A Zodiac Compatibility Test analyzes the astrological signs of two individuals to predict how well they may connect romantically or socially. It is based on Western astrology traditions which divide the year into 12 zodiac signs, each carrying distinct personality traits and energies. Our tool compares your sun sign with your partner's and generates a compatibility score based on classical astrological pairings.

The score is based on astrological elements and modalities:

• Elements: Fire, Earth, Air & Water — complementary elements score higher.
• Modalities: Cardinal, Fixed & Mutable qualities are weighed for harmony.
• Traditional pairings: Classic astrology wisdom on sign synergies is applied.
• Planetary rulers: Ruling planets of each sign factor into the result.

Absolutely! While framed around romance, the astrological principles apply to any relationship — friendships, family, or colleagues. Simply enter any two zodiac signs and interpret the result in the context of your relationship type.

If your birthday falls within 2–3 days of a sign transition, you may feel traits of both signs. Our tool uses sun signs only, so choose the sign you most identify with. For maximum accuracy near a cusp, use a full birth chart calculator with your exact birth time and location.

Not at all. A lower score simply suggests these two signs may need more understanding and effort. Countless real couples with "low-compatibility" signs have thriving, long-lasting relationships. Astrology reflects tendencies — it never determines any relationship's outcome. Personal effort and shared values matter far more.

Full astrological synastry uses the entire birth chart — Moon sign, Rising sign, Venus, Mars and more — requiring an exact birth date, time and place. Our tool is designed as a quick sun-sign overview, accessible to everyone without birth time data. For a deep reading, consult a professional astrologer.

No. The tool is completely anonymous. We do not collect, store, or share any personal information. All calculations run entirely in your browser — your selections are never sent to any server. No sign-up or account is required.

Yes on both counts! The Zodiac Compatibility Test is completely free — no subscription, no hidden fees. It works on all devices including smartphones, tablets and desktops with no app download needed.