Big Three Calculator
Enter your birth date, time, and location to calculate your Sun, Moon, and Rising signs from one Swiss Ephemeris-backed chart.
Frequently Asked Questions
What are the Big Three in astrology?
The Big Three are your Sun sign, Moon sign, and Rising sign. Sun shows core identity, Moon shows emotional needs, and Rising shows first impressions and how your chart is oriented by house.
How do I find my Sun Moon and Rising signs?
Enter your birth date, exact birth time, and birthplace. Sun and Moon come from planetary longitude; Rising comes from the eastern horizon at your birth location and time.
Do I need my exact birth time for the Big Three?
Yes for Rising sign. The Ascendant changes quickly, about one degree every four minutes. Sun and Moon are less time-sensitive, though Moon can change sign near a boundary.
Is this different from a birth chart calculator?
The Big Three calculator is a focused summary of your full birth chart. The birth chart calculator includes every planet, houses, and aspects.
How accurate is this Big Three calculator?
It uses the same Swiss Ephemeris-backed chart calculation as the full birth chart calculator, with the project accuracy contract applied to Sun, Moon, and Rising placements.
Related calculators
- Birth Chart Calculator
See the full chart behind your Big Three: planets, houses, and aspects.
- Moon Sign Calculator
Go deeper on the emotional layer of your chart.
- Rising Sign Calculator
Calculate your ascendant and read the full rising sign interpretation.