YOUR SKY ATLAS · THREE WAYS TO MEET YOURSELF
Big 3 Calculator
Find your Sun, Moon, and Rising signs together, with a short reading for each.
How to Use This Calculator
- Select the birth date and enter the local time from a reliable record. Choose the unknown-time option if needed.
- Search for the birthplace and select the matching city, region, and country.
- Select “Find My Big 3.” Review the calculated details before reading the interpretation.
Understanding Your Big 3
The Big 3 combine three different perspectives: the Sun’s sense of direction, the Moon’s emotional habits, and the Ascendant’s approach to new situations. These placements can agree or pull in different directions; reading them together gives a more nuanced starting point than a Sun sign alone.
Frequently Asked Questions
Why do I need a birth time for the Big 3?
The Ascendant changes quickly as Earth rotates. Without a recorded birth time, we can evaluate Sun and Moon possibilities for the day but cannot give a reliable Rising sign.
Are the Big 3 my complete chart?
They are an introduction. The full birth chart also includes other planets, houses, and the aspects connecting them.
Calculation Method and Limitations
All tools share local Swiss Ephemeris calculations, tropical zodiac, and historical IANA time-zone conversion. Unknown times limit the precision of degrees, houses, angles, and aspects. Read the full method and limitations or review Source & License.