What is a birth chart?
A birth chart (also called a natal chart) is a map of the sky at the exact moment and place you were born. It plots the Sun, Moon, and planets across the twelve zodiac signs and twelve houses, along with the aspects — the angles planets make to one another. Together these reveal the patterns of your personality, your strengths and challenges, and the themes that recur throughout your life.
Our free birth chart calculator does the astronomy for you: enter your birth details above and STARFIELDS computes your complete natal chart in seconds, with no account required.
How to calculate your free birth chart
- Enter your birth date. This places every planet in its zodiac sign.
- Add your birth time (optional). An exact time unlocks your Rising sign (Ascendant), Midheaven, and the houses your planets fall in — the most personal layer of the chart.
- Choose your birth place. Start typing a city and pick it from the list.
- Read your chart. Explore the wheel, then click any placement to see what it means.
What your birth chart reveals
Every birth chart is built from a few core ingredients. Tap any placement in your chart to read its meaning, or learn the fundamentals first:
- The planets — the Sun, Moon, and Mercury, Venus, Mars and beyond each govern a different part of life. Browse all the planets, signs, and points.
- The twelve signs — from Aries to Pisces, each colors how a planet expresses itself.
- The houses & angles — including your Ascendant and Midheaven, which show where life themes play out.
- Aspects — the conversations between planets that shape your unique wiring.
New to all of this? Start with our Astrology 101 guide, or read a free sample placement like Sun in Aries or Sun in Leo.
Frequently asked questions
Is the birth chart calculator really free?
Yes. You can calculate your complete natal chart — planets, signs, houses, and aspects — for free, with no account required, and every placement interpretation is free to read in full. Create a free account to save your chart and get personalized daily horoscopes.
What do I need to calculate my birth chart?
Your birth date and birth place are required. Your exact birth time is optional but recommended — it's what determines your Rising sign (Ascendant) and the house placements of your planets. Without a time, we calculate planetary positions using noon.
What does my birth chart show?
Your birth chart is a snapshot of the sky at the moment you were born. It shows where the Sun, Moon, and planets sat across the twelve zodiac signs and houses, and the aspects (angles) between them — the blueprint of your personality, strengths, and life themes.
Do I need my exact birth time?
Not to get started. You'll still see all your planetary placements and sign positions without a time. A precise birth time adds your Ascendant (Rising sign), Midheaven, and accurate house cusps, which make the reading far more personal.
How accurate is this free natal chart?
Very. STARFIELDS uses the same high-precision astronomical ephemeris professional astrologers rely on, calculating every planetary position, house cusp, and aspect to the degree.
Can I read what my placements mean?
Yes — every placement in your chart is clickable and links to a written interpretation, free to read in full for every planet, sign, and house — no account required.