Number to Roman Numerals
Convert numbers to Roman numerals instantly. Free number to Roman numeral converter.
Roman Numeral
XLII
Roman Numeral Reference
| Roman Numeral | Decimal Value |
|---|---|
| I | 1 |
| V | 5 |
| X | 10 |
| L | 50 |
| C | 100 |
| D | 500 |
| M | 1000 |
Common Examples
| Number | Roman Numeral |
|---|---|
| 1 | I |
| 4 | IV |
| 9 | IX |
| 27 | XXVII |
| 49 | XLIX |
| 99 | XCIX |
| 444 | CDXLIV |
| 1994 | MCMXCIV |
| 3999 | MMMCMXCIX |
How to Convert Numbers to Roman Numerals
Roman numerals use seven base symbols: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Combine them by addition (II=2, XII=12, MCC=1200) or subtraction when a smaller symbol precedes a larger one (IV=4, IX=9, XL=40, XC=90, CD=400, CM=900). The system has no zero.
Most modern uses: book/movie sequel numbering (Star Wars: Episode IV), Super Bowl labels (Super Bowl LVIII = 58), monarch names (Queen Elizabeth II), clock faces, copyright dates. Maximum standard numeric is 3999 (MMMCMXCIX); larger numbers historically used various extensions but no single accepted system.
Common Numbers to Roman Numerals
| Number | Roman Numeral |
|---|---|
| 1 | I |
| 4 | IV |
| 9 | IX |
| 50 | L |
| 100 | C |
| 500 | D |
| 1000 | M |
| 2024 | MMXXIV |
Frequently Asked Questions
Why no zero?
Romans didn't conceptualise zero as a number. Roman numerals predate the Arabic-Hindu zero by centuries. The lack of zero makes Roman arithmetic harder than positional decimal systems - one of the reasons for the eventual switch to Arabic numerals in Europe (around 13th century).
What's IIII vs IV?
Both used historically. IV is the standard subtractive form (5-1=4). IIII appears on clock faces (a stylistic exception). Both technically valid; subtractive notation (IV) became standard from the Middle Ages onwards for written numbers.