Escape Velocity Calculator
📐 Physics of Matter. Use the Escape velocity formula to find escape speed, planet mass, planet radius: pick the value you want, type the others, and the answer updates as you go.
Default: Earth.
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 speed | m/s |
| Planet mass | kg |
| Planet radius | m |
Worked example
Find the escape speed when Planet mass = 5.972 × 10²⁴ kg, Planet radius = 6.371 × 10⁶ m.
Using ve = √(2GM/R): Escape speed = 11186 m/s.
Frequently asked questions
What is the formula for Escape velocity?
ve = √(2GM/R). Default: Earth.
What do the letters stand for, and what units are used?
Escape speed in m/s, Planet mass in kg, Planet radius in m.
How do you calculate escape speed?
Put the values into ve = √(2GM/R). For example, with Planet mass = 5.972 × 10²⁴ kg, Planet radius = 6.371 × 10⁶ m, escape speed = 11186 m/s.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (escape speed, planet mass, planet radius) and fill in the others: it rearranges the formula for you.
