Natal chart calculator
Enter a birth date, time and place to get a natal chart instantly. Everything is computed in your browser—the birth data never leaves your device and is never uploaded. Four house systems (Placidus, Koch, Regiomontanus and Whole Sign), tropical and sidereal zodiac with a selectable ayanamsa, and an outer ring for transits or synastry. The four major asteroids and Chiron come from a self-built sampled ephemeris covering 1900–2100, built from JPL Horizons data and verified against it.
Not sure what to pick for house system, zodiac or ayanamsa? The defaults— Placidus with the tropical zodiac—are the standard combination in modern Western astrology. The transit timeline, the Vedic (jyotish) chart and the celestial globe are currently available in the Chinese version only.