About the Escape Velocity Calculator
Calculates escape velocity for any planet, moon, star, or custom body using v = √(2GM/r).
What it is
Pick one of 11 preset bodies (Mercury through Neptune, Pluto, the Moon, and the Sun) with accurate mass and radius data prefilled, or switch to custom mode and enter any mass and radius to compute the escape velocity of a hypothetical body.
Features
Real physical data
Preset bodies use accurate published mass and radius values.
Custom mass/radius mode
Enter any mass (with scientific notation) and radius for a hypothetical body.
Multi-unit output
Results shown in m/s, km/s, km/h, and mph simultaneously.
Earth-comparison view
Every result is compared against Earth's own escape velocity of 11.19 km/s.