{"id":1816,"date":"2023-06-04T01:54:38","date_gmt":"2023-06-04T01:54:38","guid":{"rendered":"https:\/\/quickpercentcalc.com\/overige\/krachtberekening-1rm\/"},"modified":"2025-04-07T18:56:34","modified_gmt":"2025-04-07T18:56:34","slug":"krachtberekening-1rm","status":"publish","type":"page","link":"https:\/\/quickpercentcalc.com\/nl\/overige\/krachtberekening-1rm\/","title":{"rendered":"Krachtberekening (1RM)"},"content":{"rendered":"\n<p>Bereken je maximale inspanning (1RM). Met onze calculator kun je gemakkelijk je 1RM schatten. <\/p>\n\n<p>Met deze calculator kun je het gewicht en het aantal herhalingen van een krachtoefening invoeren om het maximale gewicht te schatten dat je kunt tillen voor \u00e9\u00e9n rep. Als je bijvoorbeeld 5 keer op 225 lbs bankdrukt, is het geschatte 1RM 253,2 lbs.<\/p>\n\n<p>Er zijn verschillende formules die gebruikt worden om 1RM te schatten, maar een van de populairste en vrij nauwkeurige methoden is de formule van Matt Brzycki.<\/p>\n\n<p>Formule voor 1RM:<\/p>\n\n<style>\n.frac {\n    display: inline-block;\n    position: relative;\n    vertical-align: middle;\n    letter-spacing: 0.001em;\n    text-align: center;\n}\n.frac > span {\n    display: block;\n    padding: 0.1em;\n}\n.frac span.bottom {\n    border-top: thin solid black;\n}\n.frac span.symbol {\n    display: none;\n}\n<\/style>\n\n<div class=\"formel\">\n  $$frac{gewicht ~ in ~ lbs ~ of ~ kgs}{1,0278 &#8211; (0,0278 \\times herhalingen)}$\n<\/div>\n<br\/><br\/>\n\n<script>\nfunction calculate1RM() {\n    var weight = parseFloat(\n        document.getElementById(\"w\").value.replace(\/,\/g, \".\")\n    ).toFixed(4);\n\n    var reps = parseFloat(\n        document.getElementById(\"r\").value.replace(\/,\/g, \".\")\n    ).toFixed(4);\n\n    var result = weight \/ (1.0278 - (0.0278 * reps));\n    result = parseFloat(result);\n\n    if (result % 1 !== 0) {\n        result = result.toFixed(1);\n    } else {\n        result = result.toFixed();\n    }\n\n    document.getElementById(\"result\").innerHTML = result.toString();\n    document.getElementById(\"resultBox\").style.visibility = \"visible\";\n}\n<\/script>\n\n<label for=\"w\">Getild gewicht (lbs of kg)<\/label>\n<input type=\"number\" id=\"w\" min=\"0\"\/>\n<br\/><br\/><label for=\"r\">Aantal herhalingen<\/label>\n<input type=\"number\" id=\"r\" min=\"0\"\/>\n<br\/><br\/>\n<input type=\"button\" id=\"calculate\" value=\"Bereken\" onclick=\"calculate1RM()\"\/>\n<br\/><br\/><div id=\"resultBox\" style=\"visibility: hidden;\">\n    <span>Geschatte 1RM:<\/span><br\/>    <span id=\"result\" class=\"calculationResult\"><\/span>    \n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Bereken je maximale inspanning (1RM). Met onze calculator kun je gemakkelijk je 1RM schatten. Met deze calculator kun je het [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1770,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"kalkulator-side.php","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-1816","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Krachtberekening (1RM) - Quick Percent Calculator<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/quickpercentcalc.com\/nl\/overige\/krachtberekening-1rm\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Krachtberekening (1RM) - Quick Percent Calculator\" \/>\n<meta property=\"og:description\" content=\"Bereken je maximale inspanning (1RM). 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