Convert Inches to Millimeters
Fast and precise scientific conversions
6 digits
25.4
Result Summary
1 Inch = 25.4 Millimeter
About this conversion
One inch equals exactly 25.4 millimetres. This precise conversion is frequently used in engineering, 3D printing, and precision manufacturing.
Formula
Multiply the length in inches by 25.4
Inch to Millimeter Conversion Table
| Inch (in) | Millimeter (mm) |
|---|---|
| 1 | 25.4 |
| 5 | 127 |
| 10 | 254 |
| 25 | 635 |
| 50 | 1,270 |
| 100 | 2,540 |
| 500 | 12,700 |
| 1,000 | 25,400 |
Looking for the reverse?
Convert Millimeters to Inches