Escape & Orbital Velocity Calculator
Escape velocity, circular orbital velocity, surface gravity and orbital period for planets or any custom body.
How to use the Escape & Orbital Velocity Calculator
- Enter or select: Body, Altitude above surface.
- Fill in what you know of: Custom mass, Custom radius — leave the unknown empty.
- The results (Escape velocity, Circular orbital velocity, Gravity at altitude, Orbital period, Mean density) are calculated instantly as you type.
- Use “Copy link” to share the calculation with the same input values.
Formula
- v_esc = √(2GM/r)
- v_orb = √(GM/r)
- T = 2π√(r³/GM)