Moon Phase Calculator
Calculate the moon phase for any given date. Learn about the lunar cycle and see the illuminated fraction.
Published by:
isCalculator Editorial Team
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How to use this tool?
- 1 Enter the requested data in the fields above carefully.
- 2 Click the calculate button to process the information instantly.
- 3 Analyze the detailed result and the formula explanation presented below.
- 4 You can print, share, or even embed the calculator on your own site for free.
Unlike traditional platforms, our AI tools adapt to specific user needs. They include detailed explanations of the formulas used, ensuring transparency in results. Furthermore, our design is focused on user experience, eliminating distractions and focusing on what really matters: your data and conclusions.
Previous Results
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Frequently Asked Questions
The calculation is based on the mean lunar cycle length and a known new moon reference. It is accurate to within a few hours for most dates between 1900 and 2100.
We use the synodic month of 29.53058867 days, which is the average time between new moons.
Moonrise and moonset times depend on the observer's latitude and longitude. This calculator provides a general phase calculation; for precise times, use a dedicated almanac.
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