Free tool
Moon sign calculator
Your Moon sign with the real degree. And if you don't know your birth time, you get the honest answer: on two out of three days the sign is unambiguous anyway, and on the rest we show both candidates and the exact switch time.
Where other calculators cheat
The Moon travels about 13 degrees per day and changes sign every two and a half days. Many moon sign calculators silently assume noon when the birth time is missing and return a single sign, even on days when the Moon switched. Anyone born shortly before or after a switch gets the wrong sign with fifty percent probability, and never learns it. This calculator computes the whole day in your birth time zone instead, and tells you whether the answer is definite.
More on what works honestly without a birth time, and what does not, in the article Birth time unknown: what still works.
Frequently asked questions
What is the Moon sign?
The zodiac sign the Moon occupied at the moment of your birth. While the Sun spends about a month per sign, the Moon changes sign every two and a half days. Astrologically, the Moon sign stands for the emotional life, the needs, and what happens without thinking.
Do I need the exact birth time?
Often not. On roughly two out of three days the Moon stays in one sign all day; then the date is enough, and the calculator tells you so explicitly. If the Moon changed sign on your birthday, the calculator shows both candidates and the exact switch time in your birth time zone.
Why do other calculators ask for a birth place and this one doesn't?
For the Moon's position the time zone is enough, and that is what we ask for, resolved historically including daylight saving time. The place is needed for the Ascendant and the houses; the app computes those, on your device.
How accurate is the position?
Geocentric apparent ecliptic longitude of date, accurate to about one arcminute, the same order the app's engine documents against Swiss Ephemeris on the accuracy page. Sign changes are refined to the minute.
Is my data stored?
No. The computation runs entirely in your browser, with no server call and nothing stored.