Millimeters to Centimeters Converter
Convert millimeters to centimeters instantly. 1 mm = 0.1 cm. Free two-way converter with the formula and a quick reference table.
How to convert millimeters to centimeters
centimeters = millimeters × 0.1
One millimeter equals 0.1 centimeters, so to convert millimeters to centimeters you multiply by 0.1. Going the other way, one centimeter is 10 millimeters. Both units measure length, so the conversion is an exact ratio that never changes.
10 millimeters = 1 centimeters. Multiply your millimeter figure by the factor above (or just type it into the box) to convert any amount.
millimeters to centimeters table
| millimeters (mm) | centimeters (cm) |
|---|---|
| 1 | 0.1 |
| 2 | 0.2 |
| 3 | 0.3 |
| 5 | 0.5 |
| 10 | 1 |
| 20 | 2 |
| 25 | 2.5 |
| 50 | 5 |
| 100 | 10 |
| 250 | 25 |
| 500 | 50 |
| 1,000 | 100 |
Frequently asked questions
How many centimeters are in a millimeter?
One millimeter equals 0.1 centimeters. So to convert, multiply the number of millimeters by 0.1.
How do I convert millimeters to centimeters?
Multiply by 0.1, or simply enter the value in the converter above — it does the math instantly and works both ways.
Is this conversion exact?
Yes — both units measure the same quantity, so the ratio is fixed and this uses the standard internationally-agreed factor.