Roman Numeral Converter
Roman numerals are the ancient number system of Rome, still used today on clock faces, book chapters, movie credits, and major sporting events. This free converter translates any number into Roman numerals — and Roman numerals back into numbers — instantly.
How to Use This Converter
- Choose a mode: Number → Roman or Roman → Number.
- Enter a whole number from 1 to 3999, or Roman numerals using I, V, X, L, C, D, M.
- Click Convert to see the result.
Roman Numeral Chart
The seven basic symbols are:
| Symbol | Value |
|---|---|
| I | 1 |
| V | 5 |
| X | 10 |
| L | 50 |
| C | 100 |
| D | 500 |
| M | 1000 |
Six subtractive combinations cover the 4s and 9s: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900. A smaller symbol before a larger one is subtracted — so 2024 becomes MMXXIV.
Worked Example
2024 → 2000 + 20 + 4 → MMXXIV. 49 → 40 + 9 → XLIX (not IL). MCMXCIX → 1000 + 900 + 90 + 9 → 1999.
Our Testing Process
Every DaProfitClub tool is tested before publishing. We verify conversions in both directions against reference Roman numeral charts, test edge cases (1, 3999, and invalid or non-standard inputs), and confirm the tool works on desktop and mobile browsers.
Frequently Asked Questions
What are Roman numerals?
Roman numerals are the letter-based number system of ancient Rome. Seven symbols — I, V, X, L, C, D, M — are combined, mostly by adding (XX = 20), with subtractive pairs like IV for 4 and IX for 9.
What is the largest number in Roman numerals?
In standard form the largest is 3,999 (MMMCMXCIX). Romans sometimes drew a bar over a symbol to multiply it by 1,000, but this converter covers the standard 1–3999 range.
Why is there no zero in Roman numerals?
The Roman system was developed before the concept of zero reached Europe. It was a counting system for trade and records, not a place-value system, so a symbol for zero was never needed.
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Last updated: October 1, 2026