Calculate escape velocity from a planet.
Escape velocity for Planet Escape Speed is the speed at which kinetic energy balances the gravitational potential energy holding an object on the surface. A smaller planet with weak gravity needs a much lower escape speed, which is why escaping a small moon is easy.
Planet Escape Speed
ve = sqrt(2GM/R)
ve = sqrt(2GM/R) Escape velocity for Planet Escape Speed is the speed at which kinetic energy balances the gravitational potential energy holding an object on the surface.
A smaller planet with weak gravity needs a much lower escape speed, which is why escaping a small moon is easy.
This calculator takes 3 inputs: Planet mass, Planet radius, Surface gravity. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.