Convert Inches to Millimeters (in to mm)
1 inch = 25.4 millimeters
How to convert inches to millimeters
millimeters = inches × 25.4Example: 10 in = 254 mm. To go the other way, see millimeters to inches.
Inches to Millimeters conversion table
| Inches (in) | Millimeters (mm) |
|---|---|
| 0.5 | 12.7 |
| 1 | 25.4 |
| 2 | 50.8 |
| 3 | 76.2 |
| 4 | 101.6 |
| 5 | 127 |
| 6 | 152.4 |
| 7 | 177.8 |
| 8 | 203.2 |
| 9 | 228.6 |
| 10 | 254 |
| 15 | 381 |
| 20 | 508 |
| 25 | 635 |
| 30 | 762 |
| 40 | 1,016 |
| 50 | 1,270 |
| 75 | 1,905 |
| 100 | 2,540 |
| 250 | 6,350 |
| 500 | 12,700 |
| 1,000 | 25,400 |
Frequently Asked Questions
How many millimeters are in a inch?
There are 25.4 millimeters in one inch.
How do I convert in to mm?
Use the formula millimeters = inches × 25.4. For example, 10 in equals 254 mm.