Uses the exact factor 1 inch = 25.4 mm. For workshop use, remember that a decimal answer usually needs rounding to the nearest sixteenth or thirty-second before any tool can cut it.
| mm | inches | inches | mm |
|---|---|---|---|
| 1 | 0.0394 | 0.125 | 3.175 |
| 5 | 0.1969 | 0.25 | 6.35 |
| 10 | 0.3937 | 0.5 | 12.7 |
| 12.7 | 0.5 | 0.75 | 19.05 |
| 25.4 | 1 | 1 | 25.4 |
| 50 | 1.9685 | 2 | 50.8 |
| 100 | 3.937 | 4 | 101.6 |
| 150 | 5.9055 | 6 | 152.4 |