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MM to CM converter
Enter a number, fraction, power, π, or arithmetic expression.1 mm = 0.1 cm centimeters = millimeters ÷ 10
Ready for local conversionMM to CM formula
centimeters = millimeters ÷ 10
1 millimeter = exactly 0.1 centimeter
The metric prefixes define one centimeter as 10 millimeters: centi means one hundredth of a meter and milli means one thousandth.
How to convert Millimeters to Centimeters
Divide millimeters by 10, which moves the decimal point one place to the left. No approximation is involved.
Example calculation
A 125 mm measurement is 12.5 cm: 125 ÷ 10 = 12.5.
125 mm = 12.5 cm
When this conversion is useful
Millimeters to centimeters is common for craft dimensions, rainfall, small product measurements, schoolwork, and rewriting technical sizes in a more readable metric unit.
Common Millimeters to Centimeters conversions
| Millimeters (mm) | Centimeters (cm) |
|---|---|
| 1 | 0.1 |
| 5 | 0.5 |
| 10 | 1 |
| 25 | 2.5 |
| 100 | 10 |
| 1000 | 100 |
MM to CM FAQ
There are exactly 10 millimeters in one centimeter.
Divide the millimeter value by 10. The numerical value gets smaller because centimeters are the larger unit.
Yes. Both units are defined from the meter by powers of ten, so the 10-to-1 relationship is exact.