Roman Numbers

Tap any number to see how it's built and hear it, or test yourself with the Practice Quiz.

Symbols

1 - 100

Hundreds & Thousands

Hundreds

Thousands

Levels

Go through every item in a level, then unlock the next.

Practice Quiz

Pick which topics to include, then how many questions you want.

Questions:

Quiz Complete!

Rules

1. Never repeat a symbol more than 3 times

IIII ✗→IV ✓

2. A smaller symbol before a bigger one subtracts -- and can't be repeated

IX→10 − 1 = 9

IV→5 − 1 = 4

XL→50 − 10 = 40

3. A smaller symbol after a bigger one adds

XI→10 + 1 = 11

XII→10 + 1 + 1 = 12

XIII→10 + 1 + 1 + 1 = 13

4. V, L, and D can never repeat -- not even twice

V V ✗→use X ✓ instead

Number → Roman Converter

Type any whole number from 1 to 10,000 to see its Roman numeral.