Acceleration due to Gravity Calculator

Compute surface gravity g = G·M/r² for any planet, moon, or custom body using Newton's law of gravitation.

Frequently Asked Questions

What is the formula for surface gravity?

g = G·M / r², where G = 6.674e-11 N·m²/kg², M is the body's mass, and r its radius.

What is Earth's gravity?

About 9.81 m/s² at sea level. It varies slightly with latitude (poles vs equator) and altitude.

How much gravity is on Mars or the Moon?

Mars: ~3.71 m/s² (0.38 g). Moon: ~1.62 m/s² (0.17 g). Both lighter because of smaller mass.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.