Convert Millimeters (mm) to Centimeters (cm)
Millimetres (mm) to centimetres (cm) is a quick metric step used in DIY, sewing, and reading rulers and technical drawings.
Formula
1 mm = 0.1 cm
To convert mm to cm, divide the value by 10.
Conversion Table
| Millimeters (mm) | Centimeters (cm) |
|---|---|
| 0.01 mm | 0.001 cm |
| 0.1 mm | 0.01 cm |
| 0.5 mm | 0.05 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 |
| 15 mm | 1.5 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 |
| 1000 mm | 100 cm |
| 2500 mm | 250 cm |
| 5000 mm | 500 cm |
| 10000 mm | 1000 cm |
| 50000 mm | 5000 cm |
Common mm to cm Examples
- 1 mm = 0.1 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
- 1000 mm = 100 cm
About mm to cm
1 cm = 10 mm, so to go from mm to cm you divide by 10: 25 mm = 2.5 cm and 150 mm = 15 cm.
On a ruler the small lines are millimetres and the numbered lines are centimetres — there are exactly 10 mm between each cm mark.
Frequently Asked Questions
How many mm are in a cm?
There are 10 millimetres in 1 centimetre.
What is 5 mm in cm?
5 mm equals 0.5 cm.
Where does the unit cm come from?
Centimeters is a Length unit with its own historical and regional roots, now defined in relation to internationally agreed reference standards.
Where does the unit mm come from?
Millimeters is a standard Length unit used in specific regions or fields. Its definition has been refined over time to match international measurement standards.
Is the conversion from mm to cm exact?
The ratio 0.1 is defined to high precision and is exact for most practical purposes. Rounding only matters when many decimal places are needed.
How do I convert mm to cm by hand?
Take the value in mm and divide the value by 10. The result is the same value expressed in cm.
What is the formula to convert mm to cm?
The formula is 1 mm = 0.1 cm. To convert any value, divide the value by 10.
How much is 1 mm in cm?
1 mm equals 0.1 cm. This ratio applies to every conversion between the two units.