Birth Chart Calculator

A birth chart maps the positions of celestial bodies at your exact moment of birth. The three most important placements are your Sun sign (determined by your birth date), your Moon sign (based on the Moon's ~29.5-day cycle), and your Rising sign (which changes roughly every 2 hours based on birth time).

This calculator estimates your Sun sign from standard zodiac date ranges. The Moon sign is approximated using a known lunar position reference point and the Moon's orbital period. Your Rising sign is estimated based on the principle that the Ascendant cycles through all 12 signs in 24 hours. Planetary positions for Mercury, Venus, and Mars use simplified orbital period calculations from a reference date.

For the most accurate results, especially for Moon and Rising signs, a professional ephemeris-based calculator with precise geocoding is recommended.