Centimetres to Millimetres

Convert cm to mm instantly — formula, worked examples and a conversion table of common values.

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About the Centimetres to Millimetres

Convert centimetres (cm) to millimetres (mm). Enter a value on either side and the other updates instantly — nothing is sent to a server.

One centimetre equals 10 mm. The table below lists the values people look up most often, and each one links to a page with the worked calculation.

mm = cm × 10

How many millimetres are in 1 centimetre?

1 centimetre = 10 mm.

What is 10 cm in millimetres?

10 cm = 100 mm.

What is 100 cm in millimetres?

100 cm = 1,000 mm.

How do I convert centimetres to millimetres?

Use the formula mm = cm × 10. Or type any value into the converter above — it works in both directions.