Convert Micrometers to Astronomical Units
Convert Micrometers (μm) to Astronomical Units (AU) instantly and accurately.
Conversion Formula
AU = μm × 6.684587122e-18
About Micrometers
A micrometer (μm), also called a micron, is one millionth of a meter (10⁻⁶ m). This is the scale of bacteria, small cells, and fine particles. Most bacteria range from 1-10 micrometers in length, while human red blood cells are about 6-8 micrometers in diameter. The smallest particles visible to the naked eye are around 40 micrometers. This unit is essential in biology, medicine, and precision engineering, where measurements of microscopic structures and tolerances are critical.
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
| Micrometers (μm) | Astronomical Units (AU) |
|---|---|
| 1 μm | 6.685 × 10-18 AU |
| 2 μm | 1.337 × 10-17 AU |
| 5 μm | 3.342 × 10-17 AU |
| 10 μm | 6.685 × 10-17 AU |
| 25 μm | 1.671 × 10-16 AU |
| 50 μm | 3.342 × 10-16 AU |
| 100 μm | 6.685 × 10-16 AU |