How this calculator works
Enter the values for first value, second value and review the units before calculating.
Formula / method
P = √(a³ ÷ M)
Worked example
An object at 1 AU around a 1-solar-mass star has a 1-year period.
Assumptions and limitations
The orbit is bound, the central mass dominates, and AU/solar-mass units are used.
Eccentricity, additional bodies and relativistic effects are ignored.