Roman Numeral Converter
Convert between numbers and Roman numerals.
Numbers and Roman numerals
Roman numerals build from I, V, X, L, C, D, and M using subtractive pairs like IV for four. 2024 is MMXXIV, and this converts either direction.
It is handy for reading copyright dates and clock faces, numbering book chapters or Super Bowls, and writing dates in the formal style monuments and certificates use.
The 3999 ceiling
Standard Roman numerals only reach 3,999, since there is no single symbol above M. Your input is converted locally and never uploaded. It also validates as it converts, so an impossible sequence like IIII or VX is flagged rather than silently accepted.
Frequently Asked Questions
How does the roman numeral converter work?
The converter subtracts Roman values from largest to smallest, including subtractive pairs like IV, IX, XL, and CM. 2026 becomes MMXXVI.
When should I use this tool?
Use it for outlines, copyright years, book sections, tattoos, clocks, and educational checks.
What is the main limitation?
Standard Roman numerals cover 1 through 3999 without overline notation.
Is this converter private?
Yes. It runs entirely in your browser, so your values are not uploaded or stored.
More free browser utilities for conversion, formatting, and technical cleanup.