Orbital Period Calculator
Kepler's third law for any orbit.
Enter your values
Results update instantly as you type — no submit needed.
Results
- Orbital period
- 97.14 minutes
- Period in hours
- 1.619
- Orbital velocity
- 7.546 km/s
- Orbits per day
- 14.82
Quick answer
Orbital period grows with the three-halves power of orbital radius.
T = 2π√(r³ ÷ GM)
How to use the Orbital Period Calculator
- 1Enter the orbital radius from the body's centre.
- 2Enter the central body's mass.
- 3Read period and velocity.
Frequently asked questions
What is low Earth orbit period?
About 90 minutes at 400 km altitude.
Does satellite mass matter?
No — orbital period is independent of the orbiting body's mass.