Convert Miles to Astronomical Units
Convert Miles (mi) to Astronomical Units (AU) instantly and accurately.
Conversion Formula
AU = mi × 1.075780018e-8
About Miles
A mile (mi) is 5,280 feet or approximately 1.609 kilometers, originating from the Roman 'mille passus' (thousand paces). It remains the primary distance unit in the United States and United Kingdom for road travel, with speed limits and distances posted in miles per hour (mph) and miles respectively. For perspective, a 15-20 minute drive in the city typically covers 2-4 miles, while a marathon is about 26.2 miles. The mile is also used in aviation (nautical miles) and running events.
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
| Miles (mi) | Astronomical Units (AU) |
|---|---|
| 1 mi | 1.076 × 10-8 AU |
| 2 mi | 2.152 × 10-8 AU |
| 5 mi | 5.379 × 10-8 AU |
| 10 mi | 1.076 × 10-7 AU |
| 25 mi | 2.689 × 10-7 AU |
| 50 mi | 5.379 × 10-7 AU |
| 100 mi | 1.076 × 10-6 AU |