Millimeters to inches
Type a value in either field to convert between millimeters and inches.
1 mm = 0.0393701 in
How to convert millimeters to inches
Multiply the value in millimeters by 0.0393701 to get inches.
Example: 10 mm = 0.393701 in.
The inch is defined as exactly 25.4 millimeters (international agreement of 1959).
Frequently asked questions
How many inches are in a millimeter?
1 mm equals 0.0393701 in.
How to convert millimeters to inches
Multiply the value in millimeters by 0.0393701 to get inches.
Are these conversions exact?
Yes. They use the international definitions of each unit; results are rounded only for display.
| millimeters (mm) | inches (in) |
|---|---|
| 1 | 0.0393701 |
| 2 | 0.0787402 |
| 3 | 0.11811 |
| 4 | 0.15748 |
| 5 | 0.19685 |
| 6 | 0.23622 |
| 7 | 0.275591 |
| 8 | 0.314961 |
| 9 | 0.354331 |
| 10 | 0.393701 |
| 12 | 0.472441 |
| 15 | 0.590551 |
| 20 | 0.787402 |
| 25 | 0.984252 |
| 30 | 1.1811 |
| 40 | 1.5748 |
| 50 | 1.9685 |
| 60 | 2.3622 |
| 70 | 2.75591 |
| 75 | 2.95276 |
| 80 | 3.14961 |
| 90 | 3.54331 |
| 100 | 3.93701 |
| 150 | 5.90551 |
| 200 | 7.87402 |
| 250 | 9.84252 |
| 500 | 19.685 |
| 1,000 | 39.3701 |