How Our Zodiac Compatibility Scores Are Calculated
A clear guide to the traditional ideas behind Sun-sign matching, their practical uses and their important limitations.
How Our Zodiac Compatibility Scores Are Calculated: a quick answer
A zodiac compatibility score on Astrology Match represents a consistent set of traditional aspect, element and modality rules. It is an editorial mathematical model, not a result of observed relationship statistics. Every zodiac compatibility score is intended for playful reflection, never prediction.
A transparent, repeatable symbolic model
Astrology Match assigns every Sun-sign pair a fixed base score from zodiac-wheel separation, then adjusts for same or complementary elements and selected modalities. Unlike a random number generator, the same combination always gives the same five dimensions. The score is not derived from surveys or measured relationships.
For example, two people might agree on practical routines but find that their ways of showing affection differ. Whether an astrological reading resonates or not, personal experience remains more important than category labels. The comparison is most valuable when it helps people listen instead of assuming.
Starting scores by zodiac separation
The starting values are conjunction 79, semi-sextile 61, sextile 80, square 59, trine 85, quincunx 57 and opposition 72. Same-element pairs add five points, Fire–Air and Earth–Water pairs add three points, and other element combinations subtract one point. Those choices are editorial modeling conventions inspired by traditional symbolism, not verified probabilities.
A useful conversation therefore asks each person to describe what support looks like in everyday life. Whether an astrological reading resonates or not, personal experience remains more important than category labels. The comparison is most valuable when it helps people listen instead of assuming.
How five dimensions are adjusted
Love gains small boosts for complementary elements and Venus associations. Communication gives weight to Air and Mutable qualities; trust emphasizes Earth and matching modalities. Chemistry adds small adjustments for opposition and Fire, while long-term scores emphasize Earth and matching modalities. Every dimension is clamped to a 47–96 range.
For example, two people might agree on practical routines but find that their ways of showing affection differ. Whether an astrological reading resonates or not, personal experience remains more important than category labels. The comparison is most valuable when it helps people listen instead of assuming.
Overall scoring and limitations
The overall percentage is the rounded arithmetic mean of love, communication, trust, chemistry and long-term values. The model is symmetric, so changing partner order does not change a result. No zodiac compatibility score can establish whether a relationship is safe, satisfying or likely to last.
A useful conversation therefore asks each person to describe what support looks like in everyday life. Whether an astrological reading resonates or not, personal experience remains more important than category labels. The comparison is most valuable when it helps people listen instead of assuming.
Exact starting values used by the calculator
| Zodiac separation | Traditional aspect | Base score |
|---|---|---|
| 0 signs / 0° | Conjunction | 79 |
| 1 sign / 30° | Semi-sextile | 61 |
| 2 signs / 60° | Sextile | 80 |
| 3 signs / 90° | Square | 59 |
| 4 signs / 120° | Trine | 85 |
| 5 signs / 150° | Quincunx | 57 |
| 6 signs / 180° | Opposition | 72 |
Every adjustment in the five categories
First, the base is adjusted by +5 for matching elements, +3 for Fire–Air or Earth–Water, or −1 otherwise. Love adds +2 for complementary elements and +2 if either sign has Venus in its listed rulers. Communication subtracts 2, adds 5 if either sign is Air, and adds 2 if either sign is Mutable. Trust subtracts 1, adds 5 if either sign is Earth, and adds 2 when modalities match.
Chemistry adds 3 to the element-adjusted base, plus 7 for an opposition and 3 if either sign is Fire. Long-term subtracts 2, adds 6 if either sign is Earth and adds 2 when modalities match. Each category is rounded and limited to 47–96, and the overall percentage is the rounded arithmetic mean of the five categories. Each pair always gets the same numbers regardless of order.
Evidence notice: zodiac aspect, element and modality terminology belongs to traditional Western astrology. The specific weights and percentages are original editorial choices, not calibrated against couples or independently validated as probabilities. Traditional symbolism can explain the composition of the score but cannot prove that a relationship will succeed. Actual communication, respect and consent are more important than any chart.
How should you interpret a zodiac compatibility score?
A zodiac compatibility score is a numerical way of summarizing symbolic Sun-sign factors. It should invite questions about communication, boundaries and shared routines rather than declare who is a perfect partner. No zodiac compatibility score can measure affection or predict marriage.
Can a zodiac compatibility score be wrong?
These percentages are not scientific estimates, so a zodiac compatibility score cannot be validated against a particular relationship in the way that a measured probability could. People should trust their lived experiences and the actions of the other person above any symbolic number.
How to put the idea into practice
Choose a real question you can both answer, such as what makes you feel appreciated or how you prefer to discuss a disagreement. Read the symbolic interpretation as one possible prompt, and give each person room to agree, disagree or add context. If the question is about trust or safety, rely on actual behavior and boundaries rather than astrology.