mm to inches
Type millimetres to get inches, as a decimal and as the nearest fraction, or inches to get millimetres.
Nearest 1/32 inch
| mm | inches | nearest 1/16 |
|---|---|---|
| 1 mm | 0.0394 in | 1/16 in |
| 2 mm | 0.0787 in | 1/16 in |
| 3 mm | 0.1181 in | 2/16 in |
| 5 mm | 0.1969 in | 3/16 in |
| 6 mm | 0.2362 in | 4/16 in |
| 8 mm | 0.3150 in | 5/16 in |
| 10 mm | 0.3937 in | 6/16 in |
| 12 mm | 0.4724 in | 8/16 in |
| 13 mm | 0.5118 in | 8/16 in |
| 16 mm | 0.6299 in | 10/16 in |
| 19 mm | 0.7480 in | 12/16 in |
| 20 mm | 0.7874 in | 13/16 in |
| 25 mm | 0.9843 in | 16/16 in |
| 50 mm | 1.9685 in | 31/16 in |
| 100 mm | 3.9370 in | 63/16 in |
How it works
inches = mm ÷ 25.4mm = inches × 25.4Worked example
- 25 mm ÷ 25.4
- = 0.9843 in
- about 63/64, nearly 1 inch
Frequently asked questions
How many millimetres are in an inch?
Exactly 25.4 mm.
Why show fractions?
Tape measures, drill bits and wrenches in the US are marked in fractions of an inch (1/8, 1/16, 1/32), so 6 mm is easier to find as roughly 1/4 inch.