inches to millimeters
Convert inch to millimeter — instant, free, with the formula shown.
1 in=25.4 mm
How to convert inch to millimeter
To convert inch to millimeter, multiply by 25.4:
mm = in × 25.4
For example, 10 in × 25.4 = 254 mm.
in to mm conversion table
| inches (in) | millimeters (mm) |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 25 in | 635 mm |
| 50 in | 1270 mm |
| 100 in | 2540 mm |
| 250 in | 6350 mm |
| 500 in | 12700 mm |
| 1000 in | 25400 mm |
Other inch conversions
Convert to millimeter from another unit
in to mm — frequently asked
How many millimeters are in 1 inch?
1 inch = 25.4 millimeters (in × 25.4 = mm).
What is the formula to convert inch to millimeter?
Multiply your inch value by 25.4 to get millimeter.
How do I convert 10 inches to millimeters?
10 in = 254 mm. For 100 in the answer is 2540 mm. Use the calculator on this page for any other value.