Inches to MM Converter
QuickSizeConvert Converter
Length & weight — updates as you type
Use the converter above to convert inches to mm instantly.
Formula
1 inch = 25.4 millimeters. Formula: inches x 25.4.
Common conversions
| From | Equals |
|---|---|
| 1 inch | 25.4 mm |
| 5 inches | 127 mm |
| 10 inches | 254 mm |
How to convert
Enter a value in the converter, or use the formula above. For everyday use, round the result to two decimal places.
Frequently Asked Questions
What is the formula for inches to mm?
1 inch = 25.4 millimeters. Formula: inches x 25.4.