Numerals · Converter
Roman Numeral Converter – Convert Numbers and Roman Numerals
Free online Roman numeral converter. Instantly convert numbers to Roman numerals and Roman numerals to numbers. Supports values from 1 to 3,999 with full validation.
Roman Numeral Converter – Convert Numbers and Roman Numerals
Number → Roman Numeral
Whole numbers from 1 to 3,999.
Result
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Roman Numeral Reference Chart
Basic Symbols
| Roman Numeral | Number |
|---|---|
| I | 1 |
| V | 5 |
| X | 10 |
| L | 50 |
| C | 100 |
| D | 500 |
| M | 1,000 |
Subtractive Combinations
| Roman Numeral | Number |
|---|---|
| IV | 4 |
| IX | 9 |
| XL | 40 |
| XC | 90 |
| CD | 400 |
| CM | 900 |
How Roman Numerals Work
Roman numerals use seven main symbols, each representing a fixed value:
- I = 1
- V = 5
- X = 10
- L = 50
- C = 100
- D = 500
- M = 1,000
Symbols are normally added from left to right. However, when a smaller symbol appears before a larger symbol, the smaller value is subtracted from the larger one. This is called subtractive notation and keeps numerals shorter.
Examples
- VIII = 5 + 1 + 1 + 1 = 8
- XIV = 10 + 4 = 14
- XL = 50 − 10 = 40
- XC = 100 − 10 = 90
- CM = 1,000 − 100 = 900