Convert Millimeter (mm) to Inch (in)

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What is Inch (in)?

An inch (symbol: in) is a unit of length in the British imperial and the United States customary systems of measurement. It is equal to exactly 25.4 mm.

History

The inch is derived from the Roman uncia ('twelfth'), representing one-twelfth of a foot. Various standards existed until the international yard and pound agreement of 1959 standardized it.

Current Use

Widely used in the United States, UK, and Canada for defining screen sizes, pipe diameters, and everyday measurements.

Millimeter (mm) to Inch (in) Conversion Table

Millimeter (mm)Inch (in)
0.01 millimeter0.000394 in
0.1 millimeter0.003937 in
1 millimeter0.03937 in
2 millimeter0.07874 in
3 millimeter0.11811 in
4 millimeter0.15748 in
5 millimeter0.19685 in
10 millimeter0.393701 in
20 millimeter0.787402 in
50 millimeter1.968504 in
100 millimeter3.937008 in
1000 millimeter39.370079 in