{"id":5074,"date":"2026-06-18T12:04:34","date_gmt":"2026-06-18T12:04:34","guid":{"rendered":"https:\/\/rimanagency.com\/roman-numeral-converter-numbers-years-dates-to-roman-numerals\/"},"modified":"2026-06-18T12:04:34","modified_gmt":"2026-06-18T12:04:34","slug":"roman-numeral-converter-numbers-years-dates-to-roman-numerals","status":"publish","type":"page","link":"https:\/\/rimanagency.com\/fr\/roman-numeral-converter-numbers-years-dates-to-roman-numerals\/","title":{"rendered":"Convertisseur de chiffres romains \u2014 Nombres, ann\u00e9es et dates en chiffres romains"},"content":{"rendered":"<style>.rt-h{background:linear-gradient(135deg,#f1f5e8,#e8efdb);border-radius:14px;padding:32px;margin:0 0 24px;text-align:center}.rt-h h1{margin:0 0 10px;font-size:28px;color:#4a6320}.rt-g{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:0 0 24px}.rt-f,.rt-o{background:#fff;border:1px solid #e0e6d8;border-radius:10px;padding:22px}.rt-f h3,.rt-o h3{margin:0 0 14px;color:#4a6320;font-size:18px}.rt-f label{display:block;font-size:13px;color:#516048;font-weight:600;margin:10px 0 6px}.rt-f input,.rt-f select,.rt-f textarea{width:100%;padding:9px;border:1px solid #d4dac6;border-radius:6px;font-size:14px;box-sizing:border-box;font-family:inherit}.rt-btn{background:#719430;color:#fff;border:none;padding:11px 20px;border-radius:6px;font-weight:700;cursor:pointer;width:100%;margin-top:14px;font-size:15px}.rt-btn:hover{background:#4a6320}.rt-cta{background:linear-gradient(135deg,#719430,#4a6320);color:#fff;border-radius:14px;padding:32px;text-align:center;margin:30px 0}.rt-cta h3{margin:0 0 6px;color:#fff}.rt-cta a{background:#fff;color:#4a6320;padding:12px 28px;border-radius:6px;font-weight:700;text-decoration:none;display:inline-block;margin-top:14px}.rt-o-big{font-size:36px;font-weight:800;color:#719430;text-align:center;margin:6px 0;word-break:break-word}@media(max-width:768px){.rt-g{grid-template-columns:1fr}}<\/style>\n<div class=\"rt-h\">\n<h1>Roman Numeral Converter<\/h1>\n<p>Convert any number, year, or date to Roman numerals (and back). Supports values from 1 to 3,999,999 \u2014 perfect for tattoos, weddings, anniversaries, design projects, and copyright pages.<\/p>\n<\/div>\n<div class=\"rt-g\">\n<div class=\"rt-f\">\n<h3>Your Number or Roman Numeral<\/h3>\n<p><label>Number or Roman numeral<\/label><input type=\"text\" id=\"rn-in\" placeholder=\"Try 2026 or MMXXVI or 1985-07-13\"><label>Mode<\/label><select id=\"rn-mode\"><option value=\"auto\" selected>Auto-detect (recommended)<\/option><option value=\"toRoman\">Number \u2192 Roman<\/option><option value=\"toNumber\">Roman \u2192 Number<\/option><\/select><button class=\"rt-btn\" onclick=\"cRn()\">Convert<\/button><\/div>\n<div class=\"rt-o\">\n<h3>Conversion<\/h3>\n<div class=\"rt-o-big\" id=\"rn-out\">\u2014<\/div>\n<\/div>\n<\/div>\n<p><script>function cRn(){var v=document.getElementById(\"rn-in\").value.trim();var m=document.getElementById(\"rn-mode\").value;if(!v){document.getElementById(\"rn-out\").textContent=\"\u2014\";return}var isRoman=\/^[IVXLCDM\\u0305]+$\/i.test(v);var mode=m===\"auto\"?(\/^\\d\/.test(v)?\"toRoman\":isRoman?\"toNumber\":\"toRoman\"):m;function toRoman(n){if(n<1||n>3999999)return \"Out of range (1-3999999)\";var rgx=[[1000000,\"M\u0305\"],[900000,\"C\u0305M\u0305\"],[500000,\"D\u0305\"],[400000,\"C\u0305D\u0305\"],[100000,\"C\u0305\"],[90000,\"X\u0305C\u0305\"],[50000,\"L\u0305\"],[40000,\"X\u0305L\u0305\"],[10000,\"X\u0305\"],[9000,\"I\u0305X\u0305\"],[5000,\"V\u0305\"],[4000,\"I\u0305V\u0305\"],[1000,\"M\"],[900,\"CM\"],[500,\"D\"],[400,\"CD\"],[100,\"C\"],[90,\"XC\"],[50,\"L\"],[40,\"XL\"],[10,\"X\"],[9,\"IX\"],[5,\"V\"],[4,\"IV\"],[1,\"I\"]];var out=\"\";rgx.forEach(function(p){while(n>=p[0]){out+=p[1];n-=p[0]}});return out}function toNumber(r){var map={I:1,V:5,X:10,L:50,C:100,D:500,M:1000};var n=0;r=r.toUpperCase().replace(\/\\u0305\/g,\"\");for(var i=0;i<r.length;i++){var c=map[r[i]];var nx=map[r[i+1]];if(nx&#038;&#038;nx>c)n-=c;else n+=c}return n}if(\/^\\d{4}-\\d{2}-\\d{2}$\/.test(v)){var parts=v.split(\"-\");document.getElementById(\"rn-out\").textContent=toRoman(+parts[0])+\" \u00b7 \"+toRoman(+parts[1])+\" \u00b7 \"+toRoman(+parts[2])}else if(mode===\"toRoman\")document.getElementById(\"rn-out\").textContent=toRoman(parseInt(v.replace(\/\\D\/g,\"\"))||0);else document.getElementById(\"rn-out\").textContent=toNumber(v)}<\/script><\/p>\n<h2>How to use the Roman Numeral Converter<\/h2>\n<p>Type a number (e.g., 2026), a Roman numeral (e.g., MMXXVI), or a full date in YYYY-MM-DD format (e.g., 1985-07-13). The converter auto-detects what you typed and shows the result. For dates, you get each part (year, month, day) converted separately.<\/p>\n<h2>Why this tool matters<\/h2>\n<p>Roman numerals appear everywhere modern design wants timeless gravitas: building cornerstones, monument inscriptions, Super Bowl numbering, book chapter headings, royal lineage, and the copyright dates on every movie credit roll. Tattoos and wedding bands are the most common personal use \u2014 having a tool that handles dates cleanly saves a lot of hand-conversion mistakes.<\/p>\n<h2>Common use cases<\/h2>\n<ul>\n<li>Wedding date tattoos and engraved jewelry<\/li>\n<li>Anniversary cards and gifts<\/li>\n<li>Movie title cards and end credits<\/li>\n<li>Chapter headings in books and presentations<\/li>\n<li>Building cornerstones and monument inscriptions<\/li>\n<li>Copyright year on legal pages<\/li>\n<li>Super Bowl, Olympic, and historical event numbering<\/li>\n<\/ul>\n<h2>How Roman numerals work (the short version)<\/h2>\n<p>Seven Latin letters represent values: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Smaller before larger means subtract (IV = 4); smaller after larger means add (VI = 6). For numbers above 3,999, traditional notation adds a bar (vinculum) over the letter to multiply by 1,000 \u2014 which our tool produces correctly.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<p><strong>Can I convert dates?<\/strong><br \/>Yes. Type a date in YYYY-MM-DD format and the converter will display year, month, and day as three separate Roman numerals.<\/p>\n<p><strong>What is the maximum number?<\/strong><br \/>Standard Roman numerals max out at 3,999 (MMMCMXCIX). For larger numbers we use the vinculum (overbar) convention which multiplies by 1,000 \u2014 supporting up to 3,999,999.<\/p>\n<p><strong>Why is 4 IV and not IIII?<\/strong><br \/>Subtractive notation (IV) is the standard form taught in schools and used in modern publishing. The additive form (IIII) does appear on clocks for visual balance but is technically incorrect.<\/p>\n<p><strong>Is zero a Roman numeral?<\/strong><br \/>No. The Roman system has no symbol for zero \u2014 the concept arrived in Europe via Arabic mathematics centuries later. Our converter will return an error if you enter 0.<\/p>\n<div class=\"rt-cta\">\n<h3>Need a brand identity with timeless typography?<\/h3>\n<p style=\"margin:0;opacity:.95\">Riman Agency builds visual brand systems that age well.<\/p>\n<p><a href=\"\/contact\/\">Talk to Brand Strategy<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Roman Numeral Converter Convert any number, year, or date to Roman numerals (and back). Supports values from 1 to 3,999,999 \u2014 perfect for tattoos, weddings, anniversaries, design projects, and copyright pages. Your Number or Roman Numeral Number or Roman numeralModeAuto-detect (recommended)Number \u2192 RomanRoman \u2192 NumberConvert Conversion \u2014 How to use the Roman Numeral Converter Type [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-5074","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Roman Numeral Converter \u2014 Numbers, Years &amp; Dates to Roman Numerals - Riman Agency<\/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:\/\/rimanagency.com\/fr\/roman-numeral-converter-numbers-years-dates-to-roman-numerals\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Roman Numeral Converter \u2014 Numbers, Years &amp; Dates to Roman Numerals - Riman Agency\" \/>\n<meta property=\"og:description\" content=\"Roman Numeral Converter Convert any number, year, or date to Roman numerals (and back). 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