Convert Astronomical Units to Fathoms
Convert Astronomical Units (AU) to Fathoms (ftm) instantly and accurately.
Conversion Formula
ftm = AU × 81801110400
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.
About Fathoms
A fathom (ftm) is equal to 6 feet or 1.8288 meters, traditionally based on the span of a man's outstretched arms. This unit has been used for centuries in maritime navigation to measure water depth and rope or cable lengths. While largely replaced by meters in modern nautical charts, fathoms remain in use by sailors and in naval traditions. The Mariana Trench, Earth's deepest point, reaches about 6,000 fathoms. The term 'to fathom' meaning 'to understand' derives from this nautical unit.
Quick Reference Table
| Astronomical Units (AU) | Fathoms (ftm) |
|---|---|
| 1 AU | 8.18 × 1010 ftm |
| 2 AU | 1.636 × 1011 ftm |
| 5 AU | 4.09 × 1011 ftm |
| 10 AU | 8.18 × 1011 ftm |
| 25 AU | 2.045 × 1012 ftm |
| 50 AU | 4.09 × 1012 ftm |
| 100 AU | 8.18 × 1012 ftm |