Unit Conversion

Millimeters to Inches

1 millimeter = 0.03937 inches. Type any value below for an instant conversion.

Millimeters (mm)

Inches (in)

Enter a value to convert.

How to convert millimeters to inches

Multiply the millimeter value by 0.03937:

inches = millimeters × 0.03937

Example: 10 mm × 0.03937 = 0.393701 in. Going the other way, divide by 0.03937 (or multiply by 25.4) — or use our inches to millimeters converter.

Conversion table

Millimeters	Inches
1 mm	0.03937 in
2 mm	0.07874 in
3 mm	0.11811 in
5 mm	0.19685 in
10 mm	0.393701 in
20 mm	0.787402 in
25 mm	0.984252 in
30 mm	1.1811 in
50 mm	1.9685 in
100 mm	3.937 in
150 mm	5.9055 in
170 mm	6.6929 in
180 mm	7.0866 in
200 mm	7.874 in
500 mm	19.685 in
1,000 mm	39.3701 in

About these units

Millimeter (mm) and inch (in) are both units of length. Metric units (millimeters, centimeters, meters, kilometers) are used almost worldwide, while inches, feet, yards, and miles remain standard in the United States.

Need a different pair? Try the full unit converter.