Moon Phase Calculator
Calculate the moon phase for any date with visual representation. See full moon, new moon, and lunar cycle data. Free moon phase tool.
Select Date
Waxing Gibbous
Saturday, March 28, 2026
Upcoming Phases
Lunar Cycle Progress
About Moon Phase Calculator
Calculate the moon phase for any date using the synodic period algorithm (29.53-day cycle). Shows phase name, illumination percentage, days until next full and new moons, and a visual representation. Based on astronomical calculations from a known new moon reference date.
How to Use Moon Phase Calculator
Enter your values
Open Moon Phase Calculator and enter the values you want to calculate or convert.
Select units or options
Choose the input and output units, formats, or calculation parameters.
View results instantly
Results are calculated in real-time as you type — no submit button needed.
Copy or use the result
Copy the calculated result or use it directly in your work.
Frequently Asked Questions
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