Orbital Period Calculator
Calculate the orbital period of a satellite or planet using Kepler's Third Law.
How to Use the Orbital Period Calculator
- Enter the semi-major axis of the orbit in metres.
- Enter the mass of the central body in kilograms.
- Click Calculate.
- Review the orbital period in seconds, days, and years.
Casi d'Uso
- •Satellite orbit design
- •Planetary science research
- •Astrophysics education
Formula
T = 2π√(a³ / (G·M))
Domande Frequenti
How accurate is this calculator?
Results are based on standard scientific formulas and are suitable for preliminary estimates.
What units are used?
SI units (metres, kg, seconds) are used unless otherwise noted.
Is it free?
Yes, all calculators are completely free.