How to use this tool
- Pick the kind of measurement: length, weight, temperature and so on.
- Type a value and choose the unit you are converting from and to.
- The answer appears at once, and the table lists the value in every other unit.
MM to inches chart
| mm | inches | Nearest fraction |
|---|---|---|
| 3 | 0.118 | 1/8 (0.125) |
| 6 | 0.236 | 1/4 (0.25) |
| 10 | 0.394 | 3/8 (0.375) |
| 13 | 0.512 | 1/2 (0.5) |
| 19 | 0.748 | 3/4 (0.75) |
| 25.4 | 1.000 | 1 |
Frequently asked questions
How many mm is an inch?
Exactly 25.4 mm.
Is 10 mm bigger than 3/8 inch?
Slightly. 10 mm is 0.394 in and 3/8 in is 0.375 in.
How do I convert inches to mm?
Multiply by 25.4.
Need more detail? See the full Unit Converter guide.
Sources and references
- NIST Handbook 44 Appendix C: General tables of units of measurement
- BIPM: The International System of Units (SI Brochure)