Cm to Mm Calculator
1 cm = 10 mm. Click any i for detail.
Length
Convert
i
Direction
Centimeters to millimeters, or reverse. |
|
|---|---|
Value
i
Input
Length to convert. |
How to use this calculator
- Pick cm → mm or mm → cm.
- Enter the length.
- Read mm, cm, and inches in the breakdown.
- Use inches when comparing to US rulers.
Results explained
Centimeters and millimeters differ by a factor of 10. Inches use 2.54 cm per inch. Meters are cm divided by 100.
Quick reference: cm ↔ mm
12.5 cm = 125 mm = 4.92 in.
| Item | Detail |
|---|---|
| cm → mm | × 10 |
| mm → cm | ÷ 10 |
| cm → in | ÷ 2.54 |
| m | cm / 100 |
Feet and inches height uses the height calculator.
How the estimate is built
mm = cm × 10; in = cm / 2.54.
Example scenario
12.5 cm → 125 mm.
FAQ
Which is bigger, cm or mm?
A centimeter is ten millimeters.
Why show inches?
Many US tape measures are dual labeled.
Can I convert km here?
No. Use a km/miles page for long distances.