Convert Thou to Inches
Convert Thou (th) to Inches (in) instantly and accurately.
Conversion Formula
in = th × 0.001
About Thou
A thou (also called mil) is one thousandth of an inch, equal to 0.0254 millimeters or 25.4 micrometers. This unit is commonly used in engineering and manufacturing in countries that use imperial measurements, particularly for specifying tolerances, wire gauges, and thin material thicknesses. For example, a standard plastic bag might be 1-2 thou thick, a sheet of paper is about 4 thou, and precision machined parts often have tolerances measured in thou. Electronic circuit board copper traces are typically 1.4 thou thick.
About Inches
The inch (in) is a unit of length primarily used in the United States, Canada, and the United Kingdom. Historically, an inch was defined as the width of a man's thumb, but today it's precisely defined as 2.54 centimeters. Common examples include: a quarter coin is about 1 inch in diameter, a standard smartphone is roughly 6 inches tall, and most computer screens are measured diagonally in inches. The inch is divided into fractions like 1/2, 1/4, 1/8, and 1/16 for precision measurements.
Quick Reference Table
| Thou (th) | Inches (in) |
|---|---|
| 1 th | 0.001 in |
| 2 th | 0.002 in |
| 5 th | 0.005 in |
| 10 th | 0.01 in |
| 25 th | 0.025 in |
| 50 th | 0.05 in |
| 100 th | 0.1 in |