Free Sun Sign Calculator

How your Sun sign is calculated

Your Sun sign is the zodiac sign the Sun occupied at the exact moment you were born — your core identity, vitality and the self you are growing into. Most websites assign it from fixed calendar date ranges, but the Sun does not change sign on the same day or time each year: the boundary drifts by a day or more, so anyone born near a cusp can be handed the wrong sign by a simple lookup table. AstroNoir instead computes the Sun true position from the Swiss Ephemeris — the arc-second-accurate planetary data (built on NASA and JPL ephemerides) that professional astrologers treat as the gold standard — using your exact date, time and place. We then place your Sun by house, which shows the area of life where your identity most wants to express itself.

Why your real Sun sign can sometimes surprise you

If you have ever been told you are one sign but never quite felt like it, a cusp birthday may be the reason. The Sun crosses from one sign into the next at a precise minute that shifts from year to year — so a date-range chart can be a full sign off, while an exact calculation settles it for good. Your Sun is your conscious identity and direction, but it is only the headline of your chart. Read it together with your Moon sign (your emotional core) and your Rising sign (how the world first meets you) for a picture that actually sounds like you.

The 12 Sun signs

♈ Aries (Mar 21 – Apr 19) — A pioneering, courageous core — you are wired for action, initiative and the thrill of being first. Strengths: bravery, drive, honesty, the will to start what others only talk about. Growth edge: impatience, a short fuse, charging ahead before you look. You meet life head-on, learning by doing rather than waiting for permission.

♉ Taurus (Apr 20 – May 20) — A steady, grounded core that builds for the long term and savours the physical world. Strengths: patience, loyalty, reliability and a real gift for comfort, beauty and resources. Growth edge: stubbornness and resisting change long after it is needed. You move slowly and deliberately, trusting what you can see, touch and depend on.

♊ Gemini (May 21 – Jun 20) — A curious, quicksilver core that lives through ideas, words and connection. Strengths: wit, adaptability, communication and an endless appetite for learning. Growth edge: restlessness, scattered focus and overthinking. You approach life as a conversation — sampling widely, linking everything, rarely bored.

♋ Cancer (Jun 21 – Jul 22) — A deeply feeling, protective core that leads with care, memory and emotional intelligence. Strengths: loyalty, nurturing, intuition and devotion to the people and places you call home. Growth edge: moodiness, clinging and taking things to heart. You meet life through the heart, building safety before you take a risk.

♌ Leo (Jul 23 – Aug 22) — A radiant, generous core that needs to create, express and lead from the heart. Strengths: warmth, confidence, loyalty and a natural gift for inspiring others. Growth edge: pride, drama and a hunger for recognition. You live a little centre-stage, giving generously and shining brightest when you feel seen.

♍ Virgo (Aug 23 – Sep 22) — A precise, improving, service-minded core that sees what could be better and quietly makes it so. Strengths: diligence, discernment, practicality and genuine helpfulness. Growth edge: perfectionism, worry and harsh self-criticism. You approach life by refining the details, craving usefulness and order.

♎ Libra (Sep 23 – Oct 22) — A relational, aesthetic, fair-minded core that finds itself through others and seeks balance. Strengths: charm, diplomacy, a sense of justice and an eye for beauty. Growth edge: indecision, people-pleasing and avoiding conflict. You weigh both sides of everything, happiest in harmony and partnership.

♏ Scorpio (Oct 23 – Nov 21) — An intense, all-or-nothing core drawn to depth, truth and transformation. Strengths: focus, loyalty, emotional courage and the power to regenerate after anything. Growth edge: jealousy, control and difficulty letting go. You go all in or not at all, guarding a rich and private inner world.

♐ Sagittarius (Nov 22 – Dec 21) — A freedom-loving, truth-seeking core that lives for meaning, adventure and the bigger picture. Strengths: optimism, honesty, vision and an appetite for growth. Growth edge: restlessness, bluntness and overpromising. You treat life as an expedition, always reaching toward the next horizon.

♑ Capricorn (Dec 22 – Jan 19) — A disciplined, ambitious, enduring core that builds for the long game and respects mastery. Strengths: responsibility, patience, integrity and real staying power. Growth edge: rigidity, pessimism and tying your worth to achievement. You move strategically, climbing steadily toward goals that matter.

♒ Aquarius (Jan 20 – Feb 18) — An original, future-facing core that thinks in systems and ideals and refuses to conform. Strengths: independence, vision, humanitarian instinct and inventive thinking. Growth edge: detachment, stubbornness and aloofness. You approach life as an experiment, loyal to the collective and to your own truth.

♓ Pisces (Feb 19 – Mar 20) — A dreamy, compassionate, boundary-dissolving core that feels the whole and creates from the unseen. Strengths: empathy, imagination, intuition and artistry. Growth edge: escapism, blurred boundaries and self-sacrifice. You meet life through feeling and imagination, longing to merge with something larger.

Your Sun through the 12 houses

Your Sun sign is the flavour of your identity; the house it lands in shows the area of life where that identity most wants to shine — which is why your birth time matters. Once you know your house, this is where your core self comes alive.

House 1 — identity is front and centre; you express yourself through your presence and drive, with a strong, visible sense of self.

House 2 — you shine through what you build, value and own; self-worth, money and the material world are where you prove yourself.

House 3 — identity flows through your mind and voice; learning, talking, writing and connecting are central to who you are.

House 4 — your core lives at home and in your roots; family, belonging and your private base are where you truly become yourself.

House 5 — you shine through creativity, romance, play and self-expression; you are here to create and to be seen doing it.

House 6 — identity is forged through work, craft, service and health; you prove yourself by being useful and doing things well.

House 7 — you come into focus through relationships; partnership and other people mirror your identity back to you.

House 8 — you express yourself through depth, intimacy and transformation; shared resources, power and the hidden are your terrain.

House 9 — your identity expands through meaning, travel, study and belief; you shine when exploring the bigger picture.

House 10 — you are wired for the public eye; career, reputation and achievement are where your identity most wants to express itself.

House 11 — you shine through community, friendship and shared visions; you find yourself among groups and future-facing goals.

House 12 — your core works quietly behind the scenes; solitude, spirituality and the unseen are where your real self lives.