Escape Velocity Calculator
Speed needed to leave a gravity well.
Enter your values
Results update instantly as you type — no submit needed.
Results
- Escape velocity
- 11185.98 m/s
- In km/s
- 11.186
- In mph
- 25,022
- Surface gravity
- 9.82 m/s²
- Orbital velocity (low orbit)
- 7.9097 km/s
Quick answer
Escape velocity is √(2GM/r) — the speed at which kinetic energy exactly cancels gravitational binding energy.
v = √(2GM/r)
How to use the Escape Velocity Calculator
- 1Enter the body's mass in kilograms.
- 2Enter its radius in metres.
- 3Scientific notation like 5.972e24 is accepted.
Frequently asked questions
What is Earth's escape velocity?
About 11.2 km/s, or 25,000 mph.
Does it depend on the escaping object's mass?
No — it is the same for a pebble or a rocket.