Tropical Placidus Birth Chart Calculator

This calculator uses traditional tropical zodiac system and Placidus house 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).

The Placidus house system is the most widely used house system in Western astrology. It divides the ecliptic based on time rather than space, creating houses of unequal size that reflect the natural rhythm of the Earth's rotation. This system is particularly effective for psychological and character analysis.

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