ZodiacKit
en

6 free tools

Birth chart tools

Everything that needs a birth time and place: the natal chart wheel, your Ascendant, relationship charts, your yearly solar return and planetary hours.

Birth Chart CalculatorEnter your birth date, time and city to draw your natal chart wheel with houses and aspects, worked out from real planetary positions.Rising Sign CalculatorFind your rising sign (Ascendant) and see how it changed hour by hour on the day you were born.Big Three CalculatorYour Sun, Moon and rising sign in one card, with a ready-made image for stories and posts.Synastry ChartCompare two birth charts: see how one person’s planets aspect the other’s, and where they fall in each other’s houses.Solar Return ChartFind the exact moment of your solar return and see the chart cast for wherever you spend your birthday.Planetary HoursThe traditional planetary hours of any day and place, based on actual sunrise and sunset.

Why time and place matter

Planet signs change slowly, but the Ascendant moves through all twelve signs in about a day, roughly one degree every four minutes. Houses are built from that horizon, so the birth city and the clock time decide which house each planet falls in. Pick a city from over 30,000 places and the tools use its coordinates and historical time zone, including daylight saving time in force on the date, and show the UTC offset used so you can check it.

How the charts are calculated

Positions come from a published astronomical model running in your browser: geocentric, tropical, true equinox of date. Houses default to Placidus, with Whole Sign and Equal houses one click away. Nothing you enter is uploaded. Interpretation lines follow astrological tradition and are offered for entertainment and self-reflection.

All tools