About centimetres and millimetres
A centimetre (cm) is one hundredth of a metre. It is the everyday unit for body height, clothing sizes and small objects.
A millimetre (mm) is one thousandth of a metre. It is used for small measurements in engineering, manufacturing and rainfall.
How the conversion works
Converts centimetres to millimetres, and back again. Type a value in either box and the other one updates as you type. The conversion uses 1 centimetre = 10 millimetres.
Centimetre to Millimetre conversion table
| centimetres | millimetres |
|---|---|
| 1 centimetre | 10 millimetres |
| 2 centimetres | 20 millimetres |
| 5 centimetres | 50 millimetres |
| 10 centimetres | 100 millimetres |
| 25 centimetres | 250 millimetres |
| 50 centimetres | 500 millimetres |
| 100 centimetres | 1,000 millimetres |
| 1,000 centimetres | 10,000 millimetres |
How to use it
- Enter a value in centimetres to see it in millimetres, or type in the other box to convert the opposite way.
- Check the quick conversion table below for common values.
- To convert by hand, multiply the number of centimetres by 10.
Did you know?
- A centimetre is about the width of a fingernail.
- A standard bank card is 0.76 millimetres thick.