Convert inches to millimetres. 1 in = 25.4 mm.
Type how many inches you have.
The millimetres appear at once, with all the other units of the same kind listed beside them.
Use the swap button to convert millimetres to inches instead.
| in | mm |
|---|---|
| 1 | 25.4 |
| 2 | 50.8 |
| 5 | 127 |
| 10 | 254 |
| 20 | 508 |
| 50 | 1270 |
| 100 | 2540 |
| 500 | 12700 |
| 1,000 | 25400 |
Multiply the number of inches by 25.4. To go back, multiply millimetres by 0.03937008, or use the converter the other way round.
1 in = 25.4 mm.
10 in = 254 mm.
The factor is exact or accurate to more digits than shown. The result is shown to 12 significant digits.
No. The conversion runs in your browser.