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

Millimeters Inches (exact) Inches (rounded)
1 mm 0.0394 in 0.04 in
2 mm 0.0787 in 0.08 in
3 mm 0.1181 in 0.12 in
5 mm 0.1969 in 0.20 in
10 mm 0.3937 in 0.39 in
15 mm 0.5906 in 0.59 in
20 mm 0.7874 in 0.79 in
25 mm 0.9843 in 0.98 in
50 mm 1.9685 in 1.97 in
100 mm 3.9370 in 3.94 in
300 mm 11.8110 in 11.81 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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