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Moon Sign Calculator

Find your Moon sign from your birth date and time, using real astronomical calculation of the Moon's position.

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What Is the Moon Sign?

Your Moon sign is the zodiac sign the Moon occupied at your birth. Because the Moon moves fast — about 13° per day, changing sign every 2–2.5 days — birth time matters, not just the date. This tool computes the Moon's ecliptic longitude with a truncated Meeus lunar theory (accuracy well under a degree) and maps it to the sign.

In astrology the Moon sign is associated with emotions and instincts, complementing the Sun sign. Offered for entertainment.

Frequently Asked Questions

Why is birth time needed?

The Moon changes sign roughly every 2–2.5 days. If you were born on a boundary day, morning and evening can give different signs. If you do not know the time, noon minimizes the error.

How accurate is the calculation?

The lunar position is computed astronomically to within a fraction of a degree, more than enough to determine the sign except within minutes of an exact sign change.

What if I do not know my exact birth time?

Try 12:00 first, then 00:00 and 23:59. If all three give the same sign, your Moon sign is certain; if not, it changed sign on your birth day and the exact time decides.

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