Your sun sign is the headline. Your moon sign is the real story – the part of you that nobody sees but everyone feels. Enter your birth date below and we’ll calculate it using real astronomy, not a guess.
Moon Sign Calculator
Have you ever wondered why you don’t relate to your star sign?
Your sun sign is who you are at work, in public, on a first date. Your moon sign is who you are at 11pm with the lights off, or when you’re tired enough to drop the act.
The moon rules emotions, instinct, comfort, what you reach for when stressed. Two people with the same sun sign and different moon signs will react completely differently to the same situation.
Knowing your moon sign tells you how to actually take care of yourself — the rituals, the rest, the food, the people that genuinely settle your system rather than the ones you think should.
Most online moon sign calculators use rough lookup tables. Ours uses the same Meeus algorithms professional astrologers and astronomy software rely on — accurate to a fraction of a degree.
The moon moves roughly 13° per day, which means your sign can change between morning and evening of the same date. If you know your birth time, the calculation will be precise. If you don’t, we’ll calculate for noon and flag any uncertainty.
That’s why birth time matters — the moon can change signs in 24 hours.
Same algorithms used by professional astronomical software.
Knowing your moon sign is step one. Understanding what it means — for your relationships, your work, your nervous system — is what Moon Circle is for. Twelve sign-led courses, monthly workshops, and a private group of women learning together.
