Roman Numeral — XXIII (23) — free printable diagram

What is XXIII in Roman numerals?

XXIII is the Roman numeral for 23 — twenty-three. Written the other way round, 23 in Roman numerals is XXIII.

Roman numeral

XXIII

Number

23

In words

twenty-three

Symbols used

I = 1, X = 10

Written as

X (10) + X (10) + I (1) + I (1) + I (1)

• XXIII is built from X (10) + X (10) + I (1) + I (1) + I (1), which adds up to 23.
• Roman numerals are read from left to right, adding each symbol as you go, except where the subtraction rule applies.