Discover your natal chart in seconds. Enter your birth date, time and place, and we will map the exact position of the Sun, Moon and planets at the moment you were born. Your birth chart is the blueprint of your personality, and it starts with your Big Three: your Sun sign (who you are), your Moon sign (how you feel) and your rising sign (how the world sees you).
Your Big Three: Sun, Moon and rising sign
Your results open with the Big Three, the placements that shape most chart readings. Your Sun sign describes your core identity and is the sign most people already know, since the Sun spends about a month in each sign. Your Moon sign speaks to your emotions and to what helps you feel safe. The Moon moves quickly and changes sign about every two and a half days, so your birth date alone is not always enough to place it.
Your rising sign, also called the ascendant, is the sign that was rising on the eastern horizon at the moment you were born. It describes the first impression you make and your outward style. It changes about every two hours, so it needs your birth time. Each of the 36 Big Three placements has its own page in our astrology hub, where you can read about your Sun, Moon and rising sign one at a time.
What each planet in your chart describes
Beyond the Big Three, your chart places each planet in a sign, and each planet covers a different part of life.
- Mercury describes the way you think and learn, which also shapes the way you speak.
- Venus shows how you love and what you value.
- Mars is your drive and desire, and it shows how you act.
- Jupiter stands for growth and luck along with a generous streak, and it spends about a year in each sign.
- Saturn covers discipline and the limits that teach long-term lessons, and it spends about two and a half years in each sign.
- Uranus stands for independence and sudden change, and it spends about seven years in each sign, so it describes your generation more than you alone.
- Neptune covers imagination and intuition, the dreaming side of you, and it spends about fourteen years in each sign, so it also speaks more to a generation than to one person.
- Pluto stands for power and transformation, and it spends between about twelve and thirty years in each sign, so like Uranus and Neptune it describes a generation more than a person.
Why your birth time matters
Your birth time decides your rising sign, which changes about every two hours. It can also settle your Moon sign, because the Moon sometimes changes sign during the day you were born. The most reliable source is the time on your birth certificate or hospital record.
If you do not know the time, the calculator still gives you your Sun and every planet in its sign. It simply leaves the rising sign out. A time that is off by a few minutes rarely changes the Big Three, so a close record is good enough.
How this calculator works
Enter your birth date and birth place, then add your birth time if you know it. The place search finds your town or city using OpenStreetMap data. The calculator then works out the planetary positions with the Swiss Ephemeris, a widely used astronomical ephemeris.
Your birth details are used only to calculate the chart and are not saved. The calculator is free and needs no account.
Where to go from your chart
Every placement in your results matches a page in our astrology hub, such as Moon in Cancer or Venus in Leo, where it is explained in full. Our daily horoscope gives a reading for each Sun sign every day. Our guide to sign-specific tarot readings shows the tarot card linked to each zodiac sign, so you can connect your chart with the cards.
Birth chart questions
Do you need your birth time to use the birth chart calculator?
No. The calculator works with your birth date and birth place, and it gives you your Sun sign along with every planet in its sign. Your rising sign is the exception. It changes about every two hours, so it needs a birth time, and without one the calculator leaves it out of your results.
What if you only know your rough birth time?
Use your best estimate. Your Sun and planets will be right either way. Your rising sign may not be, because it changes about every two hours and a rough time can land on the wrong one. The time on a birth certificate or hospital record is the best source if you can find it.
Are your birth details saved?
No. Your birth date, place and time are used only to calculate your chart, and they are not saved. The calculator is also free and needs no account, so you can use it as often as you like without signing up or handing over an email address.
Why is your rising sign different from your Sun sign?
The two come from different parts of your birth details. Your Sun sign comes from your birth date, because the Sun spends about a month in each sign. Your rising sign comes from your birth time and place, because it is the sign rising on the eastern horizon at that moment. That is why the two often differ.
How precise are the planetary positions?
The positions come from the Swiss Ephemeris, a widely used source of astronomical data that is precise to a small fraction of a degree. In practice, the accuracy of your chart depends far more on your birth details than on the calculation itself, and the birth time matters most because it decides your rising sign.
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