Escape Velocity Calculator

Calculate escape velocity for planets and celestial bodies
Mass of the celestial body
Radius of the celestial body
Escape Velocity
meters per second
km/h
mph
Energy Required
Understanding Escape Velocity
Formula:
v = √(2GM/r)

Where:

  • v = Escape velocity
  • G = 6.674×10⁻¹¹ m³/(kg·s²) (Gravitational constant)
  • M = Mass of the celestial body
  • r = Radius of the celestial body
What is Escape Velocity?

Escape velocity is the minimum speed needed for an object to break free from the gravitational attraction of a celestial body without further propulsion.

Comparison:
  • Earth: ~11.2 km/s
  • Moon: ~2.4 km/s
  • Jupiter: ~59.5 km/s
  • Sun: ~617.5 km/s

Features

  • Calculate escape velocity for any celestial body
  • Results in multiple units (m/s, km/h, mph)
  • Calculate energy required to escape for any object mass
  • Preset values for all planets, the Moon, and the Sun
  • Detailed formula and explanation
  • Real-time calculations as you type

How to Use

  1. Enter the mass and radius of the celestial body, or select a preset
  2. View the calculated escape velocity in different units
  3. Optionally, enter an object mass to calculate the energy required to escape
  4. Compare with other celestial bodies using the comparison table