) { return document.getElementById(id); }\n    function fmt(n, d) {\n        if (isNaN(n) || !isFinite(n)) return '\u2014';\n        if (Math.abs(n) >= 1e6) return n.toExponential(3);\n        if (Math.abs(n) >= 10000) return Math.round(n).toLocaleString('en-US');\n        return Number(n.toPrecision(d || 6)).toString();\n    }\n\n    \/\/ All conversion factors TO MPa\n    var toMPa = {\n        MPa: 1, kPa: 0.001, GPa: 1000, ksi: 6.89476, PSI: 0.00689476,\n        kgfmm2: 9.80665, kgfcm2: 0.0980665, bar: 0.1, Nmm2: 1\n    };\n\n    function calculate() {\n        var v = parseFloat($('vc-value').value);\n        var u = $('vc-unit').value;\n        var area = parseFloat($('vc-area').value);\n\n        if (isNaN(v)) {\n            $('vc-results').classList.remove('vc-visible');\n            return;\n        }\n\n        var mpa = v * toMPa[u];\n\n        $('vc-r-mpa').innerHTML = fmt(mpa) + ' <span class=\"vc-rcard-unit\">MPa<\/span>';\n        $('vc-r-ksi').innerHTML = fmt(mpa \/ 6.89476) + ' <span class=\"vc-rcard-unit\">ksi<\/span>';\n        $('vc-r-psi').innerHTML = fmt(mpa \/ 0.00689476) + ' <span class=\"vc-rcard-unit\">PSI<\/span>';\n        $('vc-r-gpa').innerHTML = fmt(mpa \/ 1000) + ' <span class=\"vc-rcard-unit\">GPa<\/span>';\n        $('vc-r-kpa').innerHTML = fmt(mpa * 1000) + ' <span class=\"vc-rcard-unit\">kPa<\/span>';\n        $('vc-r-bar').innerHTML = fmt(mpa * 10) + ' <span class=\"vc-rcard-unit\">bar<\/span>';\n        $('vc-r-kgfmm').innerHTML = fmt(mpa \/ 9.80665) + ' <span class=\"vc-rcard-unit\">kgf\/mm\u00b2<\/span>';\n        $('vc-r-kgfcm').innerHTML = fmt(mpa \/ 0.0980665) + ' <span class=\"vc-rcard-unit\">kgf\/cm\u00b2<\/span>';\n        $('vc-r-pa').innerHTML = fmt(mpa * 1e6) + ' <span class=\"vc-rcard-unit\">Pa<\/span>';\n\n        \/\/ Stress to force\n        if (!isNaN(area) && area > 0) {\n            var forceN = mpa * area; \/\/ MPa \u00d7 mm\u00b2 = N\n            $('vc-r-force').innerHTML = fmt(forceN) + ' <span class=\"vc-rcard-unit\">N<\/span>';\n            $('vc-r-forcekn').innerHTML = fmt(forceN \/ 1000) + ' <span class=\"vc-rcard-unit\">kN<\/span>';\n            $('vc-r-forcet').innerHTML = fmt(forceN \/ 9806.65) + ' <span class=\"vc-rcard-unit\">tf<\/span>';\n        } else {\n            $('vc-r-force').textContent = '\u2014';\n            $('vc-r-forcekn').textContent = '\u2014';\n            $('vc-r-forcet').textContent = '\u2014';\n        }\n\n        $('vc-results').classList.add('vc-visible');\n\n        \/\/ URL params\n        try {\n            var url = new URL(window.location);\n            url.searchParams.set('v', v);\n            url.searchParams.set('u', u);\n            if (area > 0) url.searchParams.set('a', area);\n            history.replaceState(null, '', url.toString());\n        } catch (e) {}\n\n        \/\/ History\n        saveHistory({ value: v, unit: u, mpa: fmt(mpa), _summary: v + ' ' + u + ' = ' + fmt(mpa) + ' MPa' });\n    }\n\n    $('vc-form').addEventListener('input', calculate);\n    $('vc-form').addEventListener('change', calculate);\n\n    \/\/ Presets\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn) {\n        btn.addEventListener('click', function(e) {\n            e.preventDefault();\n            $('vc-value').value = this.getAttribute('data-v');\n            $('vc-unit').value = this.getAttribute('data-u');\n            calculate();\n        });\n    });\n\n    \/\/ Copy\n    $('vc-copy-btn').addEventListener('click', function() {\n        var text = 'Strength Unit Conversion\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\n' +\n            $('vc-r-mpa').textContent + '\\n' + $('vc-r-ksi').textContent + '\\n' +\n            $('vc-r-psi').textContent + '\\n' + $('vc-r-gpa').textContent + '\\n' +\n            $('vc-r-kpa').textContent + '\\n' + $('vc-r-bar').textContent + '\\n' +\n            $('vc-r-kgfmm').textContent + '\\n' + $('vc-r-kgfcm').textContent + '\\n' +\n            'Force: ' + $('vc-r-forcekn').textContent + '\\n' +\n            '\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nvibromera.eu';\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    \/\/ Sections\n    document.querySelectorAll('.vc-section-toggle').forEach(function(btn) {\n        btn.addEventListener('click', function() {\n            var s = this.closest('.vc-section');\n            s.classList.toggle('vc-open');\n            this.setAttribute('aria-expanded', s.classList.contains('vc-open'));\n        });\n    });\n\n    \/\/ FAQ\n    var faqData = [\n        { q: 'How do I convert MPa to ksi?', a: '<p>Divide MPa by 6.89476. Example: 500 MPa \u00f7 6.895 = <strong>72.5 ksi<\/strong>.<\/p><p>Conversely, multiply ksi by 6.89476 to get MPa.<\/p>' },\n        { q: 'What is the difference between MPa and N\/mm\u00b2?', a: '<p>They are <strong>identical<\/strong>. 1 MPa = 1 N\/mm\u00b2 = 1 MN\/m\u00b2. MPa is the SI unit name, N\/mm\u00b2 is the unit expressed in base units. Both are universally used in engineering.<\/p>' },\n        { q: 'How do I convert stress to force?', a: '<p>Use F = \u03c3 \u00d7 A (Force = Stress \u00d7 Cross-sectional Area).<\/p><p>With stress in MPa and area in mm\u00b2: F is in Newtons (N). Example: 500 MPa \u00d7 100 mm\u00b2 = 50,000 N = 50 kN.<\/p>' },\n        { q: 'What is kgf\/mm\u00b2 and when is it used?', a: '<p>Kilogram-force per square millimeter. An older metric unit (1 kgf\/mm\u00b2 = 9.80665 MPa) still found in:<\/p><ul><li>Russian GOST standards<\/li><li>Japanese JIS standards (older editions)<\/li><li>Some older European specifications<\/li><\/ul>' },\n        { q: 'What are typical steel strength values in different units?', a: '<p>S355 structural steel:<\/p><ul><li>Yield: 355 MPa = 51.5 ksi = 36.2 kgf\/mm\u00b2 = 3550 bar<\/li><li>UTS: 510 MPa = 74.0 ksi = 52.0 kgf\/mm\u00b2 = 5100 bar<\/li><\/ul><p>Stainless 304: Yield 210 MPa (30.5 ksi), UTS 520 MPa (75.4 ksi).<\/p>' }\n    ];\n\n    var fl = $('vc-faq-list');\n    faqData.forEach(function(f) {\n        fl.innerHTML += '<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>' + f.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\">' + f.a + '<\/div><\/div><\/div>';\n    });\n    fl.addEventListener('click', function(e) {\n        var b = e.target.closest('.vc-faq-q');\n        if (!b) return;\n        b.closest('.vc-faq-item').classList.toggle('vc-open');\n    });\n\n    \/\/ History\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    \/\/ URL params\n    function loadParams() {\n        try {\n            var p = new URLSearchParams(window.location.search);\n            if (p.has('v')) $('vc-value').value = p.get('v');\n            if (p.has('u')) $('vc-unit').value = p.get('u');\n            if (p.has('a')) $('vc-area').value = p.get('a');\n        } catch (e) {}\n    }\n\n    \/\/ KaTeX\n    function renderFormulas() {\n        try {\n            katex.render('1\\\\;\\\\text{MPa} = 1\\\\;\\\\text{N\/mm}^2 = 0.14504\\\\;\\\\text{ksi} = 145.04\\\\;\\\\text{PSI} = 10\\\\;\\\\text{bar}', $('vc-katex-1'), { displayMode: true, throwOnError: false });\n            katex.render('1\\\\;\\\\text{kgf\/mm}^2 = 9.80665\\\\;\\\\text{MPa} \\\\qquad 1\\\\;\\\\text{kgf\/cm}^2 = 0.0981\\\\;\\\\text{MPa}', $('vc-katex-2'), { displayMode: true, throwOnError: false });\n            katex.render('F = \\\\sigma \\\\times A \\\\quad [\\\\text{N}] \\\\;\\\\;\\\\text{when}\\\\;\\\\; \\\\sigma\\\\;[\\\\text{MPa}],\\\\; A\\\\;[\\\\text{mm}^2]', $('vc-katex-3'), { displayMode: true, throwOnError: false });\n        } catch (e) {}\n    }\n\n    function init() {\n        loadParams();\n        renderFormulas();\n        calculate();\n    }\n    if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', init);\n    else init();\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>\u09ac\u09bf\u09a8\u09be\u09ae\u09c2\u09b2\u09cd\u09af\u09c7 \u09b6\u0995\u09cd\u09a4\u09bf\/\u099a\u09be\u09aa \u0987\u0989\u09a8\u09bf\u099f \u09b0\u09c2\u09aa\u09be\u09a8\u09cd\u09a4\u09b0\u0995\u09be\u09b0\u09c0\u0964 MPa, kPa, GPa, PSI, ksi, kgf\/mm\u00b2, kgf\/cm\u00b2, bar, N\/mm\u00b2 \u098f\u09b0 \u09ae\u09a7\u09cd\u09af\u09c7 \u09b0\u09c2\u09aa\u09be\u09a8\u09cd\u09a4\u09b0 \u0995\u09b0\u09c1\u09a8\u0964 \u09b8\u09ae\u09b8\u09cd\u09a4 \u0987\u0989\u09a8\u09bf\u099f \u098f\u0995\u09b8\u09be\u09a5\u09c7 \u09aa\u09cd\u09b0\u09a6\u09b0\u09cd\u09b6\u09bf\u09a4\u0964 \u0989\u09aa\u09be\u09a6\u09be\u09a8 \u09b6\u0995\u09cd\u09a4\u09bf \u09b0\u09c7\u09ab\u09be\u09b0\u09c7\u09a8\u09cd\u09b8 \u099f\u09c7\u09ac\u09bf\u09b2 \u0985\u09a8\u09cd\u09a4\u09b0\u09cd\u09ad\u09c1\u0995\u09cd\u09a4\u0964<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100246","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100246","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100246\/revisions"}],"predecessor-version":[{"id":100766,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100246\/revisions\/100766"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/media?parent=100246"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/categories?post=100246"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/tags?post=100246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}