mm to inches table
| Millimeters | Inches | Nearest 1/16 inch |
|---|---|---|
| 1 mm | 0.0394 in | 1/16 in |
| 2 mm | 0.0787 in | 1/16 in |
| 3 mm | 0.118 in | 1/8 in |
| 5 mm | 0.197 in | 3/16 in |
| 6 mm | 0.236 in | 1/4 in |
| 8 mm | 0.315 in | 5/16 in |
| 10 mm | 0.394 in | 3/8 in |
| 12 mm | 0.472 in | 1/2 in |
| 15 mm | 0.591 in | 9/16 in |
| 20 mm | 0.787 in | 13/16 in |
| 25 mm | 0.984 in | 1 in |
| 30 mm | 1.18 in | 1 3/16 in |
| 40 mm | 1.57 in | 1 9/16 in |
| 50 mm | 1.97 in | 1 15/16 in |
| 75 mm | 2.95 in | 2 15/16 in |
| 100 mm | 3.94 in | 3 15/16 in |
| 150 mm | 5.91 in | 5 7/8 in |
| 300 mm | 11.81 in | 11 13/16 in |
The formula
inches = millimeters ÷ 25.4
Worked example
50 mm ÷ 25.4 = 1.9685 in
The other way round, from inches back to millimeters: millimeters = inches × 25.4.
In your head
25 mm is very nearly an inch. Divide by 25: 50 mm → 2 in (1.97 exactly).
Questions
1 millimeter is 0.0393701 inches (0.0393700787402 exactly).
Divide millimeters by 25.4 to get inches. For example, 50 mm ÷ 25.4 = 1.9685 in.
6.35 mm. Half an inch is 12.7 mm.
Rulers, drill bits and tape measures in inches are marked in sixteenths, so the nearest 1/16 inch is what you can actually measure.