How it's calculated
mm = cm × 10
cm = centimetres, mm = millimetres. Reverse: cm = mm ÷ 10.
Common values
| Centimeters | Millimeters |
|---|---|
| 1 cm | 10 mm |
| 2.5 cm | 25 mm |
| 10 cm | 100 mm |
| 100 cm | 1000 mm |
Common questions
How many millimeters are in a centimeter?
Exactly 10 millimeters.
How do I convert cm to mm in my head?
Just add a zero, or move the decimal point one place to the right. So 4.7 cm is 47 mm.