Skip to main content

Ⅻ Roman Numerals

Convert between decimal numbers and Roman numerals · 1 through 3999, with additive and subtractive logic shown.

2024 = MMXXIV

How it works

Roman numerals use seven letters (I, V, X, L, C, D, M). Larger before smaller adds (VI = 6); smaller before larger subtracts (IV = 4). Subtractive pairs are limited to IV, IX, XL, XC, CD, CM.

Breakdown: M (1000) + M (1000) + X (10) + X (10) + IV (4)

MemPi
Play on your next flight · works offline
Add PlayMemorize to your home screen
In Safari, tap Share , then choose “Add to Home Screen”.