Big 3 calculator
Your Sun, Moon and Rising signs (plus the Big 6: Mercury, Venus, Mars). Enter birth date, time and city: the Sun needs only the date, the Rising sign needs the time.
Sun, Moon and Rising: what each one does
☉ Sun sign: the core
Your ego, vitality and the kind of life that makes you feel most yourself. It’s the sign in horoscope columns and needs only your birth date.
☽ Moon sign: the inner life
Emotional reflexes, comfort and the way you nurture. The Moon moves a sign every 2½ days, so two people born days apart can share a Sun but not a Moon.
↑ Rising sign: the interface
Your manner, instinctive approach and the impression you make. It changes about every two hours, which is why the Big 3 needs a birth time. More on the rising sign calculator.
Putting the trio together
Start with the elements. A fire Sun with a water Moon (say Leo Sun, Pisces Moon) wants the spotlight but needs emotional safety first; a Virgo rising would add a composed, detail-minded surface on top of both. Harmony between the three is comfortable, while contrast often makes people harder to read and more interesting.
Then look at modality: cardinal signs start, fixed signs sustain, mutable signs adapt. A Big 3 heavy in fixed signs digs in; one heavy in mutable signs adapts easily but may struggle to commit.
The AI reading above (after you calculate) does exactly this for your combination, using only your real placements.
Questions people ask
What is the Big 3 in astrology?
Your Sun, Moon and Rising signs: the three most personal points in a birth chart. The Sun is identity and purpose, the Moon is emotional needs, and the Rising sign (Ascendant) is your outward style and first impression.
How do I find my sun, moon and rising?
Enter your birth date, time and city above. The Sun needs only the date, the Moon usually only the date, and the Rising sign needs a time accurate to about 15 minutes.
Which of the Big 3 is most important?
They answer different questions. Many astrologers say the Rising sign is how strangers see you, the Sun how acquaintances see you and the Moon how people you live with see you.
What is the Big 6 in astrology?
The Big 6 adds the three personal planets to the Big 3: Mercury (how you think and talk), Venus (how you love and what you value) and Mars (how you act and what drives you). The calculator shows all six.
Can I find my Big 3 without a birth time?
You can get your Sun sign and, on about two days out of three, a certain Moon sign. The Rising sign needs a time: it changes roughly every two hours. The calculator tells you whether the Moon changed sign on your birthday.
What if my Big 3 are all the same sign?
A “triple” (for example triple Leo) happens when you’re born around sunrise near a new Moon. The sign’s traits are concentrated, for better and worse, and the rest of the chart matters more for nuance.