Convert Inches to Millimeters
1 inch = 25.4 millimeters. Multiply the number of inches by 25.4.
Inches to Millimeters table
| Inches | Millimeters |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 4 in | 101.6 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 20 in | 508 mm |
| 25 in | 635 mm |
| 50 in | 1,270 mm |
| 100 in | 2,540 mm |
| 500 in | 12,700 mm |
| 1000 in | 25,400 mm |
About these units
The inch (in) is an imperial unit of length & distance, equal to 0.0254 meters.
The millimeter (mm) is a metric unit of length & distance, equal to 0.001 meters.
Going the other way, 1 millimeter = 0.039370079 inches. Length is the most converted quantity on the web. Whether you are reading a European recipe, buying timber in feet, or checking a running route in kilometres, this converter moves between every common metric, imperial and astronomical unit with full precision.
Frequently asked
- How many millimeters are in a inch?
- 1 inch = 25.4 millimeters.
- How do you convert inches to millimeters?
- Multiply the number of inches by 25.4.
- What is 10 in in mm?
- 10 in = 254 mm.