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Orbital Velocity Calculator

Compute the orbital velocity around a central body using v = √(GM/r) × √(1+e), an approximation that scales the circular-orbit speed by the eccentricity. Useful for first-order estimates of satellite velocities, planetary orbital speeds, and binary star systems.

Central Body Mass (kg)

Orbital Radius (meters)

Orbital Eccentricity

Fill in the required fields to see your result.

Astronomy

Escape Velocity Calculator

Find the minimum speed an object must reach to escape a celestial body's gravity without further propulsion. Essential for mission planning, planetary science, and understanding why some atmospheres are retained.

Body Mass (kg)

Body Radius (km)

Fill in the required fields to see your result.

Key differences

	Orbital Velocity Calculator	Escape Velocity Calculator
Category	Astronomy	Astronomy
Inputs required	3	2
Result	Orbital Velocity (m/s)	Escape Velocity (km/s)
What it does	Compute the orbital velocity around a central body using v = √(GM/r) × √(1+e), an approximation that scales the circular-orbit speed by the eccentricity. Useful for first-order estimates of satellite velocities, planetary orbital speeds, and binary star systems.	Find the minimum speed an object must reach to escape a celestial body's gravity without further propulsion. Essential for mission planning, planetary science, and understanding why some atmospheres are retained.