Inches to Millimeters Converter

Convert inches to millimeters quickly and accurately with our free online tool

Conversion Formula

1 inch = 25.4 millimeters

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

mm = in × 25.4

Inches to Millimeters Conversion Table

Inches (in) Millimeters (mm)
1/16"1.5875 mm
1/8"3.175 mm
1/4"6.35 mm
1/2"12.7 mm
1"25.4 mm
2"50.8 mm
3"76.2 mm
4"101.6 mm
5"127.0 mm
6"152.4 mm
7"177.8 mm
8"203.2 mm
9"228.6 mm
10"254.0 mm
12"304.8 mm
24"609.6 mm
36"914.4 mm

About Inches to Millimeters Conversion

The inch is a unit of length commonly used in the United States and United Kingdom, while the millimeter is part of the metric system used worldwide. Converting between these units is essential for engineering, manufacturing, and many DIY projects.

How to Convert Inches to Millimeters

To convert inches to millimeters:

  1. Take your measurement in inches
  2. Multiply the inch value by 25.4 (the conversion factor)
  3. The result is the equivalent measurement in millimeters

Example: Convert 5 inches to millimeters

5 in × 25.4 = 127 mm

Common Conversions

Here are some frequently used inch to millimeter conversions:

Applications of Inch to Millimeter Conversion

This conversion is particularly important in: