Big 3 astrology calculator: Sun, Moon, Rising
Your Sun, Moon and Rising
Your Sun and Moon from your birthday. Add a time and city for your Rising sign.
No account, no photo. We don’t store your birthday on our servers.
How it works
Your Big Three are your Sun, Moon and Rising signs. Type your birthday and you get your Sun and Moon right here. Add your birth time and city, and you get your Rising sign too. The tool tells you plainly when a result is certain and when it is a best guess.
Your Sun sign comes from your birthday alone. It uses the standard tropical date ranges, like Aries from March 21 to April 19.
Your Moon sign comes from a real sky calculation. The engine finds where the Moon was at your birth time. Leave the time blank and it uses noon.
The Moon moves about 13 degrees a day, so on many days it switches sign partway through. When that happens on your birthday, the tool says so and names the moment, like "the Moon changed sign at 3:12 pm." Born before that, you get the first sign; after, the second.
Your Rising sign needs both your birth time and your city. The tool finds the sign on the eastern horizon at that moment. No time or place means no Rising sign, and it never guesses one.
Each sign you get comes with the same short summary the Palmy app shows.
Sun, Moon, Rising, Life path
In astrology, your Sun sign is the core of who you are. It is the energy you give off day to day. It comes from where the Sun sat on your birthday, and it is what most people mean by "your sign."
In astrology, your Moon sign is your inner world. It stands for what you feel underneath and what helps you feel safe. It comes from where the Moon was when you were born, so it can need your birth time to be exact.
In astrology, your Rising sign is the first impression you give. It is the sign that was coming up over the horizon at the exact minute and place you were born. Tradition says it shapes your style and how you meet a room.
Your Life Path number comes from numerology, not the sky. You add up the digits of your birth date until one number is left. Some totals, like 11, 22 and 33, stay as they are and are called master numbers. This tool does not show it; the Palmy app does.
Questions
Why does my Rising sign differ from site to site?
Small input differences do it. A site may default an unknown time to midnight, use a different time zone, or skip the birthplace. The Rising sign changes about every two hours, so any of those can flip it. This tool asks for both time and city and never fills in a fake one.
Would 10 minutes change anything?
For your Sun, no. For your Moon, only on a sign-change day and only if the switch fell inside those minutes. For your Rising, it can matter near a sign boundary. If your recorded time is close to a boundary, try both times and see if the sign holds.
How often does the Rising sign change?
About every two hours, since all twelve signs pass over the horizon in one day. It is the fastest-moving of the three. That is why a rough time like 'sometime in the afternoon' can still leave two or three possible Rising signs.
Can I guess my Rising sign from how I look?
No. People try this, and it is a fun game, but there is no reliable link between faces and signs. The Rising sign is a position in the sky at a moment and a place. Only a time and a city can give it to you.
What if my Sun, Moon and Rising are all the same sign?
It can happen, though it is uncommon. It means the Sun and Moon were both in that sign, and it was also on the horizon when you were born. Astrologers often say the sign's traits feel extra strong. Three summaries of the same sign, read together, are the result.
I was born on July 22. Am I a Cancer or a Leo?
The tool uses fixed calendar ranges, so July 22 counts as Cancer and July 23 as Leo. In real life the Sun crosses over at one exact moment, which shifts by a day in some years. If you were born within a day of a cutoff, your Sun sign is a close call. This tool does not settle it; a sky calculation with your year and time can.
What this can and can’t tell you
This is for fun, not a science of who you are. The Sun sign uses calendar cutoffs, so cusp days are a close call. The Moon at noon is a best guess, and the tool flags the days when it moved. The Rising sign is only shown when you give a time and a place. For fun, not fate.
Also: the Moon sign calculator · friendship calculator · what Palmy is
—
No birth time? Use the Moon sign calculator →
Palmy is in App Store review.
Your whole chart, the real sky every morning, and what today does to you and a friend — plus your palm read from your actual lines.
We’ll send this page — and the day it’s live. One email, no spam. We keep your email and the names on this page, not your birthday.
For fun, not fate.