Science Calculators
Escape Velocity Calculator
Choose a planetary body (or enter a custom mass and radius) to calculate its escape velocity.
11.19 km/s
11186 m/s
Uses v = √(2GM/r), the minimum speed needed to escape a body's gravity from its surface with no further propulsion. Earth's is famously about 11.2 km/s.
How to use this tool
- 1Choose a preset body or enter a custom mass and radius.
- 2See the calculated escape velocity.
Frequently asked questions
Why is Earth's escape velocity about 11.2 km/s?+
It comes from v = √(2GM/r) using Earth's mass and radius — any object needs at least that speed at the surface to escape Earth's gravity without further propulsion.