Escape Velocity Calculator

Calculate the speed needed to escape a celestial body's gravity.
Calculator
Enter your values
Results
Escape Velocity
11.19 km/s
Mach Number
Mach 32.6
Exact Speed
11,186 m/s
Analysis
Interpretation of the current calculator output

Calculation Summary

The current inputs have been processed for the escape velocity calculator. Review the results panel for the computed output and use the charts tab to compare the current values visually.

How to Read It

The main result shows the direct answer for your current inputs. Supporting sections below explain the method, example, and common questions so the result is easier to interpret.

How to Use

Step-by-step instructions
  1. 1Select a preset planet or enter custom values.
  2. 2Enter mass and radius.
  3. 3The calculator computes the escape velocity.

Escape Velocity

Determines the minimum speed required for an object to escape the gravitational influence of a massive body.
v = √(2GM / r)

Variables:

GGravitational Constant
MMass of body
rDistance from center

Example

Earth Escape

Inputs:

Mass:5.97 × 10²⁴ kg
Radius:6,371 km

Steps:

  1. 1.v = √(2 × 6.67e-11 × 5.97e24 / 6.37e6)
  2. 2.v ≈ 11,186 m/s
Result:
11.2 km/s

Frequently Asked Questions

Does mass of the object matter?

No, the escape velocity depends only on the mass and radius of the celestial body, not the mass of the escaping object (assuming the object is much smaller).