Foot to Earth's Equatorial Radius Converter
Unit Converter
Instant · Precise · Universal
32 units available
6 categories total
How to Convert Foot to Earth's Equatorial Radius
To convert feet to meters: multiply by 0.3048. To convert meters to feet: multiply by 3.28084.
1 ft = 12 in = 0.3048 m = 1/3 yd = 30.48 cm.
For example, 1 Foot (ft) = 4.778825e-8 Earth's Equatorial Radius (R⊕ (eq)).
Foot to Earth's Equatorial Radius — Common Values
| Foot (ft) | Earth's Equatorial Radius (R⊕ (eq)) |
|---|---|
| 0.1 | 4.778825e-9 |
| 0.5 | 2.389412e-8 |
| 1 | 4.778825e-8 |
| 2 | 9.557650e-8 |
| 5 | 2.389412e-7 |
| 10 | 4.778825e-7 |
| 25 | 0.000001194706228 |
| 50 | 0.000002389412457 |
| 100 | 0.000004778824914 |
| 500 | 0.00002389412457 |
| 1000 | 0.00004778824914 |
About Foot (ft)
Definition
The foot is a unit of length equal to 12 inches or exactly 0.3048 meters.
Mathematical Relationship
1 ft = 12 in = 0.3048 m = 1/3 yd = 30.48 cm.
Conversion Formula
To convert feet to meters: multiply by 0.3048. To convert meters to feet: multiply by 3.28084.
Practical Applications
Building plans, ceiling heights, personal height, pool depth, altitude in aviation, and real estate listings.
Interesting Facts
The international foot (0.3048 m exactly) differs slightly from the US survey foot (1200/3937 m), which was deprecated in 2023.
Common Mistakes
Confusing the foot with 30 cm (it's 30.48 cm). Also, forgetting that 5′10″ is not 5.10 feet — it's 5 feet 10 inches = 5.833 feet.
Educational Tips
There are 3 feet in a yard and 5,280 feet in a mile. A 6-foot person is about 1.83 meters tall.
About Earth's Equatorial Radius (R⊕ (eq))
Definition
The Earth's equatorial radius is the distance from Earth's center to the equator, approximately 6,378.137 km.
Mathematical Relationship
R⊕(eq) = 6,378,137 m = 6,378.137 km. Earth's oblateness = (R_eq − R_pol)/R_eq ≈ 1/298.257.
Conversion Formula
To convert Earth radii to meters: multiply by 6,378,137.
Practical Applications
GPS calculations, satellite orbit determination, map projections, and geophysical modeling.
Interesting Facts
Earth is not a perfect sphere — the equatorial radius is about 21 km (0.3%) larger than the polar radius due to rotational flattening.
Common Mistakes
Using the equatorial radius as if Earth were a sphere — for precision, you must account for the oblate spheroid shape.
Educational Tips
Earth's equatorial radius (6,378 km) vs. polar radius (6,357 km) shows the planet bulges at the equator due to spinning.