Convert Foot (US Survey) (ft (US)) to Earth's Polar Radius (R⊕ (p)) instantly.
Foot (US Survey) to Earth's Polar Radius conversion
1 Foot (US Survey) (ft (US)) = 4.7948923e-8 Earth's Polar Radius (R⊕ (p)). To convert Foot (US Survey) to Earth's Polar Radius, multiply the value by 4.7948923e-8.
| Foot (US Survey) (ft (US)) | Earth's Polar Radius (R⊕ (p)) |
|---|---|
| 1 | 4.7948923e-8 |
| 2 | 9.5897846e-8 |
| 5 | 2.3974461e-7 |
| 10 | 4.7948923e-7 |
| 25 | 0.0000011987231 |
| 50 | 0.0000023974461 |
| 100 | 0.0000047948923 |
| 1000 | 0.000047948923 |
Frequently asked questions
How many Earth's Polar Radius are in one Foot (US Survey)?
One Foot (US Survey) (ft (US)) equals 4.7948923e-8 Earth's Polar Radius (R⊕ (p)).
How do I convert Foot (US Survey) to Earth's Polar Radius?
To convert Foot (US Survey) to Earth's Polar Radius, multiply the value by 4.7948923e-8.
What is 10 Foot (US Survey) in Earth's Polar Radius?
10 Foot (US Survey) = 4.7948923e-7 Earth's Polar Radius.
About these units
Foot (US Survey) (ft (US))
The US Survey Foot is a standardized version of the foot, defined as exactly 1200/3937 meters (~0.30480061 m). It was adopted to maintain continuity with older surveying records when converting to the metric system. Surveyors, engineers, and geographers in the United States used this unit for mapping, cadastral surveys, and infrastructure projects. Its slight difference from the international foot allows historical survey data to align accurately with modern geodetic coordinates. Although the international foot is now more common, the US survey foot remains relevant for interpreting historical survey data and legal property boundaries.
Earth's Polar Radius (R⊕ (p))
The Earth's polar radius is approximately 6,356.8 km, slightly shorter than the equatorial radius due to the Earth's flattening at the poles. This measurement is critical in modeling Earth's shape, gravity field, and rotation. It impacts satellite orbits, geodetic surveys, and global positioning systems (GPS). The difference between the equatorial and polar radii also explains phenomena such as centrifugal force variations, equatorial bulges, and sea level differences across latitudes. Understanding R⊕ (p) is essential for precision navigation, Earth science, and astronomy.