Escape Velocity Calculator

Escape velocity is the minimum speed needed to leave a world’s gravity without further propulsion (ignoring air resistance). Choose a planet or use custom values.

Pick a world or choose custom inputs.
Earth is 5.972 × 10²⁴ kg.
Earth radius is 6,371 km.
How we calculate

Escape velocity: v = √(2GM/R). We use G = 6.674×10⁻¹¹ SI units. Mass is entered in ×10²⁴ kg and radius in km, then converted to meters.