Birth chart guidesReading a chart
How to read a birth chart, step by step
By the Hourwyn team
Read a birth chart in six passes: check the birth data, find the Big Three (Sun, Moon and rising signs), weigh the balance of elements, place each planet by sign and house, read the tightest aspects, then note which themes repeat. Astrologers treat repetition as the message of a chart: a theme that shows up three times counts for more than one striking placement.
First, how the wheel is laid out
The wheel is a picture of the sky at birth. The Ascendant is on the left, at nine o'clock, and the houses are counted counterclockwise from it. The horizontal line is the horizon: planets drawn above it were up in the sky, and planets below it were out of sight. The top of the wheel is the Midheaven, the part of the zodiac that was highest in the sky.
1. Check the birth data
Before reading anything, confirm the date, the time and the city, and note how sure the time is. With no time, skip the houses and the rising sign. With a rough time, read the houses loosely. See how exact a birth time needs to be.
2. Find the Big Three
Start with the signs of the Sun, the Moon and the Ascendant. Astrologers read them as identity, emotional needs and outward manner. The guide to the Big Three covers each.
3. Weigh the elements and modes
Each sign belongs to one of four elements and one of three modes. Count where the planets fall. A chart heavy in one element and empty in another is read as a strong lean in temperament.
| Cardinal (starts) | Fixed (holds) | Mutable (adapts) | |
|---|---|---|---|
| Fire | Aries | Leo | Sagittarius |
| Earth | Capricorn | Taurus | Virgo |
| Air | Libra | Aquarius | Gemini |
| Water | Cancer | Scorpio | Pisces |
4. Place each planet by sign and house
Take the planets one at a time. The planet is the subject, the sign is the style, and the house is the area of life.
| Planet | Stands for |
|---|---|
| Sun | Identity, will, purpose |
| Moon | Feelings, needs, habits |
| Mercury | Thinking, speech, learning |
| Venus | Affection, taste, what you value |
| Mars | Drive, anger, how you go after things |
| Jupiter | Growth, belief, generosity |
| Saturn | Limits, discipline, responsibility |
| Uranus, Neptune, Pluto | Slow planets shared by a generation. Their house matters more than their sign. |
Then find the chart ruler: the planet that rules the rising sign. Astrologers give its sign and house extra weight.
5. Read the tightest aspects
Sort the aspects by orb and start with the closest three or four, above all those that involve the Sun, the Moon or the Ascendant. A square with a 1° orb outweighs a trine at 6°.
6. Look for what repeats
One placement proves little. If a chart has the Moon in Capricorn, Saturn in the fourth house and a Moon to Saturn square, the same theme has come up three times, and an astrologer would build the interpretation around it.
Three common mistakes
- Reading one placement in isolation, as if Venus in Scorpio meant the same in every chart.
- Trusting the houses when the birth time is a guess.
- Treating the chart as a forecast. A chart describes themes. It does not say what will happen.
Common questions
What should I look at first in a birth chart?
The signs of the Sun, the Moon and the Ascendant, known as the Big Three. Then the planets closest to the four angles and the tightest aspects.
What do the symbols on the wheel mean?
Each planet and each sign has a glyph, a small symbol. Our chart also writes every placement in words in a table beside the wheel, so you do not need to learn the glyphs.
What does retrograde mean in a birth chart?
The planet appeared to be moving backward through the zodiac, as seen from Earth, when you were born. It is an effect of the two planets' orbits. Astrologers read a retrograde planet as working inwardly.
Can I read my own birth chart?
Yes. The steps above are the ones astrologers follow. The hard part is the last one: weighing many placements against each other instead of reading each alone.
Have your chart written up
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Sources
- What's the difference between astrology and astronomy?. NASA Space Place.
The guides are written by Hourwyn with the help of AI tools. Astronomical and historical facts are checked against the sources listed under each guide. Astrology is described as a tradition and offered for entertainment. Nothing here is medical, financial, legal or psychological advice.