Convert Millimeters to Astronomical Units
Convert Millimeters (mm) to Astronomical Units (AU) instantly and accurately.
Conversion Formula
AU = mm × 6.684587122e-15
About Millimeters
A millimeter (mm) is one thousandth of a meter, making it the smallest unit commonly used in everyday measurements. To visualize this, a credit card is about 1 mm thick, and a paperclip wire is roughly 1 mm in diameter. Millimeters are essential in engineering, manufacturing, and medicine for precise measurements. Rainfall is measured in millimeters, with 1 mm representing a very light drizzle. Most rulers and measuring tapes include millimeter markings for accuracy.
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
| Millimeters (mm) | Astronomical Units (AU) |
|---|---|
| 1 mm | 6.685 × 10-15 AU |
| 2 mm | 1.337 × 10-14 AU |
| 5 mm | 3.342 × 10-14 AU |
| 10 mm | 6.685 × 10-14 AU |
| 25 mm | 1.671 × 10-13 AU |
| 50 mm | 3.342 × 10-13 AU |
| 100 mm | 6.685 × 10-13 AU |