{"id":248,"date":"2026-08-21T18:30:35","date_gmt":"2026-08-21T18:30:35","guid":{"rendered":"https:\/\/netguide.io\/tools\/roemische-zahlen-umrechner\/"},"modified":"2026-08-21T18:30:35","modified_gmt":"2026-08-21T18:30:35","slug":"roemische-zahlen-umrechner","status":"publish","type":"post","link":"https:\/\/netguide.io\/tools\/de\/roemische-zahlen-umrechner\/","title":{"rendered":"R\u00f6mische Zahlen umrechnen"},"content":{"rendered":"<div id=\"netgu-909044540\" class=\"netgu-before-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"3494115342\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>\n<style>\n.wp-rn-container { max-width:100%; background:#fff; padding:20px; border:1px solid #ddd; border-radius:10px; font-family:-apple-system, sans-serif; color:#333; }\n.wp-rn-title { margin:0 0 15px 0; color:#2271b1; font-size:1.4rem; }\n.wp-rn-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(140px, 1fr)); gap:12px; margin-bottom:10px; }\n.wp-rn-input-group label { display:block; font-size:11px; font-weight:bold; margin-bottom:4px; text-transform:uppercase; color:#666; }\n.wp-rn-input-group input, .wp-rn-input-group select { width:100%; padding:8px; border:1px solid #ccc; border-radius:4px; box-sizing:border-box; }\n.wp-rn-checkbox-group { margin:15px 0; font-size:12px; display:flex; align-items:center; gap:8px; color:#666; }\n.wp-rn-note { font-size:12px; color:#666; margin-top:12px; min-height:1em; }\n.wp-rn-warn { color:#d63638; font-weight:bold; }\n.wp-rn-results { margin-top:20px; border-top:2px solid #eee; padding-top:15px; }\n.wp-rn-res-item { display:flex; justify-content:space-between; margin-bottom:6px; font-size:14px; gap:10px; }\n.wp-rn-total { font-weight:bold; font-size:18px; color:#2271b1; margin:10px 0; padding:5px 0; border-top:1px solid #eee; border-bottom:1px solid #eee; }\n.wp-rn-val { color:#2271b1; font-weight:bold; }\n.wp-rn-out { width:100%; box-sizing:border-box; padding:10px; border:1px solid #ccc; border-radius:4px; font-family:monospace; font-size:13px; word-break:break-all; background:#f7f7f7; margin-top:6px; }\n.wp-rn-btn { background:#2271b1; color:#fff; border:none; padding:9px 14px; border-radius:4px; cursor:pointer; font-size:13px; margin-top:10px; }\n<\/style><script>window.wpRnL = {\"range\":\"Nur 1\u20133999\",\"invalid\":\"Ung\u00fcltige r\u00f6mische Zahl\"};<\/script>\n<div class=\"wp-rn-container\">\n  <h3 class=\"wp-rn-title\">R\u00f6mische Zahlen umrechnen<\/h3>\n  <div class=\"wp-rn-grid\">\n    <div class=\"wp-rn-input-group\"><label>Arabisch<\/label><input type=\"number\" id=\"rn-arabic\" value=\"2026\" min=\"1\" max=\"3999\" oninput=\"rnConv()\"><\/div>\n    <div class=\"wp-rn-input-group\"><label>R\u00f6misch \\u2192<\/label><input type=\"text\" id=\"rn-roman-out\" readonly><\/div>\n  <\/div>\n  <div id=\"rn-arabic-err\" class=\"wp-rn-warn\" style=\"min-height:1em;margin:4px 0;\"><\/div>\n  <div class=\"wp-rn-grid\" style=\"margin-top:14px;\">\n    <div class=\"wp-rn-input-group\"><label>R\u00f6misch<\/label><input type=\"text\" id=\"rn-roman\" value=\"MMXXVI\" oninput=\"rnBack()\"><\/div>\n    <div class=\"wp-rn-input-group\"><label>Arabisch \\u2192<\/label><input type=\"text\" id=\"rn-arabic-out\" readonly><\/div>\n  <\/div>\n  <div id=\"rn-roman-err\" class=\"wp-rn-warn\" style=\"min-height:1em;margin:4px 0;\"><\/div>\n  <div class=\"wp-rn-note\">G\u00fcltig von 1 bis 3999. Die R\u00fcckwandlung pr\u00fcft auch, ob die r\u00f6mische Schreibweise korrekt ist.<\/div>\n<\/div>\n<script>\nfunction toRoman(n){ if(n<1)return null; if(n>3999)return null; var m=[[1000,'M'],[900,'CM'],[500,'D'],[400,'CD'],[100,'C'],[90,'XC'],[50,'L'],[40,'XL'],[10,'X'],[9,'IX'],[5,'V'],[4,'IV'],[1,'I']]; var r=''; for(var i=0;i<m.length;i++){ while(n>=m[i][0]){ r+=m[i][1]; n-=m[i][0]; } } return r; }\nfunction fromRoman(s){ s=String(s).toUpperCase().replace(\/\\s\/g,''); if(!\/^[IVXLCDM]+$\/.test(s))return null; var map={I:1,V:5,X:10,L:50,C:100,D:500,M:1000}; var total=0; for(var i=0;i<s.length;i++){ var cur=map[s[i]], nx=map[s[i+1]]; if(nx>cur){ total-=cur; } else { total+=cur; } } if(toRoman(total)!==s)return null; return total; }\nfunction rnConv(){\n  var a=document.getElementById('rn-arabic').value.trim(); var oR=document.getElementById('rn-roman-out'); var eA=document.getElementById('rn-arabic-err');\n  if(a!==''){ var n=parseInt(a,10); var r=toRoman(n); oR.value = r===null ? '' : r; eA.innerText = r===null ? ((window.wpRnL||{}).range||'1-3999') : ''; }\n  else { oR.value=''; eA.innerText=''; }\n}\nfunction rnBack(){\n  var r=document.getElementById('rn-roman').value.trim(); var oA=document.getElementById('rn-arabic-out'); var eR=document.getElementById('rn-roman-err');\n  if(r!==''){ var n=fromRoman(r); oA.value = n===null ? '' : n; eR.innerText = n===null ? ((window.wpRnL||{}).invalid||'invalid') : ''; }\n  else { oA.value=''; eR.innerText=''; }\n}\nrnConv(); rnBack();\n<\/script>\n\n\n<div id=\"netgu-3648077717\"><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- NetGuide.io-After-Widget-Tools -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-6258556257245998\"\r\n     data-ad-slot=\"5175852350\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">R\u00f6mische Zahlen umrechnen<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Der Umrechner wandelt in beide Richtungen: arabische Zahlen (z. B. 2026) in r\u00f6mische (MMXXVI) und umgekehrt. Er erkennt auch ung\u00fcltige Schreibweisen wie \u201eIIII&#8221; statt \u201eIV&#8221;.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Bereich:<\/strong> Das klassische r\u00f6mische System deckt 1 bis 3999 ab.<\/li>\n\n\n<li><strong>Subtraktionsregel:<\/strong> IV = 4, IX = 9, XL = 40 usw. \u2013 ein kleinerer Wert vor einem gr\u00f6\u00dferen wird abgezogen.<\/li>\n\n\n<li><strong>Validierung:<\/strong> Nur korrekt geschriebene r\u00f6mische Zahlen werden akzeptiert.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Verwandte Tools<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"\/tools\/de\/zahlenbasis-konverter\/\">Zahlenbasis-Konverter<\/a><\/li>\n\n\n<li><a href=\"\/tools\/de\/einheiten-umrechner\/\">Einheiten-Umrechner<\/a><\/li>\n<\/ul>\n\n\n<div id=\"netgu-26229889\" class=\"netgu-after-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"4559785002\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Arabische Zahlen in r\u00f6mische umwandeln und zur\u00fcck \u2013 von 1 bis 3999, mit G\u00fcltigkeitspr\u00fcfung. L\u00e4uft im Browser.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","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":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","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":""},"categories":[53],"tags":[],"class_list":["post-248","post","type-post","status-publish","format-standard","hentry","category-converter"],"brizy_media":[],"_links":{"self":[{"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/posts\/248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/comments?post=248"}],"version-history":[{"count":0,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/posts\/248\/revisions"}],"wp:attachment":[{"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/media?parent=248"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/categories?post=248"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/tags?post=248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}