Free tool
Sun, Moon and Rising Sign Calculator (Big Three)
Your big three are the signs of the Sun, the Moon and the Rising sign (Ascendant)ACThe sign on the eastern horizon at the moment you were born. It is the part of the chart that moves fastest, so it depends most on the birth time.Learn more →. Enter your date and place to see all three, and which of them depends on your birth time. The time is optional.
Narrow it down with your life events
A calculator needs a time. Our report works the other way round: it tests the possible times against the dated events of your life and sends the most likely window, with the evidence and a confidence level. First, the free range check shows how many rising signs fit.
Start my rectification — US$ 79See a finished report first in the sample report.
Which of the big three depends on the time?
The rising sign always does: it changes about every 2 hours. The Moon sign does only on dates when the Moon changes sign, which is roughly four dates in ten. The Sun sign does only on the one date a month when the Sun moves into a new sign.
Each card is marked, so you can see where a doubtful birth time could change the result and where it can't.
Born in the US?
Birth records are kept by each state, so what appears on your certificate depends on the state and the year. Read how to find out what time you were born for where to look.
Short answers
- What is the big three in astrology?
- Your Sun sign, your Moon sign and your rising sign (the Ascendant). They are three points of the birth chart.
- Can I find my big three without a birth time?
- You can find your Sun sign, and your Moon sign on most dates. The rising sign needs a time. The free range check lists every rising sign that fits a range of hours.
- Does it handle daylight saving time?
- The time you enter is read as the clock time at your place of birth in the US, using the historical time zone rules for that date, including daylight saving time. If the clocks went forward and your time falls in the skipped hour, the calculator tells you.
More free tools
- Ascendant calculatorYour rising sign and Midheaven, and how long your sign lasts.
- Moon sign calculatorFind out if your birth time can change your Moon sign.
- Midheaven calculatorYour MC sign and how far it moves in two hours.
- Houses calculatorPlacidus cusps and the planets that change house.
- How to find your rising signThree ways, from a calculator to a range check.
- How to find out what time you were bornWhere to look for your birth time, and what to do if you can't find it.
- Birth chart without a birth timeWhat you can use and what needs the time.
- Free range checkEvery rising sign that fits inside a range of hours.
Want more than a range? See what a full report looks like in the sample report, or start yours.
Astrology is a symbolic practice, not a science. Your report gives the most consistent birth-time window for the events you share. It is not a certified birth time.