📏 Length
Inches to Millimeters
in → mm converter with instant results
Convert Inches to Millimeters
Formula
in × 25.4 = mm
Conversion Table
| Inches (in) | Millimeters (mm) |
|---|---|
| 0.01 in | 0.254 mm |
| 0.1 in | 2.54 mm |
| 0.25 in | 6.35 mm |
| 0.5 in | 12.7 mm |
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 5 in | 127.00 mm |
| 10 in | 254.00 mm |
| 25 in | 635.00 mm |
| 50 in | 1270.00 mm |
| 100.00 in | 2540.00 mm |
| 250.00 in | 6350.00 mm |
| 500.00 in | 12700.00 mm |
| 1000.00 in | 25400.00 mm |
How to Convert Inches to Millimeters
To convert inches to millimeters: Multiply by 25.4.
The conversion factor is: 1 in = 25.4 mm. Conversely, 1 mm = 0.03937 in.
About Inches
Inches is one of the units people run into when comparing length values across international travel and construction drawings. On this page, it serves as the starting unit so you can translate that value directly into Millimeters without switching tools or estimating by hand.