Convert inches to millimeters

Please provide values below to convert inches to millimeters [mm], or vice versa.

inches
mm

How to convert inches to millimeters?

The formula to convert inches to millimeters is: 1 inch = 25.4 millimeters

Therefore, to convert inches to millimeters, you can multiply the number of inches by 25.4.

Here are 3 examples:

  • 1 inch = 1 x 25.4 = 25.4 millimeters
  • 5 inches = 5 x 25.4 = 127 millimeters
  • 10 inches = 10 x 25.4 = 254 millimeters

 

What is an inch?

An inch is a unit of length in the imperial system, equal to 1/12 of a foot or 1/36 of a yard. It is commonly used in the United States, the United Kingdom, and other countries that have not adopted the metric system.

To convert an inch to other units of length:

  • 1 inch = 2.54 centimeters (cm)
  • 1 inch = 0.0254 meters (m)
  • 1 inch = 0.0000254 kilometers (km)
  • 1 inch = 1000 mils (a mil is a unit of length equal to 1/1000 of an inch)
  • 1 inch = 0.0833 feet (ft)

 

What is a millimeter?

A millimeter is a unit of length in the metric system, equal to one-thousandth of a meter. It is commonly used in science, engineering, and everyday applications.

To convert a millimeter to other units of length:

  • 1 millimeter = 0.1 centimeters (cm)
  • 1 millimeter = 0.001 meters (m)
  • 1 millimeter = 0.000001 kilometers (km)
  • 1 millimeter = 0.03937 inches (in)
  • 1 millimeter = 0.0033 feet (ft)

 

How many millimeters in an inch?

There are 25.4 millimeters in an inch.

 

How to convert 10 inches to millimeters?

To convert 10 inches to millimeters, you can multiply 10 by 25.4

10 inches = 10 x 25.4 = 254 millimeters

So, 10 inches is equal to 254 millimeters.

 

Inches to millimeters conversion table

Below is a table converting inches to millimeters for the common ranges. The conversion factor used is 1 inch = 25.4 millimeters, and values are rounded to two decimal places for clarity.
Inches
Millimeters
1.0
25.40
1.5
38.10
2.0
50.80
2.5
63.50
3.0
76.20
3.5
88.90
4.0
101.60
4.5
114.30
5.0
127.00
5.5
139.70
6.0
152.40
6.5
165.10
7.0
177.80
7.5
190.50
8.0
203.20
8.5
215.90
9.0
228.60
9.5
241.30
10.0
254.00
10.5
266.70
11.0
279.40
11.5
292.10
12.0
304.80
12.5
317.50
13.0
330.20
13.5
342.90
14.0
355.60
14.5
368.30
15.0
381.00
15.5
393.70
16.0
406.40
16.5
419.10
17.0
431.80
17.5
444.50
18.0
457.20
18.5
469.90
19.0
482.60
19.5
495.30
20.0
508.00
30.0
762.00
40.0
1016.00
50.0
1270.00
60.0
1524.00
70.0
1778.00
80.0
2032.00
90.0
2286.00
100.0
2540.00

Inch fractions to millimeters table

This table includes the requested conversions and additional common fractional inch values used in engineering, woodworking, and other technical fields.

Inches (Fraction)
Inches (Decimal)
Millimeters
1/32
0.03125
0.79
1/16
0.0625
1.59
3/32
0.09375
2.38
1/8
0.125
3.18
5/32
0.15625
3.97
3/16
0.1875
4.76
7/32
0.21875
5.56
1/4
0.25
6.35
9/32
0.28125
7.14
5/16
0.3125
7.94
11/32
0.34375
8.73
3/8
0.375
9.53
13/32
0.40625
10.32
7/16
0.4375
11.11
15/32
0.46875
11.91
1/2
0.5
12.70
9/16
0.5625
14.29
5/8
0.625
15.88
11/16
0.6875
17.46
3/4
0.75
19.05
13/16
0.8125
20.64
7/8
0.875
22.23
15/16
0.9375
23.81
1
1.0
25.40

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Inches to Feet

MM to Inches