Convert Fathoms to Earth Radius
Convert Fathoms (ftm) to Earth Radius (R⊕) instantly and accurately.
Conversion Formula
R⊕ = ftm × 2.867311582e-7
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.
About Earth Radius
The Earth radius (R⊕) is approximately 6.371 million meters or 6,371 kilometers, representing the average distance from Earth's center to its surface. Due to Earth's rotation, it's slightly flattened, with the equatorial radius being about 21 km larger than the polar radius. This fundamental measurement is crucial in geology, geography, and astronomy for calculating Earth's circumference (about 40,000 km), surface area, and volume. It's also used as a comparative unit for describing other planets and exoplanets.
Quick Reference Table
| Fathoms (ftm) | Earth Radius (R⊕) |
|---|---|
| 1 ftm | 2.867 × 10-7 R⊕ |
| 2 ftm | 5.735 × 10-7 R⊕ |
| 5 ftm | 1.434 × 10-6 R⊕ |
| 10 ftm | 2.867 × 10-6 R⊕ |
| 25 ftm | 7.168 × 10-6 R⊕ |
| 50 ftm | 1.434 × 10-5 R⊕ |
| 100 ftm | 2.867 × 10-5 R⊕ |