How to use it
- Enter central-body mass in kilograms.
- Enter radius or distance from its center in meters.
- Calculate ideal escape velocity.
Escape Velocity Calculator
Estimate ideal escape velocity from an entered mass and center-to-center distance.
Important: This calculator is an educational estimate only. It is not aviation, navigation, flight planning, fuel or reserve planning, aircraft or rocket design, certification, launch, propulsion, mission, weapon, maintenance, legal, regulatory, emergency, operational, or safety advice.
About the Escape Velocity Calculator
Escape velocity is represented here by an ideal point-mass Newtonian relationship at an entered radius.
Formula
v = √(2GM ÷ r), using G = 6.67430 × 10⁻¹¹ m³/(kg·s²).
Example
An Earth-like mass and mean radius produce an ideal value near 11.19 km/s.
Notes
Atmosphere, rotation, propulsion, trajectory and other bodies are excluded. The result is an educational reference, not operational guidance.