Moon Age Calculator
Work out the lunar age of the moon on any date you choose.
Waxing Crescent
Illumination
14.7%
Moon Age
3.7 d
Distance
370k km
Trend
waxing
About the Moon Age Calculator
The moon age calculator is a free online lunar calculator that gives you an accurate answer in seconds. Work out the lunar age of the moon on any date you choose. Just pick a date and the calculator does the rest, using the same astronomy math NASA uses to track the moon.
People also search for this as a moon age calculator, lunar age, moon days old. Whatever you call it, this moon calculator is built to be fast, accurate, and easy to use on any phone or computer. There is no sign up, no download, and no cost — just open the page, type your date, and read the answer.
Every number on this page comes from a real moon phase calculation engine. That means the moon phase, the moon age, the illumination percent, and the moon distance are all computed from the same formulas used in astronomy textbooks. You can trust the result for school projects, sky watching plans, or simple curiosity about the night sky.
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