Millimeters to Centimeters
A millimeter is one thousandth of a meter, the standard unit on rulers and rainfall gauges worldwide. A centimeter is one hundredth of a meter, commonly used for paper sizes and human height in metric countries. 1 mm equals 0.1 cm, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to length, measured here against length's base unit (m) — every other length unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
cm = mm × 0.1
mm = cm × 10
Worked example: 5 mm × 0.1 = 0.5 cm.
Conversion table
| Millimeter (mm) | Centimeter (cm) |
|---|---|
| 1 mm | 0.1 cm |
| 2 mm | 0.2 cm |
| 3 mm | 0.3 cm |
| 5 mm | 0.5 cm |
| 10 mm | 1 cm |
| 20 mm | 2 cm |
| 25 mm | 2.5 cm |
| 50 mm | 5 cm |
| 100 mm | 10 cm |
| 250 mm | 25 cm |
| 500 mm | 50 cm |
| 1,000 mm | 100 cm |
Frequently asked
- How many Centimeters in a millimeter?
- 1 mm equals 0.1 cm.
- How do I convert Millimeters to Centimeters?
- Multiply the value in mm by 0.1 to get cm. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Millimeter and Centimeter are both defined by a fixed conversion factor to length's base unit (m), so the result shown is exact to the precision displayed, not an approximation.