How to Read a Birth Chart: A Beginner's Guide
A birth chart is not a verdict on you. It is a map of the sky in your first minute, and a map is read one step at a time.
Most people know one sign about themselves: “I’m a Libra.” That is where the sun stood on their birthday, and it is about as much as knowing a city by its railway station.
The birth chart, also called the natal chart, shows the whole sky at the moment you were born: the sun, the moon and eight planets, each in a sign, each in a house, joined by lines. My grandmother read cups, not stars. Astrology I taught myself later, and to this day I read a chart the way I read a cup: the whole first, the details after.
Here is what you need to have one calculated, what the drawing shows, and how to read it without getting lost in the first circle.
What a birth chart is
Imagine someone had photographed the sky from your birthplace at the moment of your birth, all the way round, including the part below the horizon. The birth chart is that picture drawn onto a circle. Everything an astrologer later says about a year, a month or a relationship is measured back against this one drawing.
The calculation is astronomy. Where the sun stands on 3 October can be measured, and two programs will give the same result. The interpretation is something else. It is a tradition more than two thousand years old, not a science. I say this at the start because charts are often treated as if they contained a finding. What they contain is a disposition, and there are many ways to live with it.
What you need to calculate a birth chart
Three pieces of information, no more.
- Your date of birth. Day, month, year. This gives the signs of all the planets.
- Your exact time of birth. To the minute if you can. The ascendant moves into a new sign roughly every two hours and advances one degree about every four minutes. All twelve houses hang on it.
- Your place of birth. The town is enough. The place decides which part of the sky was above the horizon, and which time zone your clock time belongs to.
The birth time is often missing from a short birth certificate. A full or long-form certificate, hospital records or your family are the usual sources, and I describe them in more detail in the article on the rising sign.
A chart used to be calculated by hand, with tables called ephemerides, and it took an afternoon. Today it takes a second. In the FalciDilara app the calculation is free and instant, with zodiac ring, houses, planets and aspect lines.
What you see in a natal chart
At first glance it is a wheel covered in small symbols. There are six things in it, and once you can tell them apart the wheel goes quiet.
The zodiac ring is the outer band. It is divided into twelve equal sections of 30 degrees each, from Aries to Pisces. Every planet sits somewhere on that ring, at 14 degrees of Scorpio for example.
The houses are the twelve fields inside, counted anticlockwise, starting on the left at the ascendant. They stand for areas of life: the second house for what you own, the seventh for partnership, the tenth for career and reputation. More on that in the article on the twelve houses.
The planets are the small glyphs along the ring. Astrology counts the sun and moon among them, although astronomically they are not planets. What each one stands for is in the astrology lexicon.
The aspect lines join planets that stand at a particular angle to each other: 0, 60, 90, 120 or 180 degrees. They show which parts of you talk to each other and which ones argue. How to read them is covered under aspects.
The ascendant is the sign that was rising on the eastern horizon at the moment you were born. In the drawing it sits on the left, at nine o’clock. The midheaven, MC for short, is the point of the zodiac that stood highest at that moment, due south. It stands for what you become in the world: work, reputation, direction.
The three questions: planet, sign, house
Every statement in a chart has three parts. If you remember only one section, make it this one.
The planet says what. Which force in you is meant? Venus is what you love. Mars is your drive. Mercury is how you think and speak.
The sign says how. In what manner does that planet live? Venus in Taurus loves slowly, loyally and with its hands. Venus in Gemini loves with words and needs variety.
The house says where. In which area of your life does it show? Venus in the tenth house brings a love of beauty into the career. Venus in the fourth brings it home.
Three words become a sentence. Mars in Cancer in the sixth house: your drive (Mars) works in a caring and moody way (Cancer), in daily routine and at work (sixth house). That is someone who cooks for colleagues and shuts the door on a bad day. The aspects come in as a fourth part: they tell you who this Mars has dealings with.
How to read a birth chart: an order for beginners
The most common mistake is to start with any planet and look up a meaning for each. After the tenth you have ten notes and no picture. Go like this instead.
- Sun, moon and ascendant. These three carry most of the weight. Read sign and house for each. How they work together is in the article on the sun, moon and rising sign.
- The distribution. Where do the planets crowd? Three or more in one sign or house make a centre of gravity. If nearly all of them are in the upper half, a person lives outwardly; in the lower half, more inwardly. Look also at which element dominates and which is missing.
- Mercury, Venus and Mars. Thinking, loving, wanting. These are the planets you recognise at once in daily life.
- Jupiter and Saturn. Where things come easily and where you are tested. Here the house matters more than the sign.
- The tightest aspects. Not every line, only the two or three closest to the exact angle, above all if the sun or moon is involved.
- Uranus, Neptune and Pluto. They stay in one sign for many years, so you share their sign with everyone born around the same time. What makes them personal is the house, and a close aspect to the sun or moon.
Then put the page down and say in three sentences what you saw. If you can, you have read the chart. If you cannot, you have copied it out.
A chart shows what you are working with. What you build from it is not written there.
A birth chart without a birth time
Many people do not know their time of birth. The chart is not worthless then, only smaller.
Without a time there is no ascendant, no midheaven and no houses. The third question, the where, stays open. What remains is a great deal: the signs of the sun, Mercury, Venus, Mars and all the slower planets, and almost all the aspects between them, because these planets hardly move in a day.
Be careful with the moon. It changes sign about every two and a half days and covers twelve to fifteen degrees in a single day. If it changed sign on your birthday, two moon signs are possible. Read both descriptions. You usually know within a minute which one is yours. Aspects to the moon are also only approximate without a time.
In rare cases the same is true of the sun: if you were born on a day when it changes sign, you need the time to be sure of your sun sign.
Common misunderstandings
“I’m a Leo, so that’s how I am.” You have a sun in Leo. You also have a moon, an ascendant and eight more planets, and often most of them are in other signs. People who do not recognise themselves in their sun sign usually have a moon or ascendant that speaks louder.
“A difficult chart means a difficult life.” There are no good and bad charts. Saturn in the seventh house does not mean you stay alone. It means you take relationships seriously and take your time. Tension in a chart is often what gets a person moving.
“Empty houses are empty areas of life.” There are ten planets and twelve houses. Some are always empty, in everyone’s chart.
“The chart says what will happen.” It describes a disposition, not a script. Two people born in the same minute in the same hospital have the same chart and lead two different lives.
Frequently asked questions
Can I calculate my birth chart for free?
Yes. The calculation is pure arithmetic and is free in the FalciDilara app: you enter date, time and place and see the drawing at once, with houses, planets and aspect lines. A written interpretation is available if you want one.
How exact does my birth time need to be?
As exact as you can get it. Four minutes move the ascendant by about one degree, two hours usually by a whole sign. Something like “just after noon” is enough for the planets, but too rough for the houses.
What is the difference between a birth chart and a horoscope?
The birth chart is the drawing of your birth moment and never changes. A daily or weekly horoscope describes how today’s sky relates to a sign. The more it knows about your chart, your moon and ascendant included, the more personal it becomes.
Does my natal chart change over time?
No, the chart stays as it is. What changes is the sky above you: the moving planets keep forming new angles to your birth planets. Astrologers call these transits, and readings for a particular year are built on them.
Why is the ascendant on the left and not at the top?
Because the chart shows the sky as you see it facing south: east is on the left, west on the right. What is rising over the horizon appears on the left. What stands highest is at the top, and what is below the earth is at the bottom.