📐 Millimeters to Inches Converter

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1 millimeter =
0.0393701 inches
1 inch =
25.4 millimeters
Formula
in = mm × 0.0393701
Handy values
5 mm = 0.19685 in · 10 mm = 0.393701 in · 100 mm = 3.93701 in

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⚡ Millimeters to Inches: the quick answer

1 mm = 0.0393701 in 1 millimeter equals 0.0393701 inches

To convert millimeters to inches, multiply the value by 0.0393701. To go the other way, multiply inches by 25.4 to get millimeters.

↔ Convert inches to millimeters instead

🧮 Formula

Millimeters to Inches
in = mm × 0.0393701
Inches to Millimeters
mm = in × 25.4

Where

  • mm = the length in millimeters
  • in = the length in inches
Every unit here is defined by its length in meters, so the conversion factor is (meters per millimeter) ÷ (meters per inch).

📊 Millimeters to Inches conversion table

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
7 mm0.275591 in
8 mm0.314961 in
9 mm0.354331 in
10 mm0.393701 in
12 mm0.472441 in
14 mm0.551181 in
15 mm0.590551 in
20 mm0.787402 in
21 mm0.826772 in
24 mm0.944882 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
80 mm3.14961 in
100 mm3.93701 in
200 mm7.87402 in
250 mm9.84252 in
300 mm11.811 in
400 mm15.748 in
500 mm19.685 in
750 mm29.5276 in
1,000 mm39.3701 in

📘 About these units

Millimeter (mm). A millimeter is one thousandth of a meter, used for small measurements such as thickness and rainfall.

Inch (in). The inch is an imperial and US customary unit equal to exactly 25.4 millimeters, used for screen sizes, pipes and tyres.

❓ Frequently asked questions

How many inches are in one millimeter?

There are 0.0393701 inches in one millimeter.

How do I convert millimeters to inches?

Multiply the number of millimeters by 0.0393701. For example, 10 millimeters equal 0.393701 inches.

How many millimeters are in one inch?

One inch equals 25.4 millimeters.

How many inches is 12 millimeters?

0.472441 inches. Other common values: 5 millimeters = 0.19685 inches and 100 millimeters = 3.93701 inches.

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