Reading Your Natal Chart Step by Step: A Simple Method for Beginners

What is a natal chart?

A natal chart (also called a birth chart or birth horoscope) is a map of the sky drawn up for the exact moment and place of your birth. It shows, on a circle, the position of the ten heavenly bodies of astrology (the Sun, the Moon and eight others, from Mercury to Pluto) in the twelve signs, as well as the houses, the aspects and the angles, including the ascendant. Astrologers sometimes add other points, such as the lunar nodes or the asteroid Chiron.

The principle is a very old one (it has been practiced for over two thousand years), but its interpretation remains a matter of convention and of school choice.

The data to gather

• The date of birth.
• The time of birth, as precise as possible: it determines the ascendant and the houses (see the page on the ascendant to find it, especially on the full birth certificate).
• The place of birth: the city is enough; a difference of a few kilometers matters little.

If the time is unknown, a chart is still possible, but without an ascendant or houses. The Moon, which advances about 13 degrees a day, may also change sign during the day: the software will show this.

To draw up the chart, use software or a calculation website. Check two settings: the zodiac must be tropical (the one used by Western horoscopes) and the house system chosen (for example Placidus or whole sign). This does not matter much when you are starting, but note them so you can compare later.

How is the wheel drawn?

The chart is presented in the form of a wheel. By convention, the ascendant is on the left (at “nine o'clock”), the descendant on the right, the Midheaven at the top and the Imum Coeli at the bottom. The houses are numbered counterclockwise, starting from the ascendant. What is at the top of the wheel (houses VII to XII) was above the horizon at birth. Heavenly bodies are placed using symbols, and aspects are shown with lines.

To read a wheel, remember the astrologers' formula: the planet says what (the function), the sign says how (the style), the house says where (the area of life), and the aspect says with whom (the relationship between two functions). Example: “Venus in Libra in the 5th house” can be read as: “tastes and relationships (Venus) are lived with elegance and a sense of balance (Libra) in the area of creativity and pleasure (5th house)”.

An eight-step method

1. Look at the whole: is there one element or modality that stands out? Fire, earth, air, water? Cardinal, fixed, mutable? Are the planets grouped together or spread out?
2. The basic trio: read the sign of the Sun, that of the Moon and the ascendant, each with its house.
3. The ruler of the ascendant: find the planet that governs the ascending sign, then its sign and house.
4. Mercury, Venus, Mars: communication, tastes, energy. Sign, house.
5. Jupiter and Saturn: growth and structure.
6. Uranus, Neptune, Pluto: mainly through their aspects, since they are shared by an entire generation.
7. Tight aspects (a gap of less than 3 degrees) with the Sun, the Moon, the ascendant or the Midheaven.
8. The synthesis: summarise in three sentences what comes back again and again. Note three questions the chart inspires in you.

For each step, do not look for “the” right interpretation: consider two or three possible readings and keep the ones that really speak to you.

An imaginary example

Let us imagine a fictional person, with the Sun in Pisces, the Moon in Gemini and a Leo ascendant. A “basic” reading would say: the Sun in Pisces suggests an identity turned toward imagination and empathy; the Moon in Gemini an emotional need to talk, move and learn; the Leo ascendant a warm and expressive way of presenting oneself. One can see in this a tension between a dreamy core and a more visible self-presentation, and ask oneself: “where do I feel I am playing a role?”. That is the principle: the chart provides questions, not answers. It does not predict this person's life.

Pitfalls of reading

The Barnum effect. In 1948, the psychologist Bertram Forer gave 39 students a “personality profile” supposedly written for each of them; in fact it was identical for everyone, made up of vague sentences taken from an astrology book. The students rated it on average 4.3 out of 5 for accuracy. This is called the Forer effect or the Barnum effect: a vague, flattering and plausible text always seems personal.

Confirmation bias. We remember what fits and forget what does not.

Automatic readings. Many online chart reports are assembled automatically from pre-written sentences.

The Carlson test (1985). In a double-blind study published in the journal Nature, the physicist Shawn Carlson asked some 28 well-known astrologers, selected with the help of an astrologers' association, to match natal charts with psychological profiles. They succeeded about as often as chance would predict, one in three. The astrologers had nonetheless predicted a success rate above 50% before the test. See the history and limits of astrology.

How to use it in a healthy way

If you enjoy the language of astrology, use the chart as a prompt for self-reflection: a bit like a playful personality quiz or a deck of cards. Keep these safeguards in mind: do not make an important decision (health, money, separation, work) on the strength of a chart; be wary of anyone who announces events; do not pay for readings that promise a result. If you are in distress of any kind, consult a health professional. The chart is a mirror, not a diagnosis.

An honest view of what this reading can tell you

The natal chart rests on a rich tradition with no scientific validation: no controlled study has shown that it describes or predicts a character or a destiny. This does not stop it from being a fascinating cultural object, nor a basis for personal reflection for those who wish to use it. You are free to find meaning in it, as long as you know what it is.

Frequently asked questions

Also read

The meanings mentioned belong to tradition and symbolism. They are neither promises of results nor medical advice. Back to Guide to astrology basics.