45 in Roman numerals

The number 45 is written in Roman numerals like this: XLV

XLV = 45

How to write 45 in Roman numerals

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

• 40 = XL (50 − 10)
• 5 = V

Put the parts together: XL + V = XLV.

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

Going the other way? See the Roman numeral XLV.

Previous number

44 in Roman numerals: XLIV

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46 in Roman numerals: XLVI

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