MM to CM Converter
Convert between Millimeters and Centimeters instantly
| Amount | Centimeter |
|---|---|
| 1 mm | 0.1 cm |
| 2 mm | 0.2 cm |
| 5 mm | 0.5 cm |
| 10 mm | 1 cm |
| 25 mm | 2.5 cm |
| 50 mm | 5 cm |
| 100 mm | 10 cm |
| 500 mm | 50 cm |
| 1,000 mm | 100 cm |
About Millimeters and Centimeters
Millimeter (mm) is a unit of length in the metric system equal to one thousandth of a meter (1/1000 m). It is commonly used for small measurements like the thickness of materials, small components and precision engineering.
Centimeter (cm) is a unit of length in the metric system equal to one hundredth of a meter (1/100 m). It is commonly used for everyday measurements like height, the length of objects and clothing sizes.
Conversion Formulas:
- Millimeters to Centimeters: cm = mm ÷ 10
- Centimeters to Millimeters: mm = cm × 10
Common Conversions:
- 1 mm = 0.1 cm
- 5 mm = 0.5 cm
- 10 mm = 1 cm
- 25.4 mm = 2.54 cm (1 inch)
- 100 mm = 10 cm
More Length Unit Converters
Explore more length conversions, including meters, feet, inches, centimeters, kilometers and miles, for fast, accurate results every time.
MM to CM Converter: Millimeters to Centimeters and Back
Instantly convert millimeters to centimeters and vice versa with this easy-to-use online tool. It gives accurate results for engineering, crafting, construction and everyday use, and updates as you type or move the slider.
Quick answer: 1 centimeter is exactly 10 millimeters, so 10 mm is 1 cm, 25 mm is 2.5 cm and 50 mm is 5 cm. To convert millimeters to centimeters, divide by 10.
About MM to CM
Millimeters (mm) and centimeters (cm) are metric units of length. One centimeter equals 10 millimeters. Millimeters are used for very small measurements such as material thickness, components or precision work, while centimeters are used for everyday measurements like object dimensions, height and craft projects.
Definitions
Millimeter (mm): 1/1000 of a meter, a small unit for precise measurements.
Centimeter (cm): 1/100 of a meter, commonly used for lengths and dimensions.
Formulas
Examples: 10 mm = 1 cm. 25 mm = 2.5 cm. 50 mm = 5 cm. 2.54 cm = 25.4 mm (1 inch).
MM to CM Chart
These values are exact, so they match the converter above:
| Millimeters | Centimeters |
|---|---|
| 1 mm | 0.1 cm |
| 2 mm | 0.2 cm |
| 5 mm | 0.5 cm |
| 10 mm | 1 cm |
| 15 mm | 1.5 cm |
| 20 mm | 2 cm |
| 25 mm | 2.5 cm |
| 25.4 mm | 2.54 cm |
| 30 mm | 3 cm |
| 50 mm | 5 cm |
| 100 mm | 10 cm |
| 500 mm | 50 cm |
| 1000 mm | 100 cm |
| Centimeters | Millimeters |
|---|---|
| 0.1 cm | 1 mm |
| 0.5 cm | 5 mm |
| 1 cm | 10 mm |
| 2 cm | 20 mm |
| 2.5 cm | 25 mm |
| 5 cm | 50 mm |
| 10 cm | 100 mm |
| 15 cm | 150 mm |
| 30 cm | 300 mm |
| 100 cm | 1,000 mm |
Everyday Sizes in MM and CM
Specifications often mix the two units, so these common sizes are handy:
| Everyday size | Millimeters | Centimeters |
|---|---|---|
| Credit card width | 85.6 mm | 8.56 cm |
| Smartphone thickness | 8 mm | 0.8 cm |
| AA battery length | 50 mm | 5 cm |
| Standard pencil width | 7 mm | 0.7 cm |
| A4 paper width | 210 mm | 21 cm |
| US dime diameter | 17.9 mm | 1.79 cm |
If you need inches, the CM to inches converter and the inches to MM converter do that directly, and the length converter and the unit converter cover every other unit.
Who Uses It?
Engineers, architects and designers use it for precise measurements, and students use it for school projects and homework. Craft and DIY enthusiasts use it for small-scale projects, and construction and manufacturing professionals use it on drawings and parts.
How to Use the MM to CM Converter
Choose the units
Select the From unit (mm or cm) and the To unit (cm or mm), or use the MM to CM and CM to MM tabs.
Enter the value
Type the value in the input box, or move the slider.
Read the result
Click Convert, or just see the result update instantly.
Reverse if needed
Use the swap button to quickly reverse the conversion.