Home / Length Conversion / Convert inch (US survey) [in] to millimeter [mm]
Convert inch (US survey) [in] to millimeter [mm]
Please provide values below to Convert inch (US survey) [in] to millimeter [mm], or vice versa.
What is a US Survey Inch?
The US survey inch (1/39.37 meter ≈ 2.540005 cm) was slightly longer than the international inch (2.54 cm). Used in all American engineering drawings until 2023, its difference caused measurable discrepancies in large-scale projects.
What is a Millimeter (mm)?
The millimeter (mm) equals one-thousandth of a meter. It is commonly used for precision measurements in engineering, manufacturing, and construction.
inch (US survey) [in] to millimeter [mm] Conversion Table
| inch (US survey) [in] | millimeter [mm] |
|---|---|
| 0.01 inch (US survey) [in] | 0.254000508001 millimeter [mm] |
| 0.1 inch (US survey) [in] | 2.54000508001 millimeter [mm] |
| 1 inch (US survey) [in] | 25.4000508001 millimeter [mm] |
| 2 inch (US survey) [in] | 50.8001016002 millimeter [mm] |
| 3 inch (US survey) [in] | 76.2001524003 millimeter [mm] |
| 5 inch (US survey) [in] | 127.000254001 millimeter [mm] |
| 10 inch (US survey) [in] | 254.000508001 millimeter [mm] |
| 20 inch (US survey) [in] | 508.001016002 millimeter [mm] |
| 50 inch (US survey) [in] | 1270.00254001 millimeter [mm] |
| 100 inch (US survey) [in] | 2540.00508001 millimeter [mm] |
| 1000 inch (US survey) [in] | 25400.0508001 millimeter [mm] |
How to Convert inch (US survey) [in] to millimeter [mm]
1 inch (US survey) [in] = 25.400050800102 millimeter [mm]
1 millimeter [mm] = 0.039369999999999 inch (US survey) [in]
Example: convert 15 inch (US survey) [in] to millimeter [mm]:
15 × 25.400050800102 = 381.00076200153 millimeter [mm]