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Free tool

Chart Ruler Calculator

Your chart ruler is the planet that rules your rising sign, and it colours the tone of the whole chart. Enter your birth date, exact time and place to find it, along with the sign, degree and house it sits in. Everything is computed from real astronomy in your browser.

An exact birth time is required. Your chart ruler depends on your rising sign, which changes roughly every two hours, so even a rough time can point to the wrong ruler.
    Or enter coordinates manually

    How this works. Placements are calculated from real astronomy (the same engine used inside the Alya app), using the tropical zodiac and whole-sign houses. First we find your rising sign from your exact birth time and place, then we take that sign's modern ruling planet and read where it sits in your chart. Your details are used only in your browser to compute the chart, and the birth place lookup sends only the city name you type to a geocoding service to find its coordinates.

    For entertainment and reflection. Astrology is a symbolic tradition, not a science. This result is grounded in real planetary positions, but its meaning is interpretive and is not medical, psychological, legal or financial advice.