Moon Phase Calculator
Discover the moon phase, illumination percentage, and lunar age for any date you choose.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
This calculator finds the moon phase, illumination percentage, and moon age (days since the last new moon) for any date, based on the 29.53-day synodic month referenced to a known new moon in January 2000.
Astronomers and stargazers use it to plan observation nights around a dark, moonless sky; photographers time full-moon shots with it; gardeners follow moon-phase planting traditions; and it's also handy for anyone tracking lunar calendar events tied to a specific moon phase.
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