Escape velocity calculator

Escape velocity is the speed at which an object’s kinetic energy matches the gravitational energy holding it back. It doesn’t depend on the object’s own mass. From Earth’s surface it’s about 11.2 km/s (40,000 km/h); from the Moon only 2.4 km/s, which is why lunar missions could return with small rockets. Real rockets don’t need to reach it all at once, since they keep pushing.

1. Distance from the center 6,371,000 m + 0 m = 6,371,000 m
2. √(2 G M ÷ r) √(2 × 6.6743 × 10⁻¹¹ × 5.9722 × 10²⁴ kg ÷ 6,371,000 m) = 11,186.2 m/s