What is the mass of the Earth?
The mass of the Earth is M_E = 5.9722e24 kg (uncertainty ±6e20 kg), based on IAU 2015 nominal values.
Open the interactive PhysRef tool →Key facts
| Value | 5.9722e24 kg |
|---|---|
| Symbol | M_E |
| Uncertainty | ±6e20 kg |
| Approximation | ≈ 5.97e24 kg |
| Source | IAU 2015 (Resolution B3) |
Frequently asked questions
What is the mass of the Earth in kg?
M_E = 5.9722e24 kg, about 5.97 septillion kilograms.
How is Earth's mass determined?
From the gravitational parameter GM_E measured via satellite orbits, divided by the gravitational constant G.
How does Earth's mass compare to the Sun's?
The Sun (1.98892e30 kg) is about 333,000 times more massive than the Earth.
Related pages
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