How this calculator works
Enter the values for value, rate (%) and review the units before calculating.
Formula / method
vₑ = √(2GM ÷ r)
Worked example
Earth’s mass and radius give an escape speed of about 11.19 km/s.
Assumptions and limitations
The body is spherical, non-rotating and atmospheric drag is ignored.
Escape velocity is not a launch trajectory or fuel estimate.