What is the Moon Phase Calculator?
The Moon goes through its phases every 29.53 days – new moon, waxing crescent, first quarter, waxing gibbous, full moon and back again. Pick any date to see the phase, how much of the Moon is lit, its age in days, and the dates of the next new and full moon. A monthly calendar shows every night’s phase.
How to use the Moon Phase Calculator
- Choose a date (today by default).
- See the phase, illumination and moon age.
- Browse the monthly moon calendar.
Note
Times are calculated astronomically and can differ by several hours from local moon-sighting announcements for Islamic months.
This Moon Phase Calculator is 100% free, needs no signup and runs privately in your browser – on phone, tablet or computer.
Last updated: · By NodifyTech