Inches to Millimetres Converter
Convert inches to millimetres instantly. 1 inch = 25.4 millimetres.
Inches to Millimetres conversion table
| in | mm |
|---|---|
| 1 | 25.4 |
| 2 | 50.8 |
| 5 | 127 |
| 10 | 254 |
| 20 | 508 |
| 50 | 1,270 |
| 100 | 2,540 |
| 500 | 12,700 |
| 1,000 | 25,400 |
How to use the inches to millimetres
- Enter the value in inches.
- Use the swap button to convert the other way.
- Read the result in millimetres right away.
Frequently asked questions
How many millimetres are in 1 inch?
1 inch (in) equals 25.4 millimetres (mm).
How do I convert inches to millimetres?
Multiply the value in in by 25.4. For example, 10 in × 25.4 = 254 mm.
How do I convert millimetres back to inches?
Multiply the value in mm by 0.03937008, or divide it by 25.4.