Convert Inch to Millimeter

25.4

β‰ˆ 25 13/32 mm

Use the conversion factor 1 in = 25.4 mm. To convert Inch to Millimeter, multiply the input value by 25.4.

Conversion Formula

mm = in Γ— 25.4

Reverse: in = mm Γ— 0.0393701

Conversion Examples

1 in Γ— 25.4 =
25.4 mm
1 Inches = 25.4 Millimeters
5 in Γ— 25.4 =
127 mm
5 Inches = 127 Millimeters
10 in Γ— 25.4 =
254 mm
10 Inches = 254 Millimeters
25 in Γ— 25.4 =
635 mm
25 Inches = 635 Millimeters
50 in Γ— 25.4 =
1,270 mm
50 Inches = 1,270 Millimeters
100 in Γ— 25.4 =
2,540 mm
100 Inches = 2,540 Millimeters

Inch to Millimeter Table

in =β€”mm
Inch (in)Millimeter (mm)
125.4
250.8
376.2
4101.6
5127
6152.4
7177.8
8203.2
9228.6
10254
11279.4
12304.8
13330.2
14355.6
15381
16406.4
17431.8
18457.2
19482.6
20508

Unit Definitions

What is a Inch (in)?

ImperialUnited States, United Kingdom, Canada

Inch (in) is one of the two units used in this conversion. Open its dedicated unit page for the reviewed definition and references.

Learn more about Inch

What is a Millimeter (mm)?

Metric (SI)Worldwide

Millimeter (mm) is one of the two units used in this conversion. Open its dedicated unit page for the reviewed definition and references.

Learn more about Millimeter

Frequently Asked Questions

How do I convert Inch to Millimeter?
Multiply the value in in by 25.4. The formula is mm = in Γ— 25.4.
How many Millimeter are in 1 Inch?
One Inch equals 25.4 mm.
What is 5 in in mm?
5 in equals 127 mm.
How do I convert Millimeter back to Inch?
Use the reverse factor: 1 mm = 0.03937007874 in.

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