Skip to content
littlekit.app
All tools

Roman numeral converter

Convert numbers and Roman numerals in either direction, with a breakdown of additive and subtractive symbols.

Numeral breakdownMCMXCIV

1994 = MCMXCIV

M1000CM900XC90IV4

I 1 · V 5 · X 10 · L 50 · C 100 · D 500 · M 1000

Processed on your device

How it works & useful details

How it works & limits

Supports canonical Roman numerals from I (1) to MMMCMXCIX (3,999). Uppercase and lowercase input are accepted; output is uppercase. Subtractive pairs are IV, IX, XL, XC, CD, and CM.

Nonstandard spellings such as IIII, IC, or VX are rejected. Zero, negative numbers, fractions, and overbar notation are outside this tool's scope.

Your working space

Change the values to explore the preview. Use the action below to create a copyable, downloadable result. All calculations stay on this device; refreshing clears your work.