IN to MM - Inch to Millimeter Converter

Understanding Inches and Millimeters

Inches (in) and millimeters (mm) are units of length used in different measurement systems:

Inches are part of the Imperial and US customary systems
Millimeters are part of the Metric system
1 inch = 25.4 millimeters (exactly)

Conversion Table

Inches	Millimeters
1/8	3.175
1/4	6.35
1/2	12.7
1	25.4
2	50.8

How to Convert

Inches to Millimeters

To convert inches to millimeters, multiply the inch value by 25.4

Example: 2 inches = 2 × 25.4 = 50.8 millimeters

Millimeters to Inches

To convert millimeters to inches, divide the millimeter value by 25.4

Example: 76.2 millimeters = 76.2 ÷ 25.4 = 3 inches