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MM to Inches Converter

Millimeter → Inch

1 millimeter = 0.0393701 in, and 1 inch = 25.4 mm.

0.0393701 in

Reverse: Inches to MM Converter

Formula & conversion factor
in = mm × 0.0393701
1 mm = 0.0393701 in · 1 in = 25.4 mm

Drill bits, bolts, rainfall totals and jewelry sizes are often given in millimeters while tools and plans use inches. The converter returns decimal inches.

Millimeter to Inch conversion table

mmin
0.5 mm0.019685 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
7 mm0.275591 in
8 mm0.314961 in
9 mm0.354331 in
10 mm0.393701 in
12 mm0.472441 in
15 mm0.590551 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
70 mm2.75591 in
80 mm3.14961 in
90 mm3.54331 in
100 mm3.93701 in
150 mm5.90551 in
200 mm7.87402 in
250 mm9.84252 in
300 mm11.811 in
500 mm19.685 in
1,000 mm39.3701 in

Calculated with the same formula as the converter, rounded to six significant digits.

Frequently asked questions

How many inches are in 1 millimeter?

1 millimeter equals 0.0393701 in. Formula: in = mm × 0.0393701.

What is 10 millimeters in inches?

10 mm = 0.393701 in, because 10 × 0.0393701 = 0.393701.

How many millimeters are in 1 inch?

1 inch equals 25.4 mm. To convert back, divide by 0.0393701.

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