About millimetres and inches
A millimetre (mm) is one thousandth of a metre. It is used for small measurements in engineering, manufacturing and rainfall.
An inch (in) is an imperial and US unit of length. There are 12 inches in a foot, and one inch is exactly 2.54 centimetres.
How the conversion works
Converts millimetres to inches, and back again. Type a value in either box and the other one updates as you type. The conversion uses 1 millimetre = 0.0393701 inches.
Millimetre to Inch conversion table
| millimetres | inches |
|---|---|
| 1 millimetre | 0.0393701 inches |
| 2 millimetres | 0.0787402 inches |
| 5 millimetres | 0.19685 inches |
| 10 millimetres | 0.393701 inches |
| 25 millimetres | 0.984252 inches |
| 50 millimetres | 1.9685 inches |
| 100 millimetres | 3.93701 inches |
| 1,000 millimetres | 39.3701 inches |
How to use it
- Enter a value in millimetres to see it in inches, 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 millimetres by 0.0393701.
Did you know?
- A standard bank card is 0.76 millimetres thick.
- The inch was fixed at exactly 2.54 centimetres by an international agreement in 1959.