Tropical Birth Chart Calculator

This calculator uses the traditional tropical zodiac system.

The tropical zodiac is based on the seasons and the position of the Sun at the spring equinox. This is the system used by most Western astrologers. Each sign is exactly 30 degrees, starting with Aries at the spring equinox (March 20-21).

For more features including saving charts, transit charts, synastry charts, and more settings please use True Sky online astrology software.