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Millimeter Inch Converter

Enter a value in one of the fields to convert millimeters to inches:

Formula

To calculate the length in inches you divide the length in millimeters by 25.4:

About the Units

Millimeter

The millimeter is an international unit for measuring very small lengths. It equals 0.001 meters and 0.1 centimeters.

Inch

The inch is a unit of length for measuring small distances, primarily used in the USA. It equals 1/12 of a foot and 2.54 centimeters.

Important Distances

  Millimeters Inches
Marathon 42,195,000.0 1,661,220.5
Race track "Mille Miglia" 1,609,300,000.0 63,358,267.7
Earth radius 6,378,165,000.0 251,108,858.3
Earth circumference 40,075,192,000.0 1,577,763,464.6
Distance earth ↔ moon 384,400,000,000.0 15,133,858,267.7
Distance earth ↔ sun 149,593,780,000,000.0 5,889,518,897,637.8