Calculate your natal chart from your birth date, birth time and birthplace. See your Sun sign, Moon sign, rising sign or Ascendant, Mercury, Venus, Mars and house placements when your birth time is known.
Exact birth time gives the most accurate rising sign and houses.
STARIS IS CALCULATING
Mapping your birth moment…
BIRTH CHART CALCULATOR GUIDE
A birth chart, also called a natal chart or astrology chart, is a map of where the Sun, Moon and planets were positioned for the date, time and place of birth you enter. This free birth chart calculator shows the placements people most often search for, including the Big Three—Sun, Moon and rising sign—plus Mercury, Venus, Mars and house context when the birth time is reliable.
NATAL CHART BASICS
A natal chart is the full astrology chart for your birth moment. Your Sun sign is one part of it; the chart can also include the Moon, Ascendant or rising sign, Mercury, Venus, Mars, Jupiter, Saturn, outer planets, houses and aspects.
That is why a natal chart calculator gives a more detailed result than a simple zodiac-sign lookup based only on your birthday.
SUN, MOON & RISING
Your Sun sign is calculated from the Sun’s zodiac position, your Moon sign from the Moon’s position, and your rising sign or Ascendant from the eastern horizon at your exact birth time and location. Together they are often called the Big Three.
Use the calculator above to see all three in one result instead of searching for each placement separately.
BIRTH TIME ACCURACY
You can calculate many planetary signs from a birth date, but the rising sign and houses are time-sensitive. A correct birthplace is also important because the Ascendant and house structure depend on the local horizon.
If you do not know your exact birth time, Staris can still show stable planetary placements but will not present a guessed rising sign or house placement as exact.
PLANETS, HOUSES & ASPECTS
Mercury is commonly read for communication and thinking, Venus for love and values, and Mars for action and desire. Houses describe where themes tend to show up, while aspects describe how placements interact with each other.
The free calculator gives you the chart facts and clear starter interpretations. A deeper Staris reading connects those placements into one pattern and adds current timing context.
COMMON QUESTIONS
Answers to common searches about free natal charts, Sun Moon and rising signs, birth time and birth chart accuracy.
Your birth chart, also called a natal chart, is the astrology chart calculated for your birth date, birth time and birthplace. It can include your Sun, Moon, rising sign, planets, houses and aspects.
Yes. You can calculate your core birth chart placements and read the free result without creating an account. A Staris profile is optional and unlocks deeper chart synthesis and follow-up features.
Enter your birth date, exact birth time and birthplace above. The calculator uses those details to find your Sun and Moon positions and, when the birth time is known, your rising sign or Ascendant.
Yes, but the result is more limited. Many planetary signs can still be calculated, while the rising sign, houses and other time-sensitive details should not be treated as exact without a reliable birth time.
Yes. “Natal chart,” “birth chart” and “astrology birth chart” are commonly used for the same chart calculated for the moment and place of birth.
Birthplace provides the geographic context needed for the local horizon and house structure. It is especially important for calculating the Ascendant or rising sign accurately.
KEEP EXPLORING
Compare two charts for chemistry and relationship patterns.
Try it → FREE TOOL Rising SignFind your Ascendant and your first-impression style.
Try it → FREE TOOL Moon SignDiscover your emotional nature and what feels safe.
Try it → FREE TOOL Venus SignUnderstand your love style, attraction and affection.
Try it →THE CALCULATOR IS THE START
Save your natal chart in Staris to connect your Sun, Moon, rising sign, planets, houses and aspects with personalized interpretation, follow-up questions and daily astrology timing.
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Your birth moment is the foundation of your natal chart. Exact time improves accuracy.
Don't know your birth time? Leave blank — Staris will estimate.
Exact coordinates give you an exact chart. We only use this for calculations.
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This shapes how Staris speaks to you.
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