Updated June 17, 2026
Try the Percentage Calculator
Instant answers for any percentage problem: find the percent, the part, or the whole in one click.
Roman numerals use 7 letters to represent numbers. Symbols placed in descending order are added together; a smaller symbol placed before a larger one is subtracted. So IV = 4 (5 minus 1) and IX = 9 (10 minus 1).
The 7 base symbols
| Symbol | Value | Symbol | Value |
|---|---|---|---|
| I | 1 | L | 50 |
| V | 5 | C | 100 |
| X | 10 | D | 500 |
| M | 1,000 |
The 7 rules of Roman numerals
- Symbols are written largest to smallest, left to right.
- A smaller symbol before a larger one is subtracted (IV = 4, XL = 40).
- Only I, X, and C can be used as the subtractive numeral.
- No symbol is repeated more than three times in a row (III = 3, but IIII is not standard).
- V, L, and D are never repeated or used subtractively.
- Only one smaller symbol can precede a larger one for subtraction.
- Subtractive I goes before V and X only; X before L and C only; C before D and M only.
Why does L stand for 50?
The exact origin is debated. L likely evolved from an early tally mark for 50 in the Roman counting system, later standardized to the letter when Roman numerals were formalized. It was not always a letter.
What does 69 mean in Roman?
69 in Roman numerals is LXIX. Break it down: L (50) + X (10) + IX (9) = 69.
Common Roman numerals quick reference
IV = 4, IX = 9, XL = 40, XLIX = 49, L = 50, XC = 90, C = 100, CD = 400, D = 500, CM = 900, M = 1,000, MMXXVI = 2026. Use the Roman Numeral Converter for any number instantly. See also percentage calculations for another numbers explainer.
Try the Percentage Calculator
Instant answers for any percentage problem: find the percent, the part, or the whole in one click.