Roman Numeral Converter
Convert a number to Roman numerals, or a Roman numeral back to a number.
MMXXVI
Free to use, no sign-up, no limit on how many times you run it.More generators tools
Overview
Converts between regular numbers and Roman numerals in both directions — useful for dates (a popular tattoo and jewelry format), outlines, or just curiosity.
- Works in both directions
- Validates Roman numeral input and flags invalid entries
- Copy the result in one click
How to use it
- 1Choose a direction
- 2Enter a number or Roman numeral
- 3Copy the converted result
Frequently asked questions
What's the range of numbers this supports?
1 to 3999 — standard Roman numeral notation doesn't have an agreed-upon way to represent 0 or numbers of 4000 and above.
Why do I sometimes see 4 written as IIII instead of IV?
IV is the standard subtractive notation used almost everywhere today, including by this tool, but IIII appears historically and is still sometimes used on clock faces for visual symmetry.