How to read your birth chart, step by step
The four ingredients of any chart (planets, signs, houses and aspects), a six-step method to read it and reference tables to check whenever you need them.
5 min read · Updated
The four building blocks of a natal chart
“What, how, where and with whom.”
Every interpretation combines four questions. Planets say which part of you is acting (mind, affection, will). Signs say how it acts. Houses say in which area of life. Aspects say which other parts it talks to, smoothly or with tension.
A phrase like "Venus in Cancer in the 10th house, trine Saturn" reads: your way of loving and valuing (Venus) is protective and emotional (Cancer), shows up in your career and public image (10th house) and is supported by consistency and responsibility (trine Saturn).
- Planet = which psychological function
- Sign = how it expresses itself
- House = in which area of life
- Aspect = how it relates to other planets
How to read your natal chart in 6 steps
From the general to the specific, so you do not get lost in the details.
- 1
Start with the big three
Sun (identity and purpose), Moon (emotions and needs) and rising sign (how you show up and start things). Together they give the basic portrait.
- 2
Check the balance of elements and modalities
Count your planets in fire, earth, air and water, and in cardinal, fixed and mutable signs. What abounds and what is missing defines your temperament.
- 3
Find your chart ruler
It is the planet ruling your rising sign (for example, Mars for Aries rising). Its sign, house and aspects color the whole chart.
- 4
Read the planets by house
Houses with several planets are leading areas of your life. Empty houses are not "bad": they are read through their ruler.
- 5
Interpret the main aspects
Start with the tightest aspects (smallest orb) and those touching the Sun, Moon and ascendant.
- 6
Synthesize
Look for repeating themes. If three indicators point the same way, it is a core trait; if they contradict, they describe an inner tension to integrate.
The planets and what they represent
☉ Sun
- What it represents
- Identity, will, purpose, vitality
- Trip around the zodiac
- 1 year
☽ Moon
- What it represents
- Emotions, needs, habits, the mother
- Trip around the zodiac
- ≈ 27.3 days
☿ Mercury
- What it represents
- Mind, communication, learning
- Trip around the zodiac
- ≈ 1 year (always near the Sun)
♀ Venus
- What it represents
- Love, values, pleasure, beauty, money
- Trip around the zodiac
- ≈ 1 year (always near the Sun)
♂ Mars
- What it represents
- Action, desire, energy, conflict
- Trip around the zodiac
- ≈ 2 years
♃ Jupiter
- What it represents
- Expansion, faith, opportunity, abundance
- Trip around the zodiac
- ≈ 12 years
♄ Saturn
- What it represents
- Structure, limits, responsibility, maturity
- Trip around the zodiac
- ≈ 29.5 years
♅ Uranus
- What it represents
- Sudden change, freedom, originality
- Trip around the zodiac
- ≈ 84 years
♆ Neptune
- What it represents
- Ideals, intuition, spirituality, confusion
- Trip around the zodiac
- ≈ 165 years
♇ Pluto
- What it represents
- Deep transformation, power, regeneration
- Trip around the zodiac
- ≈ 248 years
| Planet | What it represents | Trip around the zodiac |
|---|---|---|
| ☉ Sun | Identity, will, purpose, vitality | 1 year |
| ☽ Moon | Emotions, needs, habits, the mother | ≈ 27.3 days |
| ☿ Mercury | Mind, communication, learning | ≈ 1 year (always near the Sun) |
| ♀ Venus | Love, values, pleasure, beauty, money | ≈ 1 year (always near the Sun) |
| ♂ Mars | Action, desire, energy, conflict | ≈ 2 years |
| ♃ Jupiter | Expansion, faith, opportunity, abundance | ≈ 12 years |
| ♄ Saturn | Structure, limits, responsibility, maturity | ≈ 29.5 years |
| ♅ Uranus | Sudden change, freedom, originality | ≈ 84 years |
| ♆ Neptune | Ideals, intuition, spirituality, confusion | ≈ 165 years |
| ♇ Pluto | Deep transformation, power, regeneration | ≈ 248 years |
Fast planets (Sun, Moon, Mercury, Venus and Mars) describe personal traits; slow ones, especially Uranus, Neptune and Pluto, are shared by a whole generation and matter most by house.
The twelve signs: element, modality and ruler
♈ Aries
- Approximate dates
- Mar 21 – Apr 19
- Element
- Fire
- Modality
- Cardinal
- Ruler
- Mars
♉ Taurus
- Approximate dates
- Apr 20 – May 20
- Element
- Earth
- Modality
- Fixed
- Ruler
- Venus
♊ Gemini
- Approximate dates
- May 21 – Jun 20
- Element
- Air
- Modality
- Mutable
- Ruler
- Mercury
♋ Cancer
- Approximate dates
- Jun 21 – Jul 22
- Element
- Water
- Modality
- Cardinal
- Ruler
- Moon
♌ Leo
- Approximate dates
- Jul 23 – Aug 22
- Element
- Fire
- Modality
- Fixed
- Ruler
- Sun
♍ Virgo
- Approximate dates
- Aug 23 – Sep 22
- Element
- Earth
- Modality
- Mutable
- Ruler
- Mercury
♎ Libra
- Approximate dates
- Sep 23 – Oct 22
- Element
- Air
- Modality
- Cardinal
- Ruler
- Venus
♏ Scorpio
- Approximate dates
- Oct 23 – Nov 21
- Element
- Water
- Modality
- Fixed
- Ruler
- Mars
♐ Sagittarius
- Approximate dates
- Nov 22 – Dec 21
- Element
- Fire
- Modality
- Mutable
- Ruler
- Jupiter
♑ Capricorn
- Approximate dates
- Dec 22 – Jan 19
- Element
- Earth
- Modality
- Cardinal
- Ruler
- Saturn
♒ Aquarius
- Approximate dates
- Jan 20 – Feb 18
- Element
- Air
- Modality
- Fixed
- Ruler
- Saturn
♓ Pisces
- Approximate dates
- Feb 19 – Mar 20
- Element
- Water
- Modality
- Mutable
- Ruler
- Jupiter
| Sign | Approximate dates | Element | Modality | Ruler |
|---|---|---|---|---|
| ♈ Aries | Mar 21 – Apr 19 | Fire | Cardinal | Mars |
| ♉ Taurus | Apr 20 – May 20 | Earth | Fixed | Venus |
| ♊ Gemini | May 21 – Jun 20 | Air | Mutable | Mercury |
| ♋ Cancer | Jun 21 – Jul 22 | Water | Cardinal | Moon |
| ♌ Leo | Jul 23 – Aug 22 | Fire | Fixed | Sun |
| ♍ Virgo | Aug 23 – Sep 22 | Earth | Mutable | Mercury |
| ♎ Libra | Sep 23 – Oct 22 | Air | Cardinal | Venus |
| ♏ Scorpio | Oct 23 – Nov 21 | Water | Fixed | Mars |
| ♐ Sagittarius | Nov 22 – Dec 21 | Fire | Mutable | Jupiter |
| ♑ Capricorn | Dec 22 – Jan 19 | Earth | Cardinal | Saturn |
| ♒ Aquarius | Jan 20 – Feb 18 | Air | Fixed | Saturn |
| ♓ Pisces | Feb 19 – Mar 20 | Water | Mutable | Jupiter |
Dates are approximate: the exact day the Sun changes sign varies by year.
The twelve houses and their areas of life
1st house
- Area of life
- Identity, body, character, how you start things (begins at the ascendant)
2nd house
- Area of life
- Personal resources, money, talents, self-worth
3rd house
- Area of life
- Communication, learning, siblings, neighborhood, short trips
4th house
- Area of life
- Home, family, roots, private life (begins at the IC)
5th house
- Area of life
- Creativity, romance, pleasure, children, play
6th house
- Area of life
- Daily work, routines, health, service
7th house
- Area of life
- Partners, spouses, one-to-one relationships (begins at the descendant)
8th house
- Area of life
- Shared resources, intimacy, crises and transformation
9th house
- Area of life
- Philosophy, higher education, long journeys, beliefs
10th house
- Area of life
- Vocation, career, public image, achievements (begins at the midheaven)
11th house
- Area of life
- Friends, groups, community, future plans
12th house
- Area of life
- Unconscious, retreat, spirituality, what stays hidden
| House | Area of life |
|---|---|
| 1st house | Identity, body, character, how you start things (begins at the ascendant) |
| 2nd house | Personal resources, money, talents, self-worth |
| 3rd house | Communication, learning, siblings, neighborhood, short trips |
| 4th house | Home, family, roots, private life (begins at the IC) |
| 5th house | Creativity, romance, pleasure, children, play |
| 6th house | Daily work, routines, health, service |
| 7th house | Partners, spouses, one-to-one relationships (begins at the descendant) |
| 8th house | Shared resources, intimacy, crises and transformation |
| 9th house | Philosophy, higher education, long journeys, beliefs |
| 10th house | Vocation, career, public image, achievements (begins at the midheaven) |
| 11th house | Friends, groups, community, future plans |
| 12th house | Unconscious, retreat, spirituality, what stays hidden |
The major aspects
Conjunction
- Angle
- 0°
- Typical orb
- 8–10°
- Nature
- Fusion: the planets act together and intensify each other
Sextile
- Angle
- 60°
- Typical orb
- 4–6°
- Nature
- Opportunity: easy cooperation that needs initiative
Square
- Angle
- 90°
- Typical orb
- 6–8°
- Nature
- Tension: friction that pushes you to act and grow
Trine
- Angle
- 120°
- Typical orb
- 6–8°
- Nature
- Harmony: natural talent, ease
Opposition
- Angle
- 180°
- Typical orb
- 8–10°
- Nature
- Polarity: balancing two extremes, often through others
Quincunx
- Angle
- 150°
- Typical orb
- 2–3°
- Nature
- Adjustment: two energies that do not understand each other
| Aspect | Angle | Typical orb | Nature |
|---|---|---|---|
| Conjunction | 0° | 8–10° | Fusion: the planets act together and intensify each other |
| Sextile | 60° | 4–6° | Opportunity: easy cooperation that needs initiative |
| Square | 90° | 6–8° | Tension: friction that pushes you to act and grow |
| Trine | 120° | 6–8° | Harmony: natural talent, ease |
| Opposition | 180° | 8–10° | Polarity: balancing two extremes, often through others |
| Quincunx | 150° | 2–3° | Adjustment: two energies that do not understand each other |
Orbs vary by school and are usually widened for the Sun and Moon.
Reading a natal chart: FAQ
Common questions when you start reading a chart.
The big three (Sun, Moon and rising sign), the chart ruler and the tightest aspects. That already gives a fairly accurate portrait.
Nothing negative. It is simply not an area of special focus. It is read through the sign on its cusp and the position of its ruling planet.
No. They signal tension, but that tension creates motivation and growth. Many high achievers have charts with strong squares.
A planet that, seen from Earth, appeared to move backwards when you were born. It is usually read as a more introspective energy, or one that develops in a less conventional way.
Yes. On Aspectados the AI receives your exact positions and explains each piece following this same method, answering your questions about any planet, house or aspect.
Apply the method to your own chart
Calculate your natal chart for free and ask the AI to walk you through it: big three, elements, houses and aspects.
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