Days Until Full Moon
Count down the number of days left until the next bright full moon.
12
days until full moon
Saturday, September 26, 2026
About the Days Until Full Moon
The days until full moon is a free online lunar calculator that gives you an accurate answer in seconds. Count down the number of days left until the next bright full moon. 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 days until full moon, full moon countdown, next full moon. 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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