File & Data Converters
Inches to MM Converter
Enter a value in inches to convert it to millimeters, or switch units to convert the other way.
1 Inches = 25.4 Millimeters
All Inches conversions
Millimeters
25.4
Centimeters
2.54
Meters
0.0254
Kilometers
0.000025
Feet
0.083333
Yards
0.027778
Miles
0.000016
How to use this tool
- 1Enter a value in inches.
- 2The result in millimeters updates instantly.
- 3Use the swap button to convert millimeters to inches instead.
Frequently asked questions
How many mm is 1 inch?+
1 inch equals exactly 25.4 millimeters.