Online Astrology with AI
Online Astrology with AI — Explore the tools in this section and choose a reading for your question. Each page explains how it works and what the result includes.
Birth Chart
Enter your birth date, time and city. Historical time offsets are applied automatically to calculate the Sun, Moon and Ascendant and show their saved interpretations.
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Ascendant Calculator
Calculate your ascendant from your birth date, time and city and explore its description, traits and advice.
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Moon Sign
Moon Sign: Enter the requested details and view the tool’s result. Free, with no registration.
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Sun Sign
Sun Sign: Enter the requested details and view the tool’s result. Free, with no registration.
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Zodiac compatibility
Compare two signs in love, friendship and work. Explore symbolic affinity, examples and questions for conversation. Free, with no registration.
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Lunar calendar
Check Moon phases, illumination and upcoming new and full Moons. Browse the months and choose your time zone. Free, with no registration.
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Biorhythm Calculator
The chart represents symbolic cycles of 23, 28 and 33 days from birth.
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Relationship synastry
Compare two birth charts: affinities, communication and points of friction between their planets.
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Your personal transits
See which planets activate your birth chart and their approximate active periods.
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Your solar return
Calculate the Sun’s return to its birth position and explore the themes of your new annual cycle.
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Composite Relationship Chart
A chart for the bond you create together: its tone, support and tensions.
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Planetary Hours
The Sun’s rhythm in your location, divided among seven traditional planets.
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Your Astrology World Map
Explore your birth’s planetary lines and their correspondences near a city.
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Retrograde Calendar
See which planets are retrograde and the dates of each change throughout the year.
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Lunar Return
The Moon’s next return to its natal position: a chart for your new lunar cycle.
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Secondary Progressions
One day for each year of life. Explore the symbolic movement of your Sun, Moon and personal planets.
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Your Year’s Theme · Profections
Explore your ages and the house, sign and ruler of each birthday-to-birthday period.
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Eclipses in Your Chart
Explore solar and lunar eclipses and their contacts with your birth chart.
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Your Four Pillars · BaZi
Year, month, day and hour: explore your Chinese Four Pillars chart.
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Compare Dates with Astrology
Compare two to five moments for a meeting, presentation or creative project.
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The Chart of Your Question
Ask about a relationship, a job application or a professional project. Explore its horary chart.
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Your Lunar Nakshatra
Discover your birth lunar mansion, its symbol and the nuances of its pada.
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Your Saturn Return
Explore your return dates, repeated crossings and the theme of this astrological stage.
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Nine Star Ki
Your natal number and nine stages of your yearly cycle, on an explorable board.
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Your draconic chart
Compare your tropical positions with those measured from the north lunar node. Explore each planet and discover what changes and what stays the same.
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The sky at your birth
Explore the stars and planets above your birth horizon. Rotate the map, explore its constellations and download a keepsake of that moment.
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The Wheel of the Year
Explore eight celebrations of the seasonal cycle. Choose a year and hemisphere, check their dates and find a symbolic gesture for each stage.
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Your Human Design
Explore your type, profile and network of centers, gates and channels. A symbolic map calculated from your birth, with clear explanations of each part.
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Your Life Chapters · Zodiacal Releasing
Explore a timeline of chapters and subchapters from the Lot of Spirit. View their dates and symbolic themes for projects and life direction.
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Your Vedic chapters · Dashas
Explore your planetary periods, current subperiod and next transition.
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The Venus rose · Your eight-year cycle
Discover the pattern Venus traces around Earth and explore its meetings with the Sun.
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Daily Panchanga · Your Vedic day
Five elements of the Vedic calendar, with times for your location.
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Your Navamsa chart · The D9 map
Explore your Vedic divisional chart beside the sidereal birth chart.
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Fixed stars in your birth chart
Discover zodiacal contacts between selected stars and your natal planets. Explore a clear map, exact distances and their symbolic reading.
OpenAstrology studies the position of the heavenly bodies at the moment of your birth to draw a profile and cycle indicators. This Tarotoui hub focuses on astrology tools only: birth chart, ascendant, moon sign, sun sign, zodiac compatibility, lunar calendar and biorhythms.
What is astrology?
Western astrology comes from the Babylonian tradition of the second millennium BCE, transmitted through Hellenistic Greece. It distinguishes the sun sign, linked to the Sun's position, the ascendant, calculated from birth time and place, and the moon sign, linked to the Moon's position. These elements are read together to understand temperament, personal cycles and relationship dynamics.
How does a calculation unfold?
For a complete birth chart, you enter your date, precise time and place of birth. The calculation places the planets in the signs and astrological houses. The ascendant requires reliable birth time because it changes quickly during the day. The sun sign, moon sign, compatibility, lunar calendar and biorhythm tools use the data needed for each reading.
Getting the most out of astrology
Do not reduce your profile to one sign: a full birth chart gives a more nuanced reading. Check your time of birth on an official record when possible, especially for the ascendant. Use zodiac compatibility as a reflection aid, not as a verdict. The lunar calendar and biorhythms can help you observe rhythms without replacing personal judgment.
Frequently asked questions
Why is the time of birth important?
Because the ascendant and astrological houses depend directly on birth time and place. An approximate time can change the interpretation.
What is the difference between sun sign, moon sign and ascendant?
The sun sign describes the main axis of identity, the moon sign speaks more about sensitivity and emotional needs, and the ascendant colors the way you meet the world.
Is zodiac compatibility enough to judge a relationship?
No. It highlights possible affinities and tensions, but a relationship also depends on communication, context and each person's choices.
What are biorhythms?
Biorhythms describe three indicative cycles, physical, emotional and intellectual, calculated from the date of birth. They are offered as a symbolic observation tool.