The twelve houses in astrology, and what they rule

If you have only ever read your sun sign, the houses are where your chart starts to feel personal. Two people born on the same day share most of their signs, but if they were born a few hours apart, their houses will be completely different. You can calculate your birth chart and follow along with your own wheel as you read.

A sign is a fixed slice of the sky. The zodiac is a band of twelve signs, each thirty degrees wide, running along the path the Sun appears to take through the year. When we say Venus is in Taurus, we mean Venus was sitting in that slice of sky when you were born. The sign colours the planet: Venus in Taurus loves slowly and loyally, Venus in Gemini flirts by text and changes its mind.

A house is a slice of your local sky, measured from where you were standing at the moment you were born. The eastern horizon at that moment marks the start of the first house, which is why it is called the ascendant or rising sign. The houses then run round the wheel from there.

So the sign is the costume and the house is the stage. Mars in Aries in the tenth house is a fierce, impatient drive, and it plays out at work and in your public reputation. Put the same Mars in the fourth house and that fire comes out at home, perhaps in rows over the washing up, perhaps in the energy you pour into renovating a flat.

Each house also has a natural sign, the sign that would sit there if the wheel began at Aries. That pairing gives each house its flavour.

• First house: you, as you arrive. Your body, your face, your first impression, the way you walk into a room. Planets here are visible to everyone. Natural sign: Aries.
• Second house: what you own and what you value. Money, possessions, your sense of self-worth, and what makes you feel secure. Natural sign: Taurus.
• Third house: your daily mind. Talking, writing, short journeys, siblings, neighbours, and the way you learn things. This is the group chat and the walk to the shop. Natural sign: Gemini.
• Fourth house: roots. Home, family, your private life and the past you come from. It sits at the very bottom of the chart, the part of you no one sees from the street. Natural sign: Cancer.
• Fifth house: joy. Romance, play, creativity, hobbies, children and anything you do purely because it lights you up. Natural sign: Leo.
• Sixth house: the working week. Routines, health habits, chores, colleagues and the jobs you do day to day. This is the house of the to-do list. Natural sign: Virgo.
• Seventh house: the other person. Partnerships of every kind, from marriage to business partners to your closest rivals. Its starting line is the descendant, directly opposite your rising sign. Natural sign: Libra.
• Eighth house: what you share. Intimacy, joint money, debts, inheritance, and the things that change you so deeply you never quite go back. Natural sign: Scorpio.
• Ninth house: the big picture. Travel, study, belief, philosophy, and the urge to understand why things are the way they are. Natural sign: Sagittarius.
• Tenth house: your public life. Career, ambition, status and reputation. Its starting line, the midheaven, is the highest point of the chart. Natural sign: Capricorn.
• Eleventh house: your people. Friends, groups, communities, causes, and your hopes for the future. Natural sign: Aquarius.
• Twelfth house: what happens offstage. Rest, solitude, dreams, secrets, and the habits you only notice when they trip you up. Planets here work quietly but powerfully. Natural sign: Pisces.

The houses fall into three groups, and knowing them helps you weigh a chart quickly.

The angular houses are the first, fourth, seventh and tenth. They begin at the four angles of the chart: the rising sign, the bottom of the sky, the descendant and the midheaven. Planets here are loud. They show up in your personality, your home, your relationships and your career, and other people notice them.

The succedent houses are the second, fifth, eighth and eleventh. They follow the angles and deal with what you build and keep: money, pleasure, shared resources and friendships.

The cadent houses are the third, sixth, ninth and twelfth. They are about learning, adjusting and preparing. Planets here do a lot of work behind the scenes, which is why a person with a crowded sixth or twelfth house can be far more capable than they appear.

Ten planets cannot fill twelve houses, so everyone has empty ones. An empty house is not a missing part of your life. It simply means that area runs smoothly without needing much attention. Look at the sign on its starting line, called the cusp, and the planet that rules that sign: that tells you how the house behaves.

A crowded house, three or more planets together, is called a stellium. It is where your life keeps returning. A stellium in the fifth often belongs to someone who has to make things, perform or fall in love to feel alive. A stellium in the eleventh tends to belong to the person who organises the group holiday and keeps everyone talking.

There is more than one way to cut the sky into houses, and our birth chart calculator offers the two most widely used.

Placidus is the default. It divides the sky by time, so houses come out in different sizes, and a house can begin partway through a sign. It is the system most modern astrologers grew up with, and it is precise about the angles.

Whole Sign is the older system. Your rising sign becomes the whole of the first house, the next sign the whole of the second, and so on. Every house is exactly one sign. It is clean and easy to read, and many astrologers prefer it for that reason.

If a planet changes house when you switch systems, read both houses. The planet usually works at the meeting point of the two: Venus moving from the tenth to the eleventh might mean love that grows out of work friendships.

Signs move slowly. The houses move fast. Because the horizon turns a full circle in a day, the rising sign changes roughly every two hours, and every house shifts with it. An hour's difference in birth time can move a planet from one house to the next.

That is why the calculator asks for a time and a place. The planet positions are worked out from real astronomical data, so the signs are right to the degree, and with an accurate time the houses are too. If you are not sure of your time, read what your chart can tell you without a birth time, then look up your rising sign once you have it.

Start with three things. Find your rising sign, because it sets the whole wheel. Find the house your Sun sits in, because that is where you most want to shine. Then find your busiest house, because that is where life keeps sending you back. Read the planet, then the sign, then the house, and say it as a sentence: "My Moon in Cancer in the tenth house needs to feel cared for at work."

You will be surprised how much of yourself you recognise. Calculate your birth chart and see where your houses fall.