Convert Inch to Millimeter
25.4
β 25 13/32 mm
1 in = 25.4 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 =βmm
| Inch (in) | Millimeter (mm) | Fraction |
|---|---|---|
| 1 | 25.4 | 25 13/32 |
| 2 | 50.8 | 50 51/64 |
| 3 | 76.2 | 76 13/64 |
| 4 | 101.6 | 101 19/32 |
| 5 | 127 | β |
| 6 | 152.4 | 152 13/32 |
| 7 | 177.8 | 177 51/64 |
| 8 | 203.2 | 203 13/64 |
| 9 | 228.6 | 228 19/32 |
| 10 | 254 | β |
| 11 | 279.4 | 279 13/32 |
| 12 | 304.8 | 304 51/64 |
| 13 | 330.2 | 330 13/64 |
| 14 | 355.6 | 355 19/32 |
| 15 | 381 | β |
| 16 | 406.4 | 406 13/32 |
| 17 | 431.8 | 431 51/64 |
| 18 | 457.2 | 457 13/64 |
| 19 | 482.6 | 482 19/32 |
| 20 | 508 | β |
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 InchWhat 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 MillimeterFrequently 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.