Escape velocity Calculator

Calculates the escape velocities from the planet and from the solar system.

Escape velocity
the planet
Mass M
    1. kg
radius r
    1. km
Orbit radius R
    1. AU
    1. kg
Gravity G

the first cosmic velocity V1 
    2. km/s
    3. Orbit around the planet
the second cosmic velocity V2 
    2. km/s
    3. Escape velocity from the planet
orbital speed Vc 
    2. km/s
orbital period Tc 
    2. year
the third cosmic velocity V3 
    2. km/s
    3. Escape velocity from the solar system
The third cosmic velocities of the Sun and the moon are calculated as the escape velocities from the galaxy and the Earth respectively.
 Earth's mass=5.974E24
 Sun's mass=1.989E30
 Galaxy's mass=2.8E41

Escape velocity
[1-5] /5Disp-Num
[1]  2017/11/07 04:49   Male / 50 years old level / A teacher / A researcher / Useful /
Purpose of use
Trying to compute solar escape velocity from Pluto''s orbit (NOT from the surface of Pluto, or from orbit AROUND Pluto.)
I wish the variables M, R and r were explained or shown in the diagram. What do they refer to? In my question (trying to compute solar escape velocity from Pluto''s orbital altitude, is M the mass of the Sun? Is R Pluto''s orbital distance from the Sun? Why are the units for R and r different? Etc.
[2]  2017/08/30 14:23   Male / 50 years old level / Others / Useful /
Purpose of use
To determine the range of velocities of impact debris from a meteor strike on the Moon that would wind up in orbit around Earth (that is, between Lunar escape velocity and the minimum velocity that would allow correctly aimed debris to leave Earth''s vicinity). Also later to get escape from Saturn parameters from Saturn''s moon Titan.
[3]  2016/11/03 21:05   Male / 20 years old level / An office worker / A public employee / Very /
Purpose of use
To illustrate that a proposed Aldrin Cycler travelling at 0.1c would not be feasible: such a spacecraft would pass Mars just once, before travelling out deep into the void beyond the solar system, any passengers doomed to starve and freeze to death if the oxygen didn't run out first.
[4]  2016/02/11 02:12   Male / Under 20 years old / High-school/ University/ Grad student / Very /
Purpose of use
To calculate escape velocities of various planets
[5]  2014/07/14 20:03   Male / 60 years old level or over / High-school/ University/ Grad student / Very /
Purpose of use
To prove the reason, why the size (mass) of the Lunar Module could be so small in comparaison with that of the Saturn V, while the aim of both was around the same, and the mass proportion was less. (One of the arguments of Apollo hoax theory.)


Thank you for your questionnaire.
Sending completion


To improve this 'Escape velocity Calculator', please fill in questionnaire.
Male or Female ?
Male Female
Under 20 years old 20 years old level 30 years old level
40 years old level 50 years old level 60 years old level or over
Elementary school/ Junior high-school student
High-school/ University/ Grad student A homemaker An office worker / A public employee
Self-employed people An engineer A teacher / A researcher
A retired person Others
Very Useful A little Not at All
Purpose of use?
Comment/Request (Click here to report a bug).Bug report (Click here to report questionnaire.)
Calculation bug(Please enter information such as specific input values, calculation result, correct result, and reference materials (URL and documents).)
Text bug(Please enter information such as wrong and correct texts)
Your feedback and comments may be posted as customer voice.