42 in Roman numerals

The number 42 is written in Roman numerals like this: XLII

XLII = 42

How to write 42 in Roman numerals

Split the number by place value and write each part in Roman numerals:

• 40 = XL (50 − 10)
• 2 = II

Put the parts together: XL + II = XLII.

When a smaller symbol comes before a larger one, it is subtracted.

Going the other way? See the Roman numeral XLII.

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41 in Roman numerals: XLI

Next number

43 in Roman numerals: XLIII

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