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Sun, Moon & Rising Sign Calculator
Your Big Three in seconds. Enter your birth details to reveal the three signs at the heart of your chart — free, accurate, and no signup needed.
Quick answer
Your Big Three are the signs your Sun, Moon and Ascendant (rising sign) were in at the moment you were born. Aurae calculates all three from your birth date, exact time and place — the Sun and Moon from an astronomical ephemeris, the rising sign from the sky over your birthplace. The rising sign changes about every two hours, so it needs an accurate birth time.
Discover your Big Three
Your Sun, Moon, and Rising signs — the three pillars of who you are. Calculated in real time from your exact birth moment.
What is your Big Three?
Sun sign
Your core identity — the essential "you" and what you’re growing toward.
Moon sign
Your emotional inner world — how you feel, comfort yourself, and process life.
Rising sign
Your Ascendant — the first impression you give and how you approach the world.
Frequently asked questions
What are the Sun, Moon, and Rising signs?
They’re your "Big Three" — the three most important placements in your chart. Your Sun sign is your core identity, your Moon sign is your emotional inner world, and your Rising sign (Ascendant) is how you come across to others and the lens through which you meet the world.
What is a rising sign?
Your rising sign, or Ascendant, is the zodiac sign that was rising on the eastern horizon at the time and place you were born. Astrologers read it as your outward style and the first impression you make, and it sets the order of the houses in your chart: in Whole Sign houses, which Aurae uses, your rising sign is your 1st house.
Do I need my exact birth time to find my Rising sign?
Yes — your Rising sign changes roughly every two hours, so an accurate birth time is essential to calculate it correctly. Your Sun and Moon signs can be found with just your birth date (and, for the Moon, approximate time).
How is this calculator accurate?
It calculates positions for your actual birth moment instead of reading a sun-sign table. The Sun and Moon come from the astronomy-engine ephemeris (tropical zodiac); the rising sign is computed from local sidereal time at your birthplace; and your birth time is converted to Universal Time with the time-zone rules in force that day. Tested against an AA-rated reference chart, it matches the Sun and Moon within 0.03° and the Ascendant within 0.002°.
Is it really free?
Yes. Calculating your Big Three is completely free and requires no account. A free Aurae account saves your chart and shows your birth-chart wheel and Big Three, plus one placement from your chart each day. Pro lists every planet’s sign, degree and house — Chiron and the lunar nodes included — with your house cusps and solar return; personalized AI chart readings are part of Premium.