International Size Conversion

Millimeter / Inch Conversion Chart

  1. To convert millimeters to inches, multiply the mm dimension by 0.03937.
  2. To convert inches to millimeters, multiply the inch dimension (in decimal form) by 25.4.
  3. If your number is a fraction, divide the numerator by the denominator to reach the decimal form.
International Size Conversion
mm inch
2 0.0787"
3 0.1181"
4 0.1575"
5 0.1968"
6 0.2362"
7 0.2756"
8 0.3150"
9 0.3543"
10 0.3973"
11 0.4331"
12 0.4724"