Escape Velocity Calculator
Escape velocity from a planet or moon's mass and radius.
Enter your values
ⓘ Live results
Results
- Escape velocity
- 11186 m/s
- Escape velocity
- 11.19 km/s
- Escape velocity
- 25022 mph
Quick answer
Escape velocity v = sqrt(2GM/r).
v = sqrt(2GM/r)
How to use the Escape Velocity Calculator
- 1Enter the mass and radius of the planet or moon (Earth defaults are prefilled).
- 2The calculator applies the escape velocity formula using the gravitational constant.
- 3Compare results across planets by changing the mass and radius.
Worked example
Using the values the calculator loads with:
Inputs
- Body mass5.972e24 kg
- Body radius6371000 m
Results
- Escape velocity11186 m/s
- Escape velocity11.19 km/s
- Escape velocity25022 mph
Frequently asked questions
What is Earth's escape velocity?
About 11.2 km/s (roughly 25,000 mph) from the surface.
Does escape velocity depend on launch direction?
The ideal formula ignores atmosphere and rotation; real launches account for those factors too.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.