Online Astrology
Free astrological calculations: natal chart, ascendant, sun and moon signs, zodiac compatibility, lunar calendar, biorhythms and horoscopes from six cultures.
Cosmic Daily Reading
Select your sign, a day and the area you want to explore. You can add a name to accompany the question. The application generates...
Natal Chart
Enter your birth date, time and city. Historical time offsets are applied automatically to calculate the Sun, Moon and Ascendant ...
Ascendant
Calculate your ascendant from your birth date, time and city and explore its description, traits and advice.
Moon Sign
Moon Sign: Enter the requested details and view the tool’s result. Free, with no registration.
Sun Sign
Sun Sign: Enter the requested details and view the tool’s result. Free, with no registration.
Zodiac compatibility
Compare two signs in love, friendship and work. Explore symbolic affinity, examples and questions for conversation. Free, with no...
Lunar calendar
Check Moon phases, illumination and upcoming new and full Moons. Browse the months and choose your time zone. Free, with no regis...
Biorhythm
The chart represents symbolic cycles of 23, 28 and 33 days from birth.
Daily Horoscope
Select a zodiac sign and one of the available days. The application displays an AI reading organised into areas of life.
Chinese Horoscope
Discover your Chinese year’s animal and element, then explore their imagery through examples for your own reading.
Mayan Horoscope
Find your Tzolk’in day’s number and name, accompanied by a symbolic reading with its own example and reflection question.
Egyptian Horoscope
Explore the deity associated with your date in this version and use its image to open a personal reading, with an example and a q...
Japanese Horoscope
Explore your Japanese eto animal together with its element and polarity, using images and questions to consider their nuances.
Tibetan Horoscope
Find your animal, element, polarity and annual Mewa, then explore the reading through examples that leave room for reflection.
Relationship synastry
Compare two birth charts: affinities, communication and points of friction between their planets.
Your personal transits
See which planets activate your birth chart and their approximate active periods.
Your solar return
Calculate the Sun’s return to its birth position and explore the themes of your new annual cycle.
Composite Relationship Chart
A chart for the bond you create together: its tone, support and tensions.
Planetary Hours
The Sun’s rhythm in your location, divided among seven traditional planets.
Your Astrology World Map
Explore your birth’s planetary lines and their correspondences near a city.
Retrograde Calendar
See which planets are retrograde and the dates of each change throughout the year.
Lunar Return
The Moon’s next return to its natal position: a chart for your new lunar cycle.
Secondary Progressions
One day for each year of life. Explore the symbolic movement of your Sun, Moon and personal planets.
Your Year’s Theme · Profections
Explore your ages and the house, sign and ruler of each birthday-to-birthday period.
Eclipses in Your Chart
Explore solar and lunar eclipses and their contacts with your birth chart.
Your Four Pillars · BaZi
Year, month, day and hour: explore your Chinese Four Pillars chart.
Compare Dates with Astrology
Compare two to five moments for a meeting, presentation or creative project.
The Chart of Your Question
Ask about a relationship, a job application or a professional project. Explore its horary chart.
Your Lunar Nakshatra
Discover your birth lunar mansion, its symbol and the nuances of its pada.
Your Saturn Return
Explore your return dates, repeated crossings and the theme of this astrological stage.
Nine Star Ki
Your natal number and nine stages of your yearly cycle, on an explorable board.
Your draconic chart
Compare your tropical positions with those measured from the north lunar node. Explore each planet and discover what changes and ...
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 tha...
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...
Your Human Design
Explore your type, profile and network of centers, gates and channels. A symbolic map calculated from your birth, with clear expl...
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...
Your Vedic chapters · Dashas
Explore your planetary periods, current subperiod and next transition.
The Venus rose · Your eight-year cycle
Discover the pattern Venus traces around Earth and explore its meetings with the Sun.
Daily Panchanga · Your Vedic day
Five elements of the Vedic calendar, with times for your location.
Your Navamsa chart · The D9 map
Explore your Vedic divisional chart beside the sidereal birth chart.
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...
Astrology was born in Mesopotamia over four thousand years ago as an attempt to read the heavens in search of omens. The system we know today — twelve zodiac signs, ten planets, twelve houses — was formalized in Hellenistic Greece around the 2nd century BC and codified by astronomer Claudius Ptolemy in the Tetrabiblos (2nd century AD), a reference text until the Renaissance.
At Tarotsim we offer the essential astrological calculations — natal chart, ascendant, moon and sun signs — and six cultural horoscope traditions: Western, Chinese, Mayan, Egyptian, Japanese, and Tibetan. All free, with AI interpretation.
The fundamental calculations
- Natal Chart — snapshot of the sky at your exact moment of birth.
- Ascendant — the sign rising on the eastern horizon at your birth. The "social mask".
- Moon Sign — Moon position. Governs the emotional world.
- Sun Sign — the "sign" everyone knows. Conscious essence.
- Compatibility — synastry between two charts.
The six cultural horoscopes
Beyond the Greco-Roman tradition, we offer the Western daily horoscope, Chinese horoscope (12 animals + 5 elements over 60 years), Mayan horoscope (Tzolkin of 260 days), Egyptian, Japanese (blood types), and Tibetan horoscope.
Why the ascendant matters
Many know their sun sign without knowing their ascendant. But in many currents of Western astrology, the ascendant is as important as the Sun. While the sun sign is the internal essence, the ascendant is the mask you show others — your way of walking in the world. To calculate it, you need the exact hour of birth.
Frequently asked questions
Why are there 12 signs?
Because the Moon has approximately 12 lunar cycles per solar year. The Babylonians — who systematized the zodiac — divided the sky into 12 constellations to track this correspondence.
Does Ophiuchus exist as a sign?
As a constellation, yes — astronomy recognizes 13 constellations on the ecliptic. As an astrological sign, no: Western astrology works with the solar year divided into 12 equal segments of 30°.
Does the natal chart need exact birth time?
Ideally yes. Without time, the chart can be calculated for "midday" as an approximation, but the ascendant and houses become imprecise.
