Birth Chart (Natal Chart) Calculator
Calculate your Sun, Moon and Rising sign in one form. Birth time is required for Moon and Rising sign calculation.
Astrology is not a scientific discipline; this tool is for entertainment and personal exploration. The calculation is based on astronomical formulas and gives approximate results.
What Is a Birth Chart (Natal Chart)?
A birth chart is a snapshot of the sky taken at the exact moment and place of your birth. An astronomical map is drawn showing where the Sun, Moon and all planets were positioned — in which sign and in which region of the sky — at that precise second. That is why no two people's natal charts are ever identical; as birth time and place change, so does the chart.
This map is used in astrology to interpret a person's nature, tendencies and life patterns. Even twins born on the same day just a few minutes apart can have different rising signs — illustrating just how decisive the exact birth time is.
How Is a Birth Chart Created and Interpreted?
Three pieces of information are needed to create a birth chart: birth date, birth time and birth place. The tool takes these inputs and uses astronomical calculations to place each planet in its sign based on its position along the ecliptic. The result is summarised as your sun sign (who you are), moon sign (how you feel) and rising sign (how you appear to others).
Why Are Birth Time and Birth Place Critical?
Because the sun sign changes roughly every 30 days, birth date alone is sufficient. The moon sign changes sign every ~2.5 days, so birth time is recommended — if the moon is changing sign that day, the time determines the correct one. The rising sign changes every ~2 hours, so both time and birth location (latitude/longitude and time zone) are mandatory. The country/city selection in this tool automatically accounts for the UTC offset and daylight saving time.
Key Elements in Your Chart: Planets, Houses and Aspects
A complete natal chart includes 10 planets, 12 houses and the angles (aspects) those planets make with each other. This tool calculates the three core points — these three serve as the essence and starting point of a natal chart. For a more comprehensive analysis, tools like Astro.com or an experienced astrologer can be consulted.
The Meaning of the 12 Houses in an Astrology Chart
The 12 houses represent different areas of life: identity, values, communication, family, creativity, health, relationships, transformation, philosophy, career, community and the soul/subconscious. Whichever house a planet occupies, it carries energy and themes toward that area. For example, a strong Venus in the 7th house signals prominent energy in the area of relationships and partnerships.
Sun, Moon and Rising Sign (The Big Three)
Known as the "Big Three," this combination is the most widely used astrological personality summary. Sun = conscious identity and ego, Moon = emotional world and instincts, Rising = outward image and first impression. Knowing all three together offers a far more complete and accurate picture than knowing only your sun sign.
You can also explore your moon sign and rising sign individually with this tool. When examining zodiac compatibility between two people, evaluating the Big Three together provides a much more reliable analysis.