Free online tools for astrological calculations
Enter your date, time and place of birth - get a complete natal chart with planet positions, houses and aspects.
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Enter the data of two people and get a detailed compatibility analysis based on astrological synastry.
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Find out which transiting planets aspect your natal chart on any date.
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Moon day, lunar phase, zodiac sign, and Void of Course - for today and the entire month.
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Discover your Type, Strategy, Authority and Profile by birth date. Free online Human Design calculator.
Learn more → Today's trends - short astrology brief
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Chaldean planetary hours for any city and date: the ruler of the day, exact sunrise and sunset, and 24 unequal hours with their ruling planets.
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A relationship chart from two birth dates: midpoints of the planets and angles, aspects inside the composite, wheel and coordinate table.
Learn more → Exact dates of transiting planets' aspects to your natal chart for the selected period.
Learn more → The exact moment the Sun returns to its natal longitude, and the chart for that moment. Calculated in your browser with Swiss Ephemeris, no sign-up.
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A chart for the moment of the question with radicality checks: planetary hour, void of course Moon, Via Combusta, and the Moon's next aspect.
Learn more →If this is your first visit, start with the natal chart. Almost every other tool needs it: transits, synastry, astrocartography and the forecasts all draw on it. Enter the data once, save the chart, and it fills in automatically from then on.
All calculations run in your browser through Swiss Ephemeris, the same library professional astrological software is built on. Planetary positions are accurate to the arcsecond, house cusps to the arcminute.
Questions about yourself go to the natal chart, questions about relationships to synastry and the composite, questions about timing to transits and the daily forecast. A specific closed question such as will this deal go through belongs to horary, and choosing a moment to act belongs to planetary hours and the lunar calendar.
Human Design stands apart: it is not astrology in the classical sense but a system of its own with types, strategy and authority, even though the calculation also rests on planetary positions.
The natal chart, transits, synastry, the lunar calendar, planetary hours, the daily forecast and the Human Design bodygraph all work without payment and without a cap on how many charts you calculate.
A subscription opens the deeper methods: every house system, progressions, directions, astrocartography, fixed stars, Arabic lots, unlimited saved charts and AI interpretations. The plans are compared on the pricing page.
Create your first natal chart in minutes. Free, precise, and private. 7-day PRO trial included.
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