Earth's Equatorial Radius to Petameter
ConverterUnit Converter
Instant · Precise · Universal
32 units available
6 categories total
How to Convert Earth's Equatorial Radius to Petameter
To convert Earth radii to meters: multiply by 6,378,137.
R⊕(eq) = 6,378,137 m = 6,378.137 km. Earth's oblateness = (R_eq − R_pol)/R_eq ≈ 1/298.257.
For example, 1 Earth's Equatorial Radius (R⊕ (eq)) = 6.378137e-9 Petameter (Pm).
Earth's Equatorial Radius to Petameter — Common Values
| Earth's Equatorial Radius (R⊕ (eq)) | Petameter (Pm) |
|---|---|
| 0.1 | 6.378137e-10 |
| 0.5 | 3.189068e-9 |
| 1 | 6.378137e-9 |
| 2 | 1.275627e-8 |
| 5 | 3.189068e-8 |
| 10 | 6.378137e-8 |
| 25 | 1.594534e-7 |
| 50 | 3.189068e-7 |
| 100 | 6.378137e-7 |
| 500 | 0.0000031890685 |
| 1000 | 0.000006378137 |
About Earth's Equatorial Radius (R⊕ (eq))
The Earth's equatorial radius is the distance from Earth's center to the equator, approximately 6,378.137 km.
R⊕(eq) = 6,378,137 m = 6,378.137 km. Earth's oblateness = (R_eq − R_pol)/R_eq ≈ 1/298.257.
To convert Earth radii to meters: multiply by 6,378,137.
GPS calculations, satellite orbit determination, map projections, and geophysical modeling.
Earth is not a perfect sphere — the equatorial radius is about 21 km (0.3%) larger than the polar radius due to rotational flattening.
Using the equatorial radius as if Earth were a sphere — for precision, you must account for the oblate spheroid shape.
Earth's equatorial radius (6,378 km) vs. polar radius (6,357 km) shows the planet bulges at the equator due to spinning.
