Mils to Millimeters converter

To convert mils to millimeters, enter the value in the first field. The result in millimeters is calculated automatically using the exact conversion factor.

1 mil = 0.0254 mm
1 mm ≈ 39.3700787402 mil

Formula: mm = mil × 0.0254
mil ≈ mm × 39.3700787402

Definitions: 1 mil = 0.001 in; 1 mm = 0.001 m

The mil, also called a thou, is one thousandth of an inch. It is used in the United States for the thickness of plastic film, paper, coatings, wire and sheet material, and for machining tolerances. It is not the same as a millimeter.

The millimeter (mm) is one thousandth of a meter. It is the standard unit for small dimensions in engineering drawings, machining and manufacturing, and for measuring rainfall depth.

See the conversion table with commonly used values, handy for quick reference or study.