Millimeter to Centimeter
1 mm =0.1cm
About Millimeter to Centimeter
Millimeters and centimeters are both everyday metric length units, and there are exactly 10 millimeters in a centimeter. Converting between them is routine when reading a ruler, following engineering drawings, sewing, or working with small parts where measurements are quoted in millimeters but you think in centimeters.
To convert millimeters to centimeters, divide the value in millimeters by 10 (or multiply by 0.1). Centimeters = Millimeters ÷ 10.
For example, 25 mm ÷ 10 = 2.5 cm. A 25 mm bolt is 2.5 centimeters long.
Millimeter to Centimeter table
| Millimeter (mm) | Centimeter (cm) |
|---|---|
| 1 | 0.1 |
| 5 | 0.5 |
| 10 | 1 |
| 25 | 2.5 |
| 50 | 5 |
| 100 | 10 |
| 150 | 15 |
| 200 | 20 |
| 500 | 50 |
| 1,000 | 100 |
Common use cases
- 01Reading rulers and calipers marked in millimeters
- 02Following technical and engineering drawings
- 03Sewing, crafts, and model-making measurements
- 04Converting part and hardware dimensions
A bit of history
Both units come from the metric system introduced in France in the 1790s, which defines length as decimal fractions of the meter: a millimeter is one-thousandth of a meter and a centimeter is one-hundredth.
Frequently asked questions
How many cm are in a mm?+
1 millimeter equals 0.1 centimeters.
How many mm are in a cm?+
1 centimeter equals exactly 10 millimeters.
Is 10 mm equal to 1 cm?+
Yes — 10 millimeters is exactly 1 centimeter.
How many cm is 100 mm?+
100 millimeters equals 10 centimeters.
Need the reverse?
Convert Centimeter to Millimeter →