1421 in Roman numerals

The number 1421 is written in Roman numerals like this: MCDXXI

MCDXXI = 1421

How to write 1421 in Roman numerals

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

• 1000 = M
• 400 = CD (500 − 100)
• 20 = XX
• 1 = I

Put the parts together: M + CD + XX + I = MCDXXI.

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

As a year, 1421 is written MCDXXI. You often see dates like this in film credits, on buildings and on monuments.

Going the other way? See the Roman numeral MCDXXI.

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1420 in Roman numerals: MCDXX

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1422 in Roman numerals: MCDXXII

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