☽ Moon Sign Calculator
Your Sun sign is your ego — your Moon sign is your heart. Enter your birth date (and time if you know it) to discover yours.
Approximate astronomical calculation, for entertainment. For an exact chart consult an ephemeris with your birth time & place. 💜
What Is a Moon Sign?
Your Moon sign is the zodiac sign the Moon was travelling through when you were born. While your Sun sign describes your outer personality, your Moon sign rules your inner world — emotions, instincts, needs and how you love. Many astrologers consider it the most important placement for relationships.
Moon Sign vs Sun Sign
Think of it this way: your Sun sign is what the world sees; your Moon sign is what your partner gets. Two people with clashing Sun signs often thrive if their Moon signs harmonise — emotional compatibility lives in the Moon. That’s why checking Moon sign compatibility can explain attractions your Sun signs never could.
How This Calculator Works
The calculator uses a low-precision lunar longitude formula (the Moon’s mean longitude plus its main periodic correction) to estimate the Moon’s zodiac position for your birth date and time. Adding your birth time improves accuracy since the Moon changes signs roughly every 2.3 days. Results are approximate and for entertainment.
Frequently Asked Questions
What is my Moon sign if I don’t know my birth time?
You can still calculate it — the tool defaults to noon, which is correct for most of the day. Only if you were born within a few hours of the Moon changing signs could the result differ.
Which Moon sign is best in love?
Every sign loves beautifully in its own way — but Water Moons (Cancer, Scorpio, Pisces) are famed for depth, and Earth Moons (Taurus, Virgo, Capricorn) for loyalty.
Can I check compatibility with my Moon sign?
Yes! Once you know your sign, run our Moon Sign Compatibility Calculator with your partner’s sign.