{"id":100038,"date":"2026-02-15T20:07:44","date_gmt":"2026-02-15T20:07:44","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100038"},"modified":"2026-02-15T20:07:44","modified_gmt":"2026-02-15T20:07:44","slug":"bolt-dimensions-weight","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/bn\/calculators\/bolt-dimensions-weight\/","title":{"rendered":"Bolt Dimensions &amp; Weight Calculator | ISO 4014\/4017 | Free Online Tool"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Bolt Dimensions & Weight Calculator\",\"alternateName\":[\"ISO 4014 Bolt Lookup\",\"Hex Bolt Weight Calculator\"],\"description\":\"Free online lookup for metric hex bolt dimensions and mass per ISO 4014\/4017.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/bolt-dimensions-weight\/\",\"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\":[\"ISO 4014\/4017 dimensions\",\"Head size and height\",\"Thread length calculation\",\"Mass estimation\",\"Auto-calculation\"],\"keywords\":\"bolt dimensions, bolt weight, ISO 4014, ISO 4017, hex bolt, thread length\"}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"What is the difference between ISO 4014 and ISO 4017?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"ISO 4014 covers hex head bolts with a partial thread (shank), while ISO 4017 covers hex head screws that are fully threaded. Both share the same head dimensions but differ in thread length.\"}},\n{\"@type\":\"Question\",\"name\":\"How is bolt thread length calculated?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Per ISO 4014, thread length b = 2d + 6 for bolts \u2264125mm, b = 2d + 12 for 125<L\u2264200mm, and b = 2d + 25 for L>200mm, where d is nominal diameter and L is bolt length.\"}},\n{\"@type\":\"Question\",\"name\":\"How do you calculate bolt weight?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Bolt mass is estimated from the volume of the head (hexagonal prism) plus the shank (cylinder) multiplied by steel density (7850 kg\/m\u00b3). The thread reduces the effective diameter slightly, so actual mass may be 2-5% less.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the head size for an M10 bolt?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Per ISO 4014\/4017, an M10 hex bolt has a head width across flats (s) of 16 mm, width across corners of 18.48 mm, and head height (k) of 6.4 mm.\"}},\n{\"@type\":\"Question\",\"name\":\"Are ISO 4014 dimensions the same as DIN 931?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"ISO 4014 replaced DIN 931. The dimensions are very similar but not identical. ISO 4014 has slightly different tolerances on some sizes. 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class=\"vc-calculator\" id=\"vc-bolt-dim\">\n<header class=\"vc-header\">\n    <p class=\"vc-header-eyebrow\">Free Engineering Tool<\/p>\n    <h1 class=\"vc-header-title\">Bolt Dimensions &amp; Weight Lookup<\/h1>\n    <p class=\"vc-header-subtitle\">Look up metric hex bolt dimensions and estimate mass per ISO 4014\/4017. Select bolt size and length.<\/p>\n    <div class=\"vc-badges\"><span class=\"vc-badge\">ISO 4014<\/span><span class=\"vc-badge\">ISO 4017<\/span><span class=\"vc-badge\">DIN 931\/933<\/span><\/div>\n<\/header>\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-size\">Bolt Size<\/label>\n                <select class=\"vc-select\" id=\"vc-size\">\n                    <option value=\"6\" data-s=\"10\" data-k=\"4.0\" data-p=\"1.0\">M6<\/option>\n                    <option value=\"8\" data-s=\"13\" data-k=\"5.3\" data-p=\"1.25\">M8<\/option>\n                    <option value=\"10\" data-s=\"16\" data-k=\"6.4\" data-p=\"1.5\" selected>M10<\/option>\n                    <option value=\"12\" data-s=\"18\" data-k=\"7.5\" data-p=\"1.75\">M12<\/option>\n                    <option value=\"14\" data-s=\"21\" data-k=\"8.8\" data-p=\"2.0\">M14<\/option>\n                    <option value=\"16\" data-s=\"24\" data-k=\"10.0\" data-p=\"2.0\">M16<\/option>\n                    <option value=\"20\" data-s=\"30\" data-k=\"12.5\" data-p=\"2.5\">M20<\/option>\n                    <option value=\"24\" data-s=\"36\" data-k=\"15.0\" data-p=\"3.0\">M24<\/option>\n                    <option value=\"30\" data-s=\"46\" data-k=\"18.7\" data-p=\"3.5\">M30<\/option>\n                    <option value=\"36\" data-s=\"55\" data-k=\"22.5\" data-p=\"4.0\">M36<\/option>\n                    <option value=\"42\" data-s=\"65\" data-k=\"26.0\" data-p=\"4.5\">M42<\/option>\n                    <option value=\"48\" data-s=\"75\" data-k=\"30.0\" data-p=\"5.0\">M48<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-length\">Bolt Length <span class=\"vc-label-hint\">(mm)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-length\" inputmode=\"decimal\" step=\"5\" min=\"10\" value=\"50\" placeholder=\"e.g. 50\">\n            <\/div>\n        <\/div>\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Quick presets<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-sz=\"8\" data-l=\"30\">M8 \u00d7 30<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-sz=\"10\" data-l=\"50\">M10 \u00d7 50<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-sz=\"16\" data-l=\"80\">M16 \u00d7 80<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-sz=\"20\" data-l=\"100\">M20 \u00d7 100<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-sz=\"24\" data-l=\"120\">M24 \u00d7 120<\/button>\n        <\/div>\n    <\/form>\n    <div class=\"vc-results\" id=\"vc-results\">\n        <div class=\"vc-results-head\"><h2 class=\"vc-results-title\">Results<\/h2><button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\"><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<\/button><\/div>\n        <div class=\"vc-result-grid\">\n            <div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\">Estimated Mass<\/div><div class=\"vc-rcard-value\" id=\"vc-r-mass\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Head Width Across Flats (s)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-s\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Head Height (k)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-k\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Thread Length (b)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-b\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Thread Pitch (P)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-p\">\u2014<\/div><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"vc-section vc-open\" id=\"vc-sec-theory\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">Theory &amp; Formulas<\/span><\/span><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><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner vc-theory\">\n        <h3>Thread Length (ISO 4014)<\/h3>\n        <div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n        <h3>Mass Estimation<\/h3>\n        <div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\n        <p>Where \u03c1 = 7850 kg\/m\u00b3 for carbon steel. The head is approximated as a cylinder of diameter s.<\/p>\n        <h3>Standard Dimensions<\/h3>\n        <table class=\"vc-table\">\n            <thead><tr><th>Size<\/th><th>s (mm)<\/th><th>k (mm)<\/th><th>P (mm)<\/th><\/tr><\/thead>\n            <tbody>\n                <tr><td>M6<\/td><td>10<\/td><td>4.0<\/td><td>1.0<\/td><\/tr>\n                <tr><td>M8<\/td><td>13<\/td><td>5.3<\/td><td>1.25<\/td><\/tr>\n                <tr><td>M10<\/td><td>16<\/td><td>6.4<\/td><td>1.5<\/td><\/tr>\n                <tr><td>M12<\/td><td>18<\/td><td>7.5<\/td><td>1.75<\/td><\/tr>\n                <tr><td>M16<\/td><td>24<\/td><td>10.0<\/td><td>2.0<\/td><\/tr>\n                <tr><td>M20<\/td><td>30<\/td><td>12.5<\/td><td>2.5<\/td><\/tr>\n                <tr><td>M24<\/td><td>36<\/td><td>15.0<\/td><td>3.0<\/td><\/tr>\n                <tr><td>M30<\/td><td>46<\/td><td>18.7<\/td><td>3.5<\/td><\/tr>\n                <tr><td>M36<\/td><td>55<\/td><td>22.5<\/td><td>4.0<\/td><\/tr>\n            <\/tbody>\n        <\/table>\n        <div class=\"vc-warning-box\"><p style=\"margin:0;font-size:14px;color:var(--vc-ink-secondary)\"><strong>\u26a0\ufe0f Note:<\/strong> Mass is approximate. Actual mass depends on exact tolerances and plating. 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Last updated: February 2026<\/p><div class=\"vc-footer-links\"><a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a><a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a><\/div><\/footer>\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    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 o=$('vc-size').selectedOptions[0];\n        var d=parseFloat(o.value),s=parseFloat(o.getAttribute('data-s')),k=parseFloat(o.getAttribute('data-k')),P=parseFloat(o.getAttribute('data-p'));\n        var L=parseFloat($('vc-length').value);\n        if(!L||L<=0){$('vc-results').classList.remove('vc-visible');return}\n        \/\/ Thread length per ISO 4014\n        var b;\n        if(L<=125) b=2*d+6;\n        else if(L<=200) b=2*d+12;\n        else b=2*d+25;\n        b=Math.min(b,L); \/\/ can't exceed bolt length\n        \/\/ Mass: head (hex ~ circle approx) + shank\n        var rho=7850; \/\/ kg\/m\u00b3\n        var Vhead=Math.PI\/4*s*s*k; \/\/ mm\u00b3 (approx as cylinder)\n        var Vshank=Math.PI\/4*d*d*L; \/\/ mm\u00b3\n        var Vtotal=Vhead+Vshank; \/\/ mm\u00b3\n        var mass=Vtotal*rho\/1e9; \/\/ kg\n        var massG=mass*1000;\n\n        $('vc-r-mass').innerHTML=(massG>=100?fmt(massG,0):fmt(massG,1))+' <span class=\"vc-rcard-unit\">g<\/span> <span class=\"vc-rcard-unit\">('+fmt(mass,3)+' kg)<\/span>';\n        $('vc-r-s').innerHTML=fmt(s,0)+' <span class=\"vc-rcard-unit\">mm<\/span>';\n        $('vc-r-k').innerHTML=fmt(k,1)+' <span class=\"vc-rcard-unit\">mm<\/span>';\n        $('vc-r-b').innerHTML=fmt(b,0)+' <span class=\"vc-rcard-unit\">mm<\/span>';\n        $('vc-r-p').innerHTML=fmt(P,2)+' <span class=\"vc-rcard-unit\">mm<\/span>';\n        $('vc-results').classList.add('vc-visible');\n    }\n\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn){btn.addEventListener('click',function(e){e.preventDefault();$('vc-size').value=this.getAttribute('data-sz');$('vc-length').value=this.getAttribute('data-l');calculate()})});\n    $('vc-form').addEventListener('input',calculate);$('vc-form').addEventListener('change',calculate);\n\n    $('vc-copy-btn').addEventListener('click',function(){var text='Bolt Dimensions\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nSize: M'+$('vc-size').value+' \u00d7 '+$('vc-length').value+'mm\\nMass: '+$('vc-r-mass').textContent+'\\nHead (s): '+$('vc-r-s').textContent+'\\nHead (k): '+$('vc-r-k').textContent+'\\nThread: '+$('vc-r-b').textContent+'\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nvibromera.eu';if(navigator.clipboard){navigator.clipboard.writeText(text).then(function(){var b=$('vc-copy-btn');b.classList.add('vc-copied');b.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!';setTimeout(function(){b.classList.remove('vc-copied');b.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    document.querySelectorAll('.vc-section-toggle').forEach(function(btn){btn.addEventListener('click',function(){var s=this.closest('.vc-section');s.classList.toggle('vc-open');this.setAttribute('aria-expanded',s.classList.contains('vc-open'))})});\n\n    var faqData=[\n        {q:'What is the difference between ISO 4014 and ISO 4017?',a:'<p>ISO 4014 = hex bolts with partial thread (shank). ISO 4017 = fully threaded hex screws. Same head dimensions, different thread length.<\/p>'},\n        {q:'How is bolt thread length calculated?',a:'<p>Per ISO 4014: b = 2d+6 for L\u2264125, b = 2d+12 for 125&lt;L\u2264200, b = 2d+25 for L&gt;200mm.<\/p>'},\n        {q:'How do you calculate bolt weight?',a:'<p>Estimate from head volume + shank volume \u00d7 steel density (7850 kg\/m\u00b3). Thread reduces effective diameter, so actual mass is 2\u20135% less.<\/p>'},\n        {q:'What is the head size for an M10 bolt?',a:'<p>M10: s = 16 mm across flats, k = 6.4 mm head height per ISO 4014\/4017.<\/p>'},\n        {q:'Are ISO 4014 and DIN 931 the same?',a:'<p>ISO 4014 replaced DIN 931. Very similar but not identical \u2014 ISO has slightly different tolerances. Use ISO for new designs.<\/p>'}\n    ];\n    var fl=$('vc-faq-list');faqData.forEach(function(f){fl.innerHTML+='<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>'+f.q+'<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">'+f.a+'<\/div><\/div><\/div>'});\n    fl.addEventListener('click',function(e){var b=e.target.closest('.vc-faq-q');if(b)b.closest('.vc-faq-item').classList.toggle('vc-open')});\n\n    function renderFormulas(){try{\n        katex.render('b = \\\\begin{cases} 2d + 6 & L \\\\leq 125 \\\\\\\\ 2d + 12 & 125 < L \\\\leq 200 \\\\\\\\ 2d + 25 & L > 200 \\\\end{cases} \\\\quad [\\\\text{mm}]',$('vc-katex-1'),{displayMode:true,throwOnError:false});\n        katex.render('m \\\\approx \\\\rho \\\\left( \\\\frac{\\\\pi}{4} s^2 k + \\\\frac{\\\\pi}{4} d^2 L \\\\right) \\\\quad [\\\\text{kg}]',$('vc-katex-2'),{displayMode:true,throwOnError:false});\n    }catch(e){}}\n\n    function init(){renderFormulas();calculate()}\n    if(document.readyState==='loading'){document.addEventListener('DOMContentLoaded',init)}else{init()}\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Free online lookup for metric bolt dimensions and weight per ISO 4014\/4017. Enter bolt size and length to see head size, thread length, and mass.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100038","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100038","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":1,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100038\/revisions"}],"predecessor-version":[{"id":100349,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100038\/revisions\/100349"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/media?parent=100038"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/categories?post=100038"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/tags?post=100038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}