Your date of birth (day, month, and year). Your exact time of birth (check your birth certificate or ask your parents if you’re unsure. If you can’t find this information, make an estimate or contact a local records office to ask for a birth certificate duplicate). Your place of birth (town, state or province, and country).
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Entering your gender (many sites include non-binary or “prefer not to say” options). Choosing a circular chart or a table (most sites default to a circular chart, which is easier to visualize and read for beginners). Selecting a house system. If you’re new to chart reading, opt for Whole-Sign (each house will line up exactly with a zodiac sign and make for an easy-to-read chart). If you have a preferred system, like Placidus, Koch, or Porphyry, go ahead and choose that.
Signs can also be split into 3 decans, or sections that are 10 degrees wide. 0-9 degrees of a sign is the 1st decan, 10-19 degrees is the 2nd, and 20-29 degrees is the 3rd.
Not all charts will show degree markings. If this happens, remember that degrees grow from 0 to 29 counterclockwise and make your best estimate. Some charts might indicate minutes along with degrees if a planet is between degrees. There are 60 minutes in 1 degree. If you chose a Whole-Sign house system, each house will be 30 degrees wide and correspond exactly to a zodiac sign. Other systems will show houses overlapping with signs at differing widths.
Most chart generators will include a key to help you pair a planet with its glyph. Some signs and houses might have multiple planets in them while others have none. This is totally normal—every person’s chart has varying planet placements, which is what makes your chart unique to you!
If Mercury is just barely inside the Gemini sign at 1 or 2 degrees, you’d say that Mercury is 2 degrees Gemini. If Jupiter appears right in the middle of Scorpio, you’d estimate that Jupiter is about 15 degrees Scorpio. If Pluto is about to exit Sagittarius, you’d say Pluto is 28 degrees Sagittarius.
The sun represents your ego and true identity. The moon influences your internal emotions and thoughts. Mercury governs your intellect and communication style. Venus rules beauty, sensuality, and romance. Mars represents willpower, aggression, and sex drive. Jupiter is the king of optimism, good luck, and learning. Saturn is the planet of structure, responsibility, and challenges. Uranus is the eccentric ruler of innovation and progress. Neptune influences your spirituality, empathy, and imagination. Pluto embodies your personal power, hidden struggles, and transformations.
A conjunction happens when 2 planets are within a few degrees of each other. When this happens, they blend their energy together. A sextile happens when planets are about 60 degrees (2 zodiac signs) apart. Planets in this aspect work together harmoniously, often bringing about a good mood. When 2 planets are square (90 degrees or 3 zodiac signs apart), they’re in opposition to each other. Expect tension and conflict between the planets’ energies. When 2 planets are trine (about 120 degrees or 4 zodiac signs apart), they work together to bring you luck and opportunity. When planets are in opposition, they are 180 degrees apart (directly across the circle from each other, or 6 signs apart). Opposition can bring balance between the planets’ energies, or create obstacles.
A quincunx aspect occurs when planets are 150 degrees apart. Tension arises between the planets because they can’t balance their energies, and one planet will eventually overcome the other. This is the most important of the minor aspects. When planets are 72 degrees apart, they form a quintile. Quintile planets can give you a boost in ambition and creativity. A semi-sextile relationship happens when planets are 30 degrees apart. Semi-sextile planets struggle to understand each other, but have the opportunity to learn how to work together. A semi-square relationship (45 degrees apart) isn’t as tough to handle as a square, but will still result in subtle friction. When planets are 135 degrees apart, they form a sesquiquadrate aspect. These planets have no interest in working together and result in stubborn feelings. When planets are bi-quintile (144 degrees apart), they have a favorable relationship resulting in inventiveness and originality. A septile happens when 2 planets are one seventh of a circle apart (exactly 51 degrees and 25 minutes apart). 7 is a divine number, and planets in this aspect can awaken new spiritual or artistic insights for you.
If your Mercury is 15 degrees Gemini, you’ll feel the full force of Gemini in your communication style—talkative, fast-paced, and witty—since the planet is right in the middle of the sign. Say your ego-governing sun is septile with Jupiter, the planet of optimism and learning. You might feel new inspiration or insight in the form of personal growth, expansion, or learning. Imagine Venus and Mars are in conjunction at 10 degrees Sagittarius. When the planets of sensuality and willpower blend their energies, you might feel intense passion and commitment in your love life. In the adventurous and fiery sign Sagittarius, this passion could manifest as romantic spontaneity or a robust and fun sex life.
