Roman numerals still appear on clocks, book chapters, film credits, monuments and royal titles, but reading and writing them is a skill few of us use daily. The Roman Numeral Converter translates ordinary numbers into Roman numerals and decodes Roman numerals back into numbers, instantly and accurately.
How to use the Roman Numeral Converter
- Enter a number to get its Roman numeral, or type a numeral to get its value.
- Read the converted result.
- Copy it for your document or design.
A number system that endures
The Romans built their numerals from a handful of letters — I, V, X, L, C, D and M — combined according to simple rules, where a smaller symbol before a larger one means subtraction (IV is 4, not 6). Centuries later we still use them for their formal, decorative feel: Super Bowls, monarchs, copyright years and clock faces all favour Roman numerals. This converter handles the rules for you, so you never have to puzzle out whether MCMXCIV is really 1994 (it is).
Tips for Roman numerals
- Subtractive pairs like IV (4), IX (9) and XL (40) trip people up — let the tool handle them.
- There is no zero in the Roman system.
- Standard numerals go up to 3,999 using these letters.
- Great for chapter numbers, dates and formal titles.
Conversion runs in your browser, so nothing is uploaded.
Quick reference
| Number | Roman |
|---|---|
| 4 | IV |
| 9 | IX |
| 40 | XL |
| 90 | XC |
| 1994 | MCMXCIV |