in to mm
92 unitsConvert Inch (US survey) to Millimeter (in to mm)
1 inch (US survey) = 25.4000508 millimeters. Convert inches (US survey) to millimeters instantly, with the exact factor, the formula and a reference table of common values.
in to mm conversion table
| in | mm |
|---|---|
| 1 in | 25.4000508 mm |
| 2 in | 50.8001016 mm |
| 3 in | 76.2001524 mm |
| 5 in | 127.000254 mm |
| 10 in | 254.000508 mm |
| 20 in | 508.001016 mm |
| 50 in | 1270.00254 mm |
| 100 in | 2540.00508 mm |
| 250 in | 6350.0127 mm |
| 500 in | 12700.0254 mm |
| 1000 in | 25400.0508 mm |
What is a inch (US survey)?
The inch (US survey) is a US survey unit. One inch (US survey) equals 0.0254000508 meters, so every conversion on this page starts from that single number. Survey units come from a slightly older definition of the foot that the United States kept for land measurement, so they are a tiny fraction larger than the modern versions.
The difference is far too small to notice in a room, but across miles of property boundary it matters, which is why surveyors and deed records keep the two apart.
In writing, the inch (US survey) is usually shortened to "in". One inch (US survey) is 0.0254000508 meters, and that ratio is what every figure on this page is built from.