Escape Velocity Calculator
🪐 Gravity & circular motion. Use the Escape velocity formula to find escape velocity, planet mass, radius: pick the value you want, type the others, and the answer updates as you go.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Escape velocity | m/s |
| Planet mass | kg |
| Radius | m |
Worked example
Find the escape velocity when Planet mass = 5.97 × 10²⁴ kg, Radius = 6.37 × 10⁶ m.
Using vesc = √(2GM/r): Escape velocity = 11185 m/s.
Frequently asked questions
What is the formula for Escape velocity?
vesc = √(2GM/r).
What do the letters stand for, and what units are used?
Escape velocity in m/s, Planet mass in kg, Radius in m.
How do you calculate escape velocity?
Put the values into vesc = √(2GM/r). For example, with Planet mass = 5.97 × 10²⁴ kg, Radius = 6.37 × 10⁶ m, escape velocity = 11185 m/s.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (escape velocity, planet mass, radius) and fill in the others: it rearranges the formula for you.
