Free Birth Chart Calculator
Your free birth chart, calculated from the exact moment you were born
Your rising sign reveals more about you than your sun sign.
Generate your natal chart in a minute — every planetary placement, your house positions, and a personalised reading. No sign-up required to see your chart.
Calculate my free birth chart →No sign-up to view · Takes about a minute · Real chart math
A real natal chart calculator
A birth chart — also called a natal chart — is a map of the sky at the exact moment you were born. It shows where every planet sat across the 12 zodiac signs and 12 houses, a cosmic fingerprint that's unique to you.
Most people only know their Sun sign. Your full chart goes deeper: your emotional nature (Moon), how others first perceive you (Rising), how you think (Mercury), how you love (Venus), and more.
- ✦Sun, Moon & Rising sign
- ✦All 10 planetary placements
- ✦Your 12 house positions
- ✦Major aspects & patterns
- ✦A personalised chart interpretation
- ✦Daily transit readings (with a free account)
What is a birth chart?
A birth chart — also known as a natal chart — is a circular map of the positions of the Sun, Moon, and planets at the precise moment and place of your birth. Think of it as a freeze-frame of the solar system the instant you arrived.
Unlike your Sun sign, which only reflects the zodiac sign the Sun was in during your birth month, your full chart is uniquely yours. Two people born the same day in different cities can have very different charts — the Rising sign alone changes every two hours, which is why birth time matters so much.
How to read your natal chart
Your chart is divided into 12 houses, each governing an area of life — identity, money, relationships, career, spirituality. The planets are the characters; the signs describe how they behave; the houses show where they play out.
The angles between planets, called aspects, show where energy flows easily (trines, sextiles) and where there's tension and growth (squares, oppositions). A chart with many squares isn't a bad chart — it often signals real drive and capacity for change.
Why your Rising sign matters more than you think
Most people identify with their Sun sign, but the Rising sign (Ascendant) determines your entire house structure and colours every part of your chart. It shapes how strangers first perceive you — many people feel more recognised by their Rising sign than their Sun.
Because it changes roughly every two hours, the Rising sign needs an accurate birth time. Aura computes it from your exact birth moment, so the reading reflects your real chart rather than a generic sun-sign template.
What does a free birth chart include?
Aura's free chart includes your complete planetary placements across all 12 signs and houses, your Big Three (Sun, Moon, Rising), major aspect patterns, and a personalised interpretation. A free account adds house-by-house readings and a daily transit feed personalised to your chart.
Frequently asked questions
What do I need to calculate my birth chart?+
Your date of birth, your time of birth (as precise as possible), and the city where you were born. If you don't know your exact birth time, we can still calculate your Sun, Moon, and all planetary sign placements — but your Rising sign and house positions need an accurate time. Birth certificates usually list it.
What is the difference between a Sun sign and a Rising sign?+
Your Sun sign is set by which zodiac sign the Sun was in on your birthday and changes about once a month. Your Rising sign (Ascendant) is the sign rising on the eastern horizon at the exact moment you were born and changes roughly every two hours. Many people find their Rising sign describes them more accurately.
How accurate is Aura's birth chart calculator?+
Aura computes planetary positions from your exact birth date, time, and location using established astronomical algorithms — the same math professional chart software relies on — rather than the generic sun-sign lookups most free tools use.
What is a natal chart reading?+
A natal chart reading interprets the symbolism in your chart — what each placement, house, and aspect means for your personality, relationships, and life patterns. Aura provides a personalised reading based on your chart, with deeper interpretations available to members.
Is my birth data kept private?+
Yes. Your birth date, time, and location are used only to calculate your chart and personalise your experience. We never sell or share your individual birth data.
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