Convert Thou to Astronomical Units
Convert Thou (th) to Astronomical Units (AU) instantly and accurately.
Conversion Formula
AU = th × 1.697885129e-16
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 Astronomical Units
An astronomical unit (AU) is the average distance between Earth and the Sun, precisely defined as 149,597,870.7 kilometers. This unit provides a convenient scale for measuring distances within our solar system. Mars orbits at 1.5 AU, Jupiter at 5.2 AU, and Neptune at about 30 AU from the Sun. The dwarf planet Pluto reaches up to 49 AU away. Light takes about 8.3 minutes to travel 1 AU, explaining why we see the Sun as it was 8 minutes ago. The AU is fundamental in astronomy and space exploration.
Quick Reference Table
| Thou (th) | Astronomical Units (AU) |
|---|---|
| 1 th | 1.698 × 10-16 AU |
| 2 th | 3.396 × 10-16 AU |
| 5 th | 8.489 × 10-16 AU |
| 10 th | 1.698 × 10-15 AU |
| 25 th | 4.245 × 10-15 AU |
| 50 th | 8.489 × 10-15 AU |
| 100 th | 1.698 × 10-14 AU |