Acceleration due to Gravity Calculator
Find surface gravity from a body's mass and radius.
Surface gravity depends on a body's mass and radius.
The math behind it
g = G·M ÷ r². Earth's values give about 9.82 m/s².
Worked example
Earth's mass and radius → about 9.82 m/s² (1 g).
FAQ
Why is the Moon's gravity weaker?
It has far less mass, despite its smaller radius.