Roman Numeral — XLIII (43) — free printable diagram

What is XLIII in Roman numerals?

XLIII is the Roman numeral for 43 — forty-three. Written the other way round, 43 in Roman numerals is XLIII.

Roman numeral

XLIII

Number

43

In words

forty-three

Symbols used

I = 1, X = 10, L = 50

Written as

XL (40) + I (1) + I (1) + I (1)

• XLIII is built from XL (40) + I (1) + I (1) + I (1), which adds up to 43.
• XL uses the subtraction rule: a smaller symbol before a larger one is taken away, so X before L means 50 − 10 = 40.
• Roman numerals are read from left to right, adding each symbol as you go, except where the subtraction rule applies.