Birth chart calculator
Start here. Sun, Moon, rising, planets in houses.
Curriculum hub · free guides
This is the map of everything on AstraLink that teaches you to read a birth chart. If you are a beginner, follow the path in order. If you already know your Big Three, jump to the planet, house or aspect you are curious about. Every guide is written for your own chart, not for a textbook one.
The fastest way to learn astrology is to learn it from your own birth chart: find your Big Three (Sun, Moon, rising), then learn the planets (what), signs (how), houses (where) and aspects (how they interact), one placement at a time. This hub maps every guide, glossary term and Academy lesson into that order.
Most people try to learn astrology the way it is usually taught: twelve signs, then ten planets, then twelve houses, then a list of aspects, each with its own page of keywords. It does not stick, because none of it is about you yet.
The method that works is the reverse. Start from your own birth chart, which contains perhaps fifteen placements and a handful of aspects, and learn only those first. Sun in Virgo, Moon in Pisces, Scorpio rising, Venus in Scorpio in the 7th house: four facts, and each one opens a door to a general concept (what Venus does, what the 7th house is, why Scorpio changes both). By the time you have learned your own chart you have learned about a third of astrology, and the rest is pattern recognition.
The path below follows that logic. Every card links to a full guide; the tables give you the reference material in one place.
Sun, Moon and rising sign are where every chart reading starts.
Every learning page on the site, grouped the way you should meet them.
Start here. Sun, Moon, rising, planets in houses.
Sun, Moon and rising signs and how they combine.
What it means, why time matters, all 12 profiles.
The planet steering your chart, and the dispositor chain.
Love style and values; Venus in every sign and house.
A full planet-in-sign reading: love, dating, flags.
Partnership, marriage and the partner you attract.
A full planet-in-house reading: magnetism and shadow.
Tension, T-squares, and how to work with friction.
Three or more planets together, by sign and house.
55 short lessons personalised to your placements.
Learn to spot a void window and plan around it.
Every term in plain English, A to Z.
The long-form walkthrough with a worked example.
Short episodes, starting with the rising sign.
Houses are the where of a chart: the areas of life a planet acts in. They are counted counter-clockwise from the Ascendant, and their sizes depend on the house system (AstraLink defaults to Placidus). Each house also has a natural sign and planet that describe its flavour, which is why the 7th house feels like Libra even when Aries sits on its cusp.
| House | Life area | Natural sign | Questions it answers |
|---|---|---|---|
| 1st | Self, body, appearance, approach | Aries | How do I come across? How do I begin things? |
| 2nd | Money, possessions, values, self-worth | Taurus | How do I earn, spend and value myself? |
| 3rd | Communication, siblings, short trips, learning | Gemini | How do I think, talk and connect locally? |
| 4th | Home, family, roots, private life | Cancer | Where do I come from and where do I feel safe? |
| 5th | Romance, creativity, children, play | Leo | What do I create and how do I flirt? |
| 6th | Work, routine, health habits, service | Virgo | How do I work daily and take care of my body? |
| 7th | Partnership, marriage, open enemies, contracts | Libra | Who do I attract and commit to? |
| 8th | Intimacy, shared resources, crisis, transformation | Scorpio | How do I merge, owe, inherit and let go? |
| 9th | Travel, higher education, belief, publishing | Sagittarius | What do I believe and where do I go to grow? |
| 10th | Career, reputation, public role | Capricorn | What am I known for? |
| 11th | Friends, groups, causes, hopes | Aquarius | Who are my people and what future do I want? |
| 12th | Inner world, solitude, the unconscious, endings | Pisces | What do I hide, heal and surrender? |
Angular houses (1, 4, 7, 10) are the loudest; planets there show up in public. The full guide for each house is being published one at a time, starting with the 7th.
Planets are the what: the functions of the psyche and of life. Astrologers group them by speed. The personal planets (Sun through Mars) describe your individual character; the social planets (Jupiter, Saturn) describe how you meet society; the outer planets (Uranus, Neptune, Pluto) move so slowly that their sign is generational, and only their house and aspects are personal.
| Planet | Function | Rules | Time in a sign |
|---|---|---|---|
| Sun | Identity, vitality, purpose | Leo | About 1 month |
| Moon | Emotion, needs, habit, memory | Cancer | About 2.5 days |
| Mercury | Thinking, speech, learning, trade | Gemini, Virgo | 2–10 weeks |
| Venus | Love, attraction, values, pleasure | Taurus, Libra | About 1 month (up to 4 when retrograde) |
| Mars | Drive, desire, anger, action | Aries (and Scorpio, traditional) | About 6–7 weeks |
| Jupiter | Growth, luck, belief, excess | Sagittarius (and Pisces, traditional) | About 1 year |
| Saturn | Structure, limits, time, maturity | Capricorn (and Aquarius, traditional) | About 2.5 years |
| Uranus | Change, freedom, invention | Aquarius (modern) | About 7 years |
| Neptune | Imagination, faith, dissolution | Pisces (modern) | About 14 years |
| Pluto | Power, transformation, the buried | Scorpio (modern) | 12–30 years |
| Chiron | The wound that becomes a skill | — | 2–8 years |
| North Node | Direction of growth | — | About 1.5 years |
| Black Moon Lilith | The refused, the untamed | — | About 9 months |
See the glossary for Chiron, Black Moon Lilith, the North Node, retrogrades and transits.
Aspects are angles between planets, measured around the 360-degree wheel. They are the how of a chart: whether two functions cooperate, merge or argue. Astrologers allow a tolerance called an orb, usually up to about 8 degrees for the Sun and Moon and 5 to 6 degrees for other planets; the tighter the orb, the stronger the aspect.
| Aspect | Angle | Nature | In one line |
|---|---|---|---|
| Conjunction | 0° | Fusion | Two planets act as one; intense, for better or worse |
| Sextile | 60° | Easy | Opportunity that needs a nudge |
| Square | 90° | Tense | Friction that builds skill; the engine of the chart |
| Trine | 120° | Easy | Talent so natural you may take it for granted |
| Opposition | 180° | Tense | A tug of war, often lived out through other people |
| Quincunx | 150° | Awkward | Two things that do not fit and must be adjusted |
The square guide is the deepest aspect page so far. Chart patterns (T-square, grand trine, yod, stellium) are combinations of these aspects.
Signs are the how: the style a planet takes on. You already know the list. What helps most is to hold two grids in your head. Elements (fire, earth, air, water) describe temperament; modalities (cardinal, fixed, mutable) describe how a sign handles change. Aries is cardinal fire (starts, hot); Taurus is fixed earth (sustains, solid); Gemini is mutable air (adapts, quick), and so on around the wheel. The zodiac dates page has the calendar, and each horoscope sign hub covers a sign's traits in full.
A chart placement is always three things at once: a planet (what), in a sign (how), in a house (where), plus its aspects (with whom). Beginners read them separately and get twelve keywords that contradict each other. The synthesis method reads them as one sentence: Venus (love) in Scorpio (all-or-nothing) in the 7th house (partnership) square Mars (with friction around desire) becomes "you commit intensely, attract intensity, and fight about what you want." Each of the guides on this hub ends with a synthesis paragraph so you can see the method in action, and the AstraLink Academy generates a personalised lesson for every placement in your own chart, 55 lessons of about 95 seconds each. Early-access members get the Academy with their free chart when they join the waitlist.
Start with your own birth chart instead of a textbook. Cast the chart, learn your Sun, Moon and rising signs, find your chart ruler, and then learn the planets, houses and aspects that actually appear in your chart, one at a time. Each placement teaches a general concept. Within a few weeks you will know a third of astrology and be able to read a friend's chart.
Reading your own chart at a basic level, the Big Three, chart ruler, busiest house and tightest aspects, takes a few focused hours with good guides. Reading any chart confidently takes months of practice, mostly spent looking at charts of people you know. Timing techniques such as transits add another layer. The Academy's 55 lessons are designed to be finished in a few weeks.
Read it in layers. First the Big Three: Sun, Moon and Ascendant. Second, the chart ruler and its house. Third, the balance of elements and modalities. Fourth, the tightest aspects, especially to the Sun, Moon and ruler. Fifth, the busiest house or any stellium. Then combine each placement as one sentence: planet (what), sign (how), house (where), aspects (with whom).
The twelve houses are areas of life: 1st self, 2nd money and values, 3rd communication and siblings, 4th home and family, 5th romance and creativity, 6th work and health, 7th partnership, 8th intimacy and shared resources, 9th travel and belief, 10th career, 11th friends and community, 12th the inner world. Angular houses (1, 4, 7, 10) carry the most weight.
Not to start. Your Sun, Mercury, Venus, Mars and the outer planets are fixed by your birth date, and the Moon usually is too. What you lose without a time is the rising sign and the houses, which is roughly the where of the chart. Many people learn on a noon chart and add the time later, after which the houses become the most interesting part.
The vocabulary is large but the grammar is small. There are ten planets, twelve signs, twelve houses and five major aspects, and every chart is a combination of those pieces. The difficulty is synthesis: reading a placement as one sentence rather than a pile of keywords. That skill comes from practice on real charts, which is why learning from your own chart works so well.
Early access · US launch
Cosmic archetype, chart ruler, strengths, karmic lesson and more, written for your exact placements. Join early access for the complete reading, free.
AstraLink content is written by our editorial team, reviewed for astrological accuracy, and refreshed as the sky moves. Interpretations are for reflection and entertainment; they are not medical, legal or financial advice.