Inches to Millimetres
1 in = 25.4 mm1 in = 25.4 mm
Convert inches (in) to millimetres (mm) instantly and for free. Enter any value in the full unit converter for a live result, or use the reference table below. Everything runs in your browser — nothing is uploaded.
Inches to millimetres table
| Inches (in) | Millimetres (mm) |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 25 in | 635 mm |
| 50 in | 1270 mm |
| 100 in | 2540 mm |
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Frequently asked questions
How do you convert inches to millimetres?
Multiply the number of inches by 25.4 to get millimetres. For example, 1 inch = 25.4 mm.
Is this inches to millimetres converter free?
Yes. It's completely free, needs no sign-up, and runs entirely in your browser.