Is this sun, moon and rising calculator accurate?

It uses astronomical formulas for the positions of the Sun and Moon and the rising degree, in the tropical zodiac used by most Western astrologers. Results should match other major calculators to the degree. Differences usually come from a wrong birth time, place or time zone.

Why is my sun sign different from what I thought?

If you were born within a day of a sign change, your sun sign depends on the exact time and place. Many people on the cusp find their real sun sign is the neighbouring one. This tool uses your exact birth time when you enter it.

Which is more important, sun, moon or rising?

None of them tells the whole story. Many astrologers see the sun as who you are, the moon as how you feel and the rising sign as how you meet the world. A full birth chart adds the planets, houses and aspects.

Free Sun, Moon & Rising Sign Calculator (Big 3)

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Free Sun, Moon and Rising Sign Calculator

Enter your birth date, time and place to find your sun, moon and rising sign, often called your Big 3. You get each sign with a plain-English explanation. It is free, runs in your browser, and nothing you enter is stored.

Last updated: October 15, 2026 · Tropical zodiac

Calculate your Big 3

Birth date

Birth time

I don’t know my birth time

Birth city

City not listed? Enter coordinates and time zone

Use a nearby big city’s time zone name from the IANA list. West and South are negative.

Your details are used in your browser only. Nothing is sent or saved.

Your Big 3 in 30 seconds

Sign	Shows	Needs	Changes every
Sun	Who you are at your core	Birth date	~30 days
Moon	How you feel and what you need	Date, ideally time	~2.5 days
Rising	How others see you	Exact time and place	~2 hours

Birth time matters most for your rising sign: 15 minutes can shift it. Use the time on your birth certificate and the city where you were born. The calculator handles time zones and daylight saving for you. For more depth, see our sun sign guide.

How it works: your local time is converted to universal time, then the Sun, Moon and rising degree are calculated with the open-source Astronomy Engine library (MIT licence), in the tropical zodiac. Dates 1900 to 2100, places below 66° latitude. For reflection and entertainment.

What next?

Add every planet and house with our full birth chart calculator.
See how your signs work in love: relationships in astrology.
New to astrology? Start with astrology basics for beginners.

Want to go deeper? See the best astrology books for beginners.

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Sun, moon and rising calculator FAQ

Can I find my rising sign without a birth time?

Not accurately. The rising sign changes about every two hours, so you need your birth time to know it. Without a time, this tool shows your sun sign and the moon sign range for that day, and tells you when the rising sign cannot be known. Your birth certificate or hospital record usually has the time.

What if I don't know my birth time?

Check your birth certificate, ask a parent or relative, or request the record from the hospital or registry. If you cannot find it, tick “I don’t know my birth time”. You will still get your sun sign, and your moon sign if it does not change that day.

What is the difference between sun, moon and rising signs?

Your sun sign is your core identity and what drives you. Your moon sign is your emotional side, what you need to feel safe. Your rising sign, or ascendant, is your outer style and first impression. Together they are called your Big 3.

Is this calculator free and private?

Yes, it is free. The calculation runs entirely in your browser. Your birth date, time and place are not sent to our server and are not stored.

Does this use tropical or sidereal signs?

Tropical, the system used in Western astrology. Vedic astrology uses sidereal signs, which are about 24 degrees behind, so your Vedic signs will usually differ.

What is the difference between sun, moon and rising signs?

Your sun sign is your core identity. Your moon sign is your emotional side, what you need to feel safe. Your rising sign is your outer style and first impression. Together they are your Big 3.

Keep exploring

Astrology is a tool for reflection and entertainment. It is not a substitute for professional medical, legal or financial advice.