✦ Free · no sign-up · runs in your browser

Your natal chart, decoded.

Enter your birth date, time and city to calculate your birth chart — with your Big Three, every planet, the twelve houses, aspects and clear interpretations. Free, private and instant.

Example natal chart wheel
  1. Enter your birth date, time and city.
  2. We calculate the sky at that moment — planets, houses, aspects.
  3. Read your full interpretation, save the link or print it.

What You'll Get in Your Natal Chart Report

  • A chart wheel with your planets, houses and aspect lines
  • Your Big Three — Sun, Moon and Rising signs — explained
  • All ten planets with sign, exact degree, house and retrograde status
  • North Node, Midheaven and chart ruler
  • Element & modality balance
  • Every major aspect with an interpretation
  • A shareable link and a print/PDF option

What Is a Natal Chart?

A natal chart — also called a birth chart — is a map of the sky at the exact moment and place you were born. It shows which zodiac sign each planet was in, which of the twelve houses (areas of life) it occupied, and the angles (aspects) between planets. Astrologers read it as a symbolic portrait of your personality, needs and potential.

Your 'zodiac sign' is just your Sun sign — one part of the chart. The full natal chart adds your Moon, rising sign and eight more planets. Read more: what is a natal chart.

Why Your Birth Time Matters

The rising sign (ascendant) moves through all twelve signs in a single day — roughly one sign every two hours — and it determines the houses. Without a birth time you'll still get accurate planet signs (the Moon can occasionally be uncertain), but not your rising sign or houses. See birth chart without birth time.

How Our Calculator Works

Everything is calculated in your browser using astronomical algorithms: planet positions from orbital elements with the main perturbations (accurate to roughly a tenth of a degree or better), your local time converted to Universal Time with historical time-zone and daylight-saving rules, and houses computed with the Placidus or Whole Sign system. Your birth data never leaves your device.

How to Read Your Chart

  1. Start with your Big Three: Sun, Moon and Rising.
  2. Read the personal planets — Mercury, Venus and Mars — in their signs.
  3. Look at which houses hold planets: those life areas are emphasized.
  4. Check the tightest aspects — they show how parts of you work together or clash.
  5. Notice patterns: a dominant element, a stellium, your chart ruler.

Full guide: how to read a birth chart.

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Frequently Asked Questions

Is this natal chart calculator free?

Yes — completely free, with no sign-up. The calculation runs in your browser.

How accurate is it?

Planet positions are calculated astronomically to about 0.1° or better; the Moon to a few arcminutes. Accuracy mainly depends on your birth time — a 10-minute error can shift the rising sign near a sign boundary.

What if I don't know my birth time?

Tick 'I don't know my birth time'. You'll get planet signs and aspects, but not the rising sign or houses.

Which house system should I choose?

Placidus is the most common in Western astrology; Whole Sign is popular with traditional and Hellenistic astrologers. See house systems.

Is my data stored?

No. Your birth details stay in your browser unless you copy the share link yourself.

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