1 in = 25.4 mm. Free Inch to Millimeter converter with the formula, a worked example and a table of common values.
1 in = 25.4 mm. To convert Inch to Millimeter, multiply by 25.4.
To convert 5 in to mm, multiply by 25.4: 5 × 25.4 = 127 mm.
| in | mm |
|---|---|
| 1 | 25.4 |
| 2 | 50.8 |
| 3 | 76.2 |
| 4 | 101.6 |
| 5 | 127 |
| 6 | 152.4 |
| 7 | 177.8 |
| 8 | 203.2 |
| 9 | 228.6 |
| 10 | 254 |
| 15 | 381 |
| 20 | 508 |
| 25 | 635 |
| 30 | 762 |
| 40 | 1,016 |
| 50 | 1,270 |
| 75 | 1,905 |
| 100 | 2,540 |
| 250 | 6,350 |
| 500 | 12,700 |
| 1,000 | 25,400 |
| mm | in |
|---|---|
| 1 | 0.03937008 |
| 2 | 0.07874016 |
| 3 | 0.1181102 |
| 4 | 0.1574803 |
| 5 | 0.1968504 |
| 6 | 0.2362205 |
| 7 | 0.2755906 |
| 8 | 0.3149606 |
| 9 | 0.3543307 |
| 10 | 0.3937008 |
| 15 | 0.5905512 |
| 20 | 0.7874016 |
| 25 | 0.984252 |
| 30 | 1.181102 |
| 40 | 1.574803 |
| 50 | 1.968504 |
| 75 | 2.952756 |
| 100 | 3.937008 |
| 250 | 9.84252 |
| 500 | 19.68504 |
| 1,000 | 39.37008 |