Millimeters to Inches Converter

Instantly convert between millimeters (mm) and inches (in) with precision

1 inch = 25.4 millimeters
1 millimeter = 0.03937 inches

Popular MM to Inches Conversions

1 mm
=
0.0394 in
5 mm
=
0.1969 in
10 mm
=
0.3937 in
25.4 mm
=
1 in
50 mm
=
1.9685 in
100 mm
=
3.937 in
150 mm
=
5.9055 in
200 mm
=
7.874 in
500 mm
=
19.685 in
1000 mm
=
39.3701 in

Popular Inches to MM Conversions

0.5 in
=
12.7 mm
1 in
=
25.4 mm
2 in
=
50.8 mm
3 in
=
76.2 mm
5 in
=
127 mm
6 in
=
152.4 mm
10 in
=
254 mm
12 in
=
304.8 mm
24 in
=
609.6 mm
36 in
=
914.4 mm

Millimeters to Inches Conversion Table

Millimeters (mm) Inches (in)
1 mm 0.0394 in
2 mm 0.0787 in
3 mm 0.1181 in
4 mm 0.1575 in
5 mm 0.1969 in
10 mm 0.3937 in
15 mm 0.5906 in
20 mm 0.7874 in
25 mm 0.9843 in
30 mm 1.1811 in
40 mm 1.5748 in
50 mm 1.9685 in
75 mm 2.9528 in
100 mm 3.937 in
150 mm 5.9055 in
200 mm 7.874 in
250 mm 9.8425 in
500 mm 19.685 in
1000 mm 39.3701 in

Inches to Millimeters Conversion Table

Inches (in) Millimeters (mm)
0.125 in 3.18 mm
0.25 in 6.35 mm
0.5 in 12.7 mm
0.75 in 19.05 mm
1 in 25.4 mm
1.5 in 38.1 mm
2 in 50.8 mm
3 in 76.2 mm
4 in 101.6 mm
5 in 127 mm
6 in 152.4 mm
8 in 203.2 mm
10 in 254 mm
12 in 304.8 mm
16 in 406.4 mm
20 in 508 mm
24 in 609.6 mm
30 in 762 mm
36 in 914.4 mm
48 in 1219.2 mm

How to Convert Millimeters to Inches

Converting between millimeters and inches is a common task in many fields, including manufacturing, engineering, construction, and DIY projects. Here's how to convert between these two units:

MM to Inches Formula

Inches = Millimeters ÷ 25.4

Since 1 inch equals exactly 25.4 millimeters, you simply divide the millimeter value by 25.4 to get the equivalent in inches.

Inches to MM Formula

Millimeters = Inches × 25.4

To convert from inches to millimeters, multiply the inch value by 25.4.

Example Calculations

Example 1: Convert 50 mm to inches

Inches = 50 mm ÷ 25.4 = 1.9685 inches

Example 2: Convert 3 inches to mm

Millimeters = 3 in × 25.4 = 76.2 mm

Ruler showing millimeters and inches comparison

What is a Millimeter?

A millimeter (mm) is a unit of length in the metric system, equal to one thousandth of a meter. The millimeter is commonly used for measuring small distances and object sizes in many fields, including engineering, manufacturing, and scientific research.

What is an Inch?

An inch (in) is a unit of length in the imperial and US customary systems. It is defined as exactly 25.4 millimeters. Inches are commonly used in the United States, United Kingdom, and Canada for many everyday measurements, especially in construction and interior design.