Determine the exact moon phase for any date. See whether it is a new moon, first quarter, full moon, or last quarter.
Enter your values below
Date to check the moon phase for.
Northern or Southern hemisphere for visual orientation.
How this calculator works
Calculates the lunar phase by determining the number of days since a known new moon and dividing by the synodic period.
Common questions about this calculator
These calculators are for informational purposes only. While we strive for accuracy, results should not be used as the sole basis for important decisions.
