Escape Velocity Calculator
Calculate the minimum speed needed to escape the gravitational attraction of a planet, moon, star, or other spherical body. You can also calculate mass or radius from known escape velocity.
Calculate Escape Velocity
Gravitational Constant
G = 6.67430 × 10−11 m³·kg−1·s−2
Calculation Result
Escape Velocity
0 km/s
Formula Used
vₑ = √(2GM / R)
Velocity in m/s
0 m/s
Velocity in km/s
0 km/s
Velocity in km/h
0 km/h
Velocity in mph
0 mph
Escape velocity assumes no atmospheric drag and measures
the minimum initial speed required to escape without
additional propulsion.
What Is an Escape Velocity Calculator?
An Escape Velocity Calculator determines the minimum initial speed required for an object to escape the gravitational field of a planet, moon, star, or other massive body without further propulsion.
Escape velocity depends primarily on two properties of the attracting body: its mass and the distance from its center. For