About this tool
Find the speed needed to escape the gravity of a planet, moon or star.
v = √(2·G·M ÷ r) with G = 6.6743 × 10⁻¹¹ m³/(kg·s²). Pick a body or enter its mass and radius.
Formula: v = √(2GM/r)
Example: Body = Earth → Escape velocity (km/s) = 11.186.
Ignores air resistance and the body’s rotation.
Quick steps
- Enter your values — every field shows its unit.
- Press Calculate (or Try an example to see how it works).
- Read the results and copy them if you need them elsewhere.
The calculation runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Escape Velocity Calculator work?
v = √(2·G·M ÷ r) with G = 6.6743 × 10⁻¹¹ m³/(kg·s²). Pick a body or enter its mass and radius.
What should I keep in mind?
Ignores air resistance and the body’s rotation.
Is my data sent anywhere?
No. The numbers stay on your device; the page only shows the result.