Convert Millimeter to Inch

Enter a value in Millimeter to see it instantly in Inch, or use the reverse converter below.

1 mm = 0.0393700787 in

See this the other way: Inch to Millimeter

Millimeter

Definition: One thousandth of a meter, the SI base unit of length.

Current use: Used for small, precise measurements in engineering, printing, and manufacturing tolerances.

Inch

Definition: A US customary and imperial unit equal to exactly 25.4 millimeters, with 12 inches to a foot.

Current use: Used in the US for screen sizes, paper, tools, and rainfall, and in the UK for height.

Millimeter to Inch Conversion Table

mm to in
Millimeter [mm]	Inch [in]
0.01 mm	0.0003937008 in
0.1 mm	0.0039370079 in
1 mm	0.0393700787 in
2 mm	0.0787401575 in
3 mm	0.1181102362 in
5 mm	0.1968503937 in
10 mm	0.3937007874 in
20 mm	0.7874015748 in
50 mm	1.968503937 in
100 mm	3.937007874 in
1000 mm	39.3700787402 in

How to Convert Millimeter to Inch

1 mm = 0.0393700787 in
1 in = 25.4 mm

Example: convert 1 mm to in:

1 mm = 0.0393700787 in

Inch to Millimeter Conversion Table

in to mm
Inch [in]	Millimeter [mm]
0.01 in	0.254 mm
0.1 in	2.54 mm
1 in	25.4 mm
2 in	50.8 mm
3 in	76.2 mm
5 in	127 mm
10 in	254 mm
20 in	508 mm
50 in	1270 mm
100 in	2540 mm
1000 in	25400 mm

Quick Estimate

For a quick mental estimate, 1 mm is about 0.039 in, and 1 in is about 25 mm. Use the exact calculator above when accuracy matters, such as for money, medicine, engineering or anything you will buy or sell.

Frequently Asked Questions

How many Inch are in 1 Millimeter?

1 Millimeter (mm) equals 0.0393700787 Inch (in).

How do I convert Millimeter to Inch?

Multiply the value in mm by 0.0393700787 to get in. To go the other way, multiply in by 25.4.

What is 10 Millimeter in Inch?

10 mm = 0.3937007874 in.

What is 100 Millimeter in Inch?

100 mm = 3.937007874 in.

What is a Millimeter?

One thousandth of a meter, the SI base unit of length. Used for small, precise measurements in engineering, printing, and manufacturing tolerances.

What is a Inch?

A US customary and imperial unit equal to exactly 25.4 millimeters, with 12 inches to a foot. Used in the US for screen sizes, paper, tools, and rainfall, and in the UK for height.