Conversion tool

MM to inches converter

To convert millimeters to inches, divide by 25.4. One millimeter equals about 0.03937 inches, so 50 mm is roughly 1.97 inches. Enter a value below for an exact result.

Live conversion

The formula

inches = millimeters ÷ 25.4

The inch is defined as exactly 25.4 mm, so this conversion is exact. To go the other way, multiply inches by 25.4.

MM to inches chart

MillimetersInches (exact)Inches (rounded)
1 mm0.0394 in0.04 in
2 mm0.0787 in0.08 in
3 mm0.1181 in0.12 in
5 mm0.1969 in0.20 in
10 mm0.3937 in0.39 in
15 mm0.5906 in0.59 in
20 mm0.7874 in0.79 in
25 mm0.9843 in0.98 in
50 mm1.9685 in1.97 in
100 mm3.9370 in3.94 in
300 mm11.8110 in11.81 in

MM to inches FAQ

How do you convert mm to inches?+

Divide the millimeter value by 25.4, because one inch equals exactly 25.4 millimeters. For example, 50 mm ÷ 25.4 = 1.97 inches.

How many inches is 1 mm?+

One millimeter equals about 0.03937 inches, roughly one twenty-fifth of an inch.

How many inches is 10 mm?+

10 mm equals about 0.3937 inches, which is the same as 1 centimeter.

What is 25.4 mm in inches?+

25.4 mm equals exactly 1 inch, because the inch is defined as 25.4 millimeters.

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