Convert centimeters to millimeters
1 cm = 10 mm. Change the amount below, or read the formula and the reference table further down.
1 centimeter equals
millimeters
1 cm = 10 mm
The formula
Centimeters and millimeters both measure length from the same zero, so a single multiplier does the job.
mm = cm × 10
Going the other way? Convert millimeters to centimeters.
Centimeters to millimeters table
Common values, rounded for reading.
| Centimeters (cm) | Millimeters (mm) |
|---|---|
| 1 | 10 |
| 2 | 20 |
| 3 | 30 |
| 4 | 40 |
| 5 | 50 |
| 6 | 60 |
| 7 | 70 |
| 8 | 80 |
| 9 | 90 |
| 10 | 100 |
| 15 | 150 |
| 20 | 200 |
| 25 | 250 |
| 30 | 300 |
| 40 | 400 |
| 50 | 500 |
| 75 | 750 |
| 100 | 1,000 |
| 250 | 2,500 |
| 500 | 5,000 |
| 1,000 | 10,000 |
Questions people ask
- How many millimeters are in a centimeter?
- One centimeter equals 10 millimeters.
- How do I convert centimeters to millimeters by hand?
- Multiply the number of centimeters by 10. For a rough check, 10 is close enough for most everyday use.
- What is 1 centimeter in millimeters?
- 1 centimeter is 10 millimeters.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.