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Free escape velocity calculator for planetary and orbital analysis. Estimate ideal minimum speed required to escape gravity from a given radius around a central mass.
Last updated: April 20, 2026
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Escape velocity
11186.0 m/s
Escape velocity
40269.5 km/h
mu = G x M
3.9859e+14 m^3/s^2
Specific kinetic energy
62563051 J/kg
Interpretation
Estimated escape velocity is 11186.0 m/s (40269.5 km/h).
Model note:
Ignores atmospheric drag, rotation assists, and propulsion losses. This is an ideal two-body energy estimate.
Equation
vesc = sqrt(2GM/r)
Parameter
mu = G x M
Results
m/s, km/h, J/kg
Earth mass and mean radius surface estimate
Escape velocity
11186.0 m/s
Escape velocity
40269.5 km/h
The calculator applies Newtonian gravity and conservation of energy. Escape occurs when kinetic energy is enough to offset gravitational potential without requiring additional propulsion in the idealized model.
mu = G x Mvesc = sqrt(2mu / r)specific KE = vesc^2 / 2Radius should be measured from the center of the central body for physically consistent results.
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