Convert centimeters to millimeters instantly with our free online tool
Our CM to MM converter provides instant, accurate conversions between centimeters and millimeters. Whether you're working on a school project, DIY task, or professional measurement, this tool makes the conversion process simple and error-free.
A centimeter is a unit of length in the metric system equal to one hundredth of a meter. The centimeter is commonly used for everyday measurements where a meter would be too large, such as measuring the height of a person or the length of a pencil.
A millimeter is a unit of length in the metric system equal to one thousandth of a meter (or one tenth of a centimeter). Millimeters are used for precise measurements, such as the thickness of paper or small mechanical parts.
The conversion between centimeters and millimeters is straightforward because both units are part of the metric system:
1 centimeter (cm) = 10 millimeters (mm)
To convert centimeters to millimeters, simply multiply the centimeter value by 10.
How many millimeters are in a centimeter?
There are exactly 10 millimeters in 1 centimeter. This conversion is consistent because both units are part of the metric system which uses base-10 conversions.
Is 10 mm equal to 1 cm?
Yes, 10 millimeters is exactly equal to 1 centimeter. This is the fundamental relationship between these two metric units of length.
How do you convert 5 cm to mm?
To convert 5 cm to mm, multiply by 10: 5 cm × 10 = 50 mm. You can also use our converter above by entering "5" in the centimeter field.
Which is bigger, cm or mm?
Centimeters are larger than millimeters. There are 10 millimeters in every centimeter, so 1 cm is 10 times bigger than 1 mm.
When should I use cm vs mm?
Use centimeters for everyday measurements (like clothing sizes or furniture dimensions) and millimeters when you need more precision (like engineering drawings or small craft projects). Our converter works for both small and large values.
Here's a quick reference table for common centimeter to millimeter conversions:
| Centimeters (cm) | Millimeters (mm) |
|---|---|
| 0.1 cm | 1 mm |
| 0.5 cm | 5 mm |
| 1 cm | 10 mm |
| 2 cm | 20 mm |
| 5 cm | 50 mm |
| 10 cm | 100 mm |
| 20 cm | 200 mm |
| 50 cm | 500 mm |
| 100 cm | 1000 mm |