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Millimeters to Inches

Type a value in either box. 1 mm = 0.0393701 in.

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How to convert millimeters to inches

1 mm = 0.03937007874 in, and 1 in = 25.4 mm. To convert millimeters to inches, use:

in = mm ÷ 25.4

Example: convert 25 mm to inches: 25 ÷ 25.4 = 0.98425197, so 25 mm = 0.984252 in.

Good to know

25.4 mm is exactly one inch. Handy fractions for drill bits and wrenches: 3.2 mm ≈ 1/8 in, 6.4 mm ≈ 1/4 in, 12.7 mm = 1/2 in, 19.1 mm ≈ 3/4 in.

Millimeters to Inches chart

Millimeters (mm)Inches (in)
1 mm0.0393701 in
2 mm0.0787402 in
3 mm0.11811 in
4 mm0.15748 in
5 mm0.19685 in
6 mm0.23622 in
8 mm0.314961 in
10 mm0.393701 in
12 mm0.472441 in
15 mm0.590551 in
16 mm0.629921 in
19 mm0.748031 in
20 mm0.787402 in
25 mm0.984252 in
30 mm1.1811 in
40 mm1.5748 in
50 mm1.9685 in
60 mm2.3622 in
75 mm2.95276 in
100 mm3.93701 in
150 mm5.90551 in
200 mm7.87402 in
300 mm11.811 in

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