Millimetres to Inches
1 mm = 0.0393701 in
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Field guide
About Millimetres to Inches
Type a value in millimetres and get the answer in inches straight away. 1 mm = 0.0393701 in, so inches = mm ÷ 25.4. Common in engineering, jewellery and hardware sizes.
- Type the number of millimetres.
- Read the result in inches. It updates as you type.
- Swap the units or pick another category for other conversions.
| Millimetres (mm) | Inches (in) |
|---|---|
| 1 | 0.0393701 |
| 2 | 0.0787402 |
| 3 | 0.11811 |
| 5 | 0.19685 |
| 6 | 0.23622 |
| 10 | 0.393701 |
| 12 | 0.472441 |
| 15 | 0.590551 |
| 20 | 0.787402 |
| 25 | 0.984252 |
| 50 | 1.9685 |
| 100 | 3.93701 |
Questions
Frequently asked
How do I convert millimetres to inches?
Use inches = mm ÷ 25.4. For example, 5 mm = 0.19685 in.
How many inches are in one millimetre?
1 mm = 0.0393701 in.
Is the converter accurate?
Yes. It uses the internationally defined conversion factors, rounded only for display.
Is what I type sent to a server?
No. The tool runs entirely in your browser and there's no server behind it, so what you type never leaves your device and nothing is stored. You can check: it keeps working if you go offline after the page has loaded.
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