Convert centimeters to millimeters
Centimeter (cm) to millimeter (mm). One centimeter equals 10 millimeters.
Formula
Centimeter to millimeter conversion table
| Centimeters | Millimeters | Millimeters | Centimeters |
|---|---|---|---|
| 1 cm | 10 mm | 1 mm | 0.1 cm |
| 2 cm | 20 mm | 2 mm | 0.2 cm |
| 3 cm | 30 mm | 3 mm | 0.3 cm |
| 5 cm | 50 mm | 5 mm | 0.5 cm |
| 10 cm | 100 mm | 10 mm | 1 cm |
| 20 cm | 200 mm | 20 mm | 2 cm |
| 50 cm | 500 mm | 50 mm | 5 cm |
| 100 cm | 1000 mm | 100 mm | 10 cm |
| 500 cm | 5000 mm | 500 mm | 50 cm |
| 1000 cm | 10000 mm | 1000 mm | 100 cm |
To convert centimeters to millimeters, multiply the number of centimeters by 10. One centimeter equals 10 millimeters, and one millimeter equals 0.1 centimeters, so the relationship is fixed and exact. As a worked example, 10 cm comes to 100 mm. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a length conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common centimeter values already worked out in millimeters, plus the reverse millimeter to centimeter direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many millimeters are in a centimeter?
One centimeter equals 10 millimeters. The ratio is constant, so you can multiply any number of centimeters by 10 to get millimeters.
What is the formula to convert centimeters to millimeters?
Use millimeters = centimeters × 10. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert millimeters back to centimeters?
Go the other way by using one millimeter equals 0.1 centimeters. You can also press the swap button in the converter above to flip the direction in one click.
Is this centimeter to millimeter converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.