Convert Inches to Millimeters
Enter the value in inches to get its exact equivalent in millimeters instantly.
How to convert inches to millimeters?
To transform a measurement from inches (in) to millimeters (mm), multiply the value by the exact conversion factor of 25.4. The formula is:
mm = in × 25.4
The international inch was standardized in 1959 as exactly 25.4 millimeters. This unit is essential in industrial sectors, tool sizing, and electronic components.
| Inches (in) | Millimeters (mm) |
|---|---|
| 1.00 | 25.40 |
| 5.00 | 127.00 |
| 10.00 | 254.00 |
| 50.00 | 1,270.00 |
| 100.00 | 2,540.00 |
Related Conversions
Frequently Asked Questions
How many millimeters are in 1 inch?
There are exactly 25.4 millimeters in one international inch.
How much is 1/2 inch in mm?
It is 12.7 millimeters, calculated by multiplying 0.5 by 25.4.