MM to Inches Converter
Convert millimeters to inches instantly.
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Convert millimeters to inches
Enter a value in either box above to convert between millimeters and inches instantly. One inch is exactly 25.4 millimeters, so to go from millimeters to inches you divide by 25.4. This conversion is common in engineering, DIY and product dimensions, where small parts are measured in millimeters. It runs entirely in your browser.
Quick reference
1 mm = 0.0393701 in, 25.4 mm = 1 in, and 10 mm = 0.393701 in.
Frequently asked questions
How many inches is a millimeter?
One millimeter equals about 0.0393701 inches. To convert, divide the number of millimeters by 25.4.
What is the formula?
Inches equal millimeters divided by 25.4, because one inch is exactly 25.4 millimeters.