ChartOdyssey
Free browser-based astrology calculators for birth charts, Sun, Moon and Rising signs, compatibility, transits, and returns.
✦ Introduction
ChartOdyssey offers astrology calculators for exploring natal placements and chart relationships. Start with the Big 3 calculator or create a birth chart with tropical planetary positions, whole-sign houses, and major aspects. Other tools cover individual planet signs, compatibility, synastry, transit charts, and planetary returns. Birthplace matching, timezone handling, and chart calculations run locally in the browser. When birth time is unknown, the tools show relevant uncertainty and leave time-dependent results unavailable rather than inventing a value. Birth details are not sent to an external astrology calculation service.