Convert inch to millimeter
Please provide values below to convert inch [in] to millimeter [mm], or Convert millimeter to inch.
1 in = 25.4 mm. To convert inch to millimeter, multiply the value by 25.4; to go the other way, divide by it (1 mm = 0.0393700787402 in). Both units measure length and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Quick Reference
- 1 in = 25.4 mm
- 1 mm = 0.0393700787402 in
- 10 in = 254 mm
- 100 in = 2540 mm
How to Convert Inch to Millimeter
1 in = 25.4 mm
Example: convert 15 in to mm:
15 in = 15 × 25.4 mm = 381 mm
Inch to Millimeter Conversion Table
| inch | millimeter |
|---|---|
| 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 |
| 500 in | 12700 mm |
| 1000 in | 25400 mm |
Inch
An inch is a unit of length in the imperial and US customary systems of measurement. An inch was defined to be equivalent to exactly 25.4 millimeters in 1959. There are 12 inches in a foot and 36 inches in a yard.
History/Origin
The term "inch" was derived from the Latin unit "uncia" which was equivalent to "one-twelfth" of a Roman foot. The inch has had various standards throughout history, with the current definition being based on the international yard.
Current Use
The inch is mostly used in the United States, Canada, and the United Kingdom. It is also sometimes used in Japan (as well as other countries) in relation to electronic parts, like the size of display screens.
Millimeter
A millimeter is a unit of length in the metric system, equal to one-thousandth of a meter.
History/Origin
The prefix "milli-" comes from the Latin word "mille," meaning thousand. The millimeter was part of the original metric system adopted in France in 1795.
Current Use
The millimeter is widely used in engineering and manufacturing for high-precision measurements. It is also a common unit in construction and for measuring small objects.
Frequently Asked Questions
What is 1 inch in millimeter?
1 inch (in) = 25.4 millimeter (mm).
How do you convert inch to millimeter?
Multiply the inch value by 25.4. For example, 25 in × 25.4 = 635 mm.
What is 10 inch in millimeter?
10 in = 254 mm.
Which unit is larger, the inch or the millimeter?
The inch is the larger unit: 1 in = 25.4 mm.