Convert Centimeter to Millimeter
Use this free converter to change centimeters (cm) into millimeters (mm). Centimeter and millimeter both measure length. As a quick reference, 1 cm equals 10 mm, and 1 mm equals 0.1 cm.
Free · runs in your browser · no sign-up
Millimeter (mm)
10
1 cm = 10 mm
Length conversion table
| Centimeter | Millimeter |
|---|---|
| 0.01 | 0.1 |
| 0.1 | 1 |
| 0.5 | 5 |
| 1 | 10 |
| 2 | 20 |
| 3 | 30 |
| 5 | 50 |
| 10 | 100 |
| 20 | 200 |
| 25 | 250 |
| 50 | 500 |
| 100 | 1000 |
| 1,000 | 10000 |
How to convert Centimeter to Millimeter
Multiply the centimeter value by 10 to get millimeters.
- Enter the number of centimeters you want to convert.
- The converter instantly shows the equivalent value in millimeters.
- Worked example: 15 cm × 10 = 150 mm.
- Use the swap button to reverse the conversion (millimeter to centimeter).
About these units
Centimeter (cm)
- Definition
- A centimeter (cm) is one hundredth of a meter, a convenient metric unit for everyday measurements like height and paper sizes.
- History
- It dates from the original metric system and uses the SI prefix "centi-" (one hundredth).
- Current use
- Centimeters are used for body measurements, rainfall, screen and print dimensions, and school maths across the metric world.
Millimeter (mm)
- Definition
- A millimeter (mm) is one thousandth of a meter, used where small, precise measurements are needed.
- History
- Like other metric subdivisions it was defined in the 1790s using the prefix "milli-" (one thousandth).
- Current use
- Engineers, machinists, and manufacturers specify tolerances in millimeters, and rainfall is commonly reported in mm.
Frequently asked questions
How many millimeters are in a centimeter?
There are 10 mm in 1 cm. To convert, multiply the number of centimeters by 10.
How do I convert centimeters to millimeters?
Multiply the centimeter value by 10 to get millimeters. For example, 10 cm = 100 mm.
Is this centimeter-to-millimeter converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Centimeter to other length units
| Unit | 1 Centimeter equals |
|---|---|
| Meter (m) | 0.01 m |
| Kilometer (km) | 0.00001 km |
| Millimeter (mm) | 10 mm |
| Micrometer (µm) | 10000 µm |
| Nanometer (nm) | 10000000 nm |
| Mile (mi) | 0.0000062137119 mi |
| Yard (yd) | 0.010936133 yd |
| Foot (ft) | 0.032808399 ft |
| Inch (in) | 0.39370079 in |
| Nautical Mile (nmi) | 0.000005399568 nmi |
| Light Year (ly) | 1.0570e-18 ly |