Convert Inch (in) to Millimeter (mm)
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What is Inch (in)?
An inch (symbol: in) is a unit of length in the British imperial and the United States customary systems of measurement. It is equal to exactly 25.4 mm.
History
The inch is derived from the Roman uncia ('twelfth'), representing one-twelfth of a foot. Various standards existed until the international yard and pound agreement of 1959 standardized it.
Current Use
Widely used in the United States, UK, and Canada for defining screen sizes, pipe diameters, and everyday measurements.
Inch (in) to Millimeter (mm) Conversion Table
| Inch (in) | Millimeter (mm) |
|---|---|
| 0.01 in | 0.254 millimeter |
| 0.1 in | 2.54 millimeter |
| 1 in | 25.4 millimeter |
| 2 in | 50.8 millimeter |
| 3 in | 76.2 millimeter |
| 4 in | 101.6 millimeter |
| 5 in | 127 millimeter |
| 10 in | 254 millimeter |
| 20 in | 508 millimeter |
| 50 in | 1270 millimeter |
| 100 in | 2540 millimeter |
| 1000 in | 25,400 millimeter |
Common length Conversions
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