Megameter to Earth's Equatorial Radius
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How to Convert Megameter to Earth's Equatorial Radius
For example, 1 Megameter (Mm) = 0.1567855943 Earth's Equatorial Radius (R⊕ (eq)).
Megameter to Earth's Equatorial Radius — Common Values
| Megameter (Mm) | Earth's Equatorial Radius (R⊕ (eq)) |
|---|---|
| 0.1 | 0.01567855943 |
| 0.5 | 0.07839279714 |
| 1 | 0.1567855943 |
| 2 | 0.3135711886 |
| 5 | 0.7839279714 |
| 10 | 1.567855943 |
| 25 | 3.919639857 |
| 50 | 7.839279714 |
| 100 | 15.67855943 |
| 500 | 78.39279714 |
| 1000 | 156.7855943 |
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.
