Roman Numeral Converter
Last updated: June 1, 2026Numbers to Roman numerals and back.
Roman Numeral Converter is a free online tool to numbers to Roman numerals and back. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Roman Numeral Converter
The Roman Numeral Converter turns numbers (1–3999) into Roman numerals and decodes Roman numerals back into numbers, validating the input. Great for dates, names and tattoos. Free and runs in your browser.
- 1Choose Number → Roman or Roman → Number.
- 2Enter your value.
- 3Copy the converted result.
Both directions
Encode numbers to numerals or decode numerals to numbers.
Validated
Flags invalid numerals so you get correct results.
Free & private
Runs on your device with no sign-up.
Roman Numeral Converter — frequently asked questions
How do I write 2026 in Roman numerals?
2026 is MMXXVI. Enter any number from 1 to 3999 and the tool converts it instantly.
Why is there a 3999 limit?
Standard Roman numerals only go up to 3999 (MMMCMXCIX) without special overline notation.
Is it free?
Yes, completely free.
Share this tool
Send it to someone who needs it or save the link for later.
More developer tools
View allBinary Code Translator
Text to binary and binary to text.
HTML, CSS & JS Compiler
Online HTML, CSS & JS compiler with live preview.
Python Compiler
Online Python compiler — run Python in your browser.
JavaScript Compiler
Online JavaScript compiler & playground — run JS instantly.
TypeScript Compiler
Online TypeScript compiler — compile & run TS.
SQL Compiler (SQLite)
Online SQL compiler — run SQLite queries in your browser.