429 in Roman numerals

The number 429 is written in Roman numerals like this: CDXXIX

CDXXIX = 429

How to write 429 in Roman numerals

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

• 400 = CD (500 − 100)
• 20 = XX
• 9 = IX (10 − 1)

Put the parts together: CD + XX + IX = CDXXIX.

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

Going the other way? See the Roman numeral CDXXIX.

Previous number

428 in Roman numerals: CDXXVIII

Next number

430 in Roman numerals: CDXXX

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