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Length converter

Millimeters to Inches (mm to in)

Type in either box: it converts both ways, accepts sums like 12*3, and shows every other length unit too.

1 mm = 0.03937007874 in. To convert millimeters to inches, divide the value in millimeters by 25.4.

How to convert millimeters to inches

To convert millimeters (mm) to inches (in), divide the value in millimeters by 25.4.

in = mm ÷ 25.4

Example: 10 mm = 0.3937007874 in.

You can also type 10 mm to in into the smart calculator, or mix units: 1 mm + 1 in.

Millimeters to Inches conversion table

Millimeters to Inches
MillimetersInches
0.01 mm0.00039370079 in
0.1 mm0.0039370079 in
0.25 mm0.0098425197 in
0.5 mm0.019685039 in
1 mm0.039370079 in
2 mm0.078740157 in
3 mm0.11811024 in
4 mm0.15748031 in
5 mm0.19685039 in
6 mm0.23622047 in
7 mm0.27559055 in
8 mm0.31496063 in
9 mm0.35433071 in
10 mm0.39370079 in
12 mm0.47244094 in
15 mm0.59055118 in
20 mm0.78740157 in
25 mm0.98425197 in
30 mm1.1811024 in
40 mm1.5748031 in
50 mm1.9685039 in
60 mm2.3622047 in
75 mm2.9527559 in
100 mm3.9370079 in
250 mm9.8425197 in
500 mm19.685039 in
1,000 mm39.370079 in

Converting inches back to millimeters

1 in = 25.4 mm. See the Inches to Millimeters converter, or press the swap button above.

About the units

Millimeter (mm)

One thousandth of a meter. Ten millimeters make a centimeter.

Inch (in)

Exactly 2.54 centimeters. Twelve inches make a foot.

Length measures distance in one dimension. The SI base unit is the meter, defined by the distance light travels in a vacuum in 1/299,792,458 of a second. Since the 1959 international yard and pound agreement, imperial and US customary lengths are defined exactly in meters: an inch is exactly 2.54 centimeters.

Questions and answers

How many inches are in a millimeter?

One millimeter (mm) equals 0.03937007874 inches (in).

How do I convert millimeters to inches?

To convert millimeters to inches, divide the value in millimeters by 25.4. The formula is in = mm ÷ 25.4. For example, 10 mm = 0.39370079 in.

What is 10 mm in in?

10 millimeters is 0.3937007874 inches.

Which is bigger, a millimeter or a inch?

A inch is bigger: 1 in = 25.4 mm.

How many centimeters are in a foot?

A foot is exactly 30.48 centimeters, because an inch is defined as exactly 2.54 cm and a foot is 12 inches.

Does this mm to in converter work offline?

Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.