Convert Feet to Astronomical Units
Convert Feet (ft) to Astronomical Units (AU) instantly and accurately.
Conversion Formula
AU = ft × 2.037462155e-12
About Feet
A foot (ft) is equal to 12 inches or 30.48 centimeters, originally based on the length of a human foot. It remains widely used in the United States and some other countries for measuring height, room dimensions, and distances. For reference, a standard door is about 6.5-7 feet tall, ceiling height in homes is typically 8-9 feet, and a basketball hoop stands 10 feet high. The foot is also used in aviation (altitude) and real estate (square footage).
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
| Feet (ft) | Astronomical Units (AU) |
|---|---|
| 1 ft | 2.037 × 10-12 AU |
| 2 ft | 4.075 × 10-12 AU |
| 5 ft | 1.019 × 10-11 AU |
| 10 ft | 2.037 × 10-11 AU |
| 25 ft | 5.094 × 10-11 AU |
| 50 ft | 1.019 × 10-10 AU |
| 100 ft | 2.037 × 10-10 AU |