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Escape Velocity Calculator
Find the speed an object needs to escape a planet's gravity forever, worked out from the planet's mass and radius alone.
v = √(2 × G × M ÷ r)
Escape speed depends only on the body's mass and radius, not on the mass of the object trying to escape.
Escape velocity
— m/s
The calculation runs entirely in your browser — no data leaves your device. Change any number and the answer updates instantly.