Big 3 Compatibility Calculator

Person 1

Sun Sign: Select… Aries Taurus Gemini Cancer Leo Virgo Libra Scorpio Sagittarius Capricorn Aquarius Pisces Moon Sign: Select… Aries Taurus Gemini Cancer Leo Virgo Libra Scorpio Sagittarius Capricorn Aquarius Pisces Rising Sign: Select… Aries Taurus Gemini Cancer Leo Virgo Libra Scorpio Sagittarius Capricorn Aquarius Pisces

Person 2

Compatibility Score:

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} .calculator-result { margin-top: 25px; padding: 20px; border: 1px solid #e0e0e0; border-radius: 8px; background-color: #e9f7ef; text-align: center; } .calculator-result h3 { color: #28a745; margin-bottom: 10px; } .calculator-result p { color: #333; line-height: 1.6; } .calculator-result #compatibilityScore { font-size: 2em; font-weight: bold; color: #28a745; } .calculator-result #breakdown { margin-top: 20px; text-align: left; border-top: 1px dashed #ccc; padding-top: 15px; } .calculator-result #breakdown p { margin-bottom: 5px; font-size: 0.9em; color: #666; } var signsData = { "Aries": { element: "Fire", modality: "Cardinal" }, "Taurus": { element: "Earth", modality: "Fixed" }, "Gemini": { element: "Air", modality: "Mutable" }, "Cancer": { element: "Water", modality: "Cardinal" }, "Leo": { element: "Fire", modality: "Fixed" }, "Virgo": { element: "Earth", modality: "Mutable" }, "Libra": { element: "Air", modality: "Cardinal" }, "Scorpio": { element: "Water", modality: "Fixed" }, "Sagittarius": { element: "Fire", modality: "Mutable" }, "Capricorn": { element: "Earth", modality: "Cardinal" }, "Aquarius": { element: "Air", modality: "Fixed" }, "Pisces": { element: "Water", modality: "Mutable" } }; function getElementScore(el1, el2) { if (el1 === el2) return 3; // Same element (e.g., Fire-Fire) if ((el1 === "Fire" && el2 === "Air") || (el1 === "Air" && el2 === "Fire")) return 2; // Complementary (Fire-Air) if ((el1 === "Earth" && el2 === "Water") || (el1 === "Water" && el2 === "Earth")) return 2; // Complementary (Earth-Water) if ((el1 === "Fire" && el2 === "Earth") || (el1 === "Earth" && el2 === "Fire")) return 1; // Neutral/Grounding if ((el1 === "Air" && el2 === "Water") || (el1 === "Water" && el2 === "Air")) return 1; // Neutral/Emotional depth if ((el1 === "Fire" && el2 === "Water") || (el1 === "Water" && el2 === "Fire")) return -1; // Challenging (Fire-Water) if ((el1 === "Earth" && el2 === "Air") || (el1 === "Air" && el2 === "Earth")) return -1; // Challenging (Earth-Air) return 0; } function getModalityScore(mod1, mod2) { if (mod1 === mod2) return -1; // Same modality can lead to clashes (e.g., two Fixed signs being stubborn) return 1; // Different modalities provide balance and dynamic } function getSignPairScore(sign1, sign2) { var data1 = signsData[sign1]; var data2 = signsData[sign2]; if (!data1 || !data2) return { score: 0, description: "Invalid sign selected." }; var score = 0; var description = []; // Element compatibility var elScore = getElementScore(data1.element, data2.element); score += elScore; description.push("Elements (" + data1.element + " & " + data2.element + "): " + elScore + " points."); // Modality compatibility var modScore = getModalityScore(data1.modality, data2.modality); score += modScore; description.push("Modalities (" + data1.modality + " & " + data2.modality + "): " + modScore + " points."); // Bonus for same sign (conjunction) if (sign1 === sign2) { score += 2; description.push("Same Sign Bonus: +2 points."); } // Bonus for opposite sign (opposition) – can be highly complementary or challenging var oppositeSigns = { "Aries": "Libra", "Taurus": "Scorpio", "Gemini": "Sagittarius", "Cancer": "Capricorn", "Leo": "Aquarius", "Virgo": "Pisces", "Libra": "Aries", "Scorpio": "Taurus", "Sagittarius": "Gemini", "Capricorn": "Cancer", "Aquarius": "Leo", "Pisces": "Virgo" }; if (oppositeSigns[sign1] === sign2) { score += 1; // Can be a strong pull, but also requires effort description.push("Opposite Sign Bonus: +1 point."); } return { score: score, description: description.join("") }; } function calculateCompatibility() { var p1Sun = document.getElementById("p1SunSign").value; var p1Moon = document.getElementById("p1MoonSign").value; var p1Rising = document.getElementById("p1RisingSign").value; var p2Sun = document.getElementById("p2SunSign").value; var p2Moon = document.getElementById("p2MoonSign").value; var p2Rising = document.getElementById("p2RisingSign").value; // Validate inputs if (!p1Sun || !p1Moon || !p1Rising || !p2Sun || !p2Moon || !p2Rising) { document.getElementById("compatibilityScore").innerText = "N/A"; document.getElementById("compatibilityDescription").innerText = "Please select all Big 3 signs for both individuals."; document.getElementById("breakdown").innerHTML = ""; return; } var totalScore = 0; var breakdownHtml = "

Detailed Breakdown:

"; // Primary comparisons var sunSun = getSignPairScore(p1Sun, p2Sun); totalScore += sunSun.score; breakdownHtml += "Person 1 Sun (" + p1Sun + ") vs. Person 2 Sun (" + p2Sun + "): " + sunSun.score + " points." + sunSun.description + ""; var moonMoon = getSignPairScore(p1Moon, p2Moon); totalScore += moonMoon.score; breakdownHtml += "Person 1 Moon (" + p1Moon + ") vs. Person 2 Moon (" + p2Moon + "): " + moonMoon.score + " points." + moonMoon.description + ""; var risingRising = getSignPairScore(p1Rising, p2Rising); totalScore += risingRising.score; breakdownHtml += "Person 1 Rising (" + p1Rising + ") vs. Person 2 Rising (" + p2Rising + "): " + risingRising.score + " points." + risingRising.description + ""; // Cross-comparisons var p1SunP2Moon = getSignPairScore(p1Sun, p2Moon); totalScore += p1SunP2Moon.score; breakdownHtml += "Person 1 Sun (" + p1Sun + ") vs. Person 2 Moon (" + p2Moon + "): " + p1SunP2Moon.score + " points." + p1SunP2Moon.description + ""; var p1MoonP2Sun = getSignPairScore(p1Moon, p2Sun); totalScore += p1MoonP2Sun.score; breakdownHtml += "Person 1 Moon (" + p1Moon + ") vs. Person 2 Sun (" + p2Sun + "): " + p1MoonP2Sun.score + " points." + p1MoonP2Sun.description + ""; var p1SunP2Rising = getSignPairScore(p1Sun, p2Rising); totalScore += p1SunP2Rising.score; breakdownHtml += "Person 1 Sun (" + p1Sun + ") vs. Person 2 Rising (" + p2Rising + "): " + p1SunP2Rising.score + " points." + p1SunP2Rising.description + ""; var p1RisingP2Sun = getSignPairScore(p1Rising, p2Sun); totalScore += p1RisingP2Sun.score; breakdownHtml += "Person 1 Rising (" + p1Rising + ") vs. Person 2 Sun (" + p2Sun + "): " + p1RisingP2Sun.score + " points." + p1RisingP2Sun.description + ""; var p1MoonP2Rising = getSignPairScore(p1Moon, p2Rising); totalScore += p1MoonP2Rising.score; breakdownHtml += "Person 1 Moon (" + p1Moon + ") vs. Person 2 Rising (" + p2Rising + "): " + p1MoonP2Rising.score + " points." + p1MoonP2Rising.description + ""; var p1RisingP2Moon = getSignPairScore(p1Rising, p2Moon); totalScore += p1RisingP2Moon.score; breakdownHtml += "Person 1 Rising (" + p1Rising + ") vs. Person 2 Moon (" + p2Moon + "): " + p1RisingP2Moon.score + " points." + p1RisingP2Moon.description + ""; // Normalize score to a percentage var minPossibleScore = -18; // 9 comparisons * min score per pair (-2) var maxPossibleScore = 54; // 9 comparisons * max score per pair (6) var scoreRange = maxPossibleScore – minPossibleScore; // 72 var compatibilityPercentage = ((totalScore – minPossibleScore) / scoreRange) * 100; compatibilityPercentage = Math.max(0, Math.min(100, compatibilityPercentage)); // Ensure it's between 0 and 100 compatibilityPercentage = compatibilityPercentage.toFixed(0); var descriptionText = ""; if (compatibilityPercentage >= 80) { descriptionText = "Excellent compatibility! There's a strong natural synergy and understanding between you. This connection likely feels harmonious and supportive."; } else if (compatibilityPercentage >= 60) { descriptionText = "Good compatibility. You share many harmonious connections, suggesting a solid foundation for understanding and mutual support. Any differences can be easily navigated."; } else if (compatibilityPercentage >= 40) { descriptionText = "Moderate compatibility. While there are areas of natural connection, you may also encounter some differences that require conscious effort and communication to navigate. This can lead to growth!"; } else { descriptionText = "Challenging compatibility. There might be significant differences in your core astrological makeup, which could lead to friction or misunderstandings. However, these challenges can also be opportunities for profound growth and learning if approached with awareness and patience."; } document.getElementById("compatibilityScore").innerText = compatibilityPercentage + "%"; document.getElementById("compatibilityDescription").innerText = descriptionText; document.getElementById("breakdown").innerHTML = breakdownHtml; }

Understanding Your Big 3 Compatibility

In astrology, the "Big 3" refers to your Sun sign, Moon sign, and Rising (or Ascendant) sign. These three placements are considered the foundational pillars of your astrological chart, revealing the core aspects of your personality, emotional world, and how you present yourself to the world. When assessing compatibility between two individuals, comparing these Big 3 placements offers profound insights into the potential dynamics of a relationship.

What Do the Big 3 Represent?

Sun Sign: Your Sun sign represents your core identity, ego, and conscious self. It speaks to your fundamental drive, purpose, and the essence of who you are. In compatibility, it shows how your basic personalities align.
Moon Sign: Your Moon sign governs your emotional nature, subconscious reactions, and inner world. It reveals what makes you feel safe, nurtured, and how you process feelings. Moon sign compatibility is crucial for emotional understanding and domestic harmony.
Rising Sign (Ascendant): Your Rising sign dictates your outward persona, first impressions, and how others perceive you. It's the mask you wear, your physical appearance, and your initial approach to life. Rising sign compatibility influences how you interact on a daily basis and your immediate chemistry.

Why is Big 3 Compatibility Important?

While a full synastry (chart comparison) involves many planetary placements, the Big 3 provide a powerful snapshot of fundamental compatibility. They highlight:

Core Alignment: How your essential selves (Sun) resonate.
Emotional Resonance: The ease with which you understand and meet each other's emotional needs (Moon).
Interpersonal Dynamics: How your outward expressions and initial interactions blend (Rising).

A harmonious blend of these signs suggests a relationship where understanding comes more naturally, emotional support is readily available, and daily interactions flow smoothly. Conversely, challenging aspects can point to areas where more conscious effort, communication, and compromise may be needed.

How This Calculator Works

Our Big 3 Compatibility Calculator analyzes the elemental and modality relationships between your Sun, Moon, and Rising signs and those of another person. It performs nine key comparisons:

Person 1 Sun vs. Person 2 Sun
Person 1 Moon vs. Person 2 Moon
Person 1 Rising vs. Person 2 Rising
Person 1 Sun vs. Person 2 Moon
Person 1 Moon vs. Person 2 Sun
Person 1 Sun vs. Person 2 Rising
Person 1 Rising vs. Person 2 Sun
Person 1 Moon vs. Person 2 Rising
Person 1 Rising vs. Person 2 Moon

Each comparison is scored based on astrological principles of elemental harmony (e.g., Fire with Air, Earth with Water) and modality dynamics (e.g., Cardinal, Fixed, Mutable). These individual scores are then aggregated to provide an overall compatibility percentage, along with a detailed breakdown of each interaction.

Interpreting Your Compatibility Score

80-100% (Excellent): Indicates a highly harmonious connection with strong natural synergy. You likely feel deeply understood and supported, with a natural flow in your interactions.
60-79% (Good): Suggests a solid foundation for compatibility. While there may be minor differences, overall understanding and emotional resonance are strong. This relationship has great potential for growth and happiness.
40-59% (Moderate): Points to a mix of harmonious and challenging aspects. You'll find areas of natural connection, but also differences that require conscious effort, communication, and compromise. These challenges can be opportunities for profound personal and relational growth.
0-39% (Challenging): Indicates significant differences in your core astrological makeup. This doesn't mean the relationship is doomed, but it suggests you may encounter more friction, misunderstandings, or require substantial effort to bridge gaps. It can be a powerful catalyst for learning and evolving.

Remember, astrology is a tool for self-awareness and understanding, not a rigid prediction. Free will, conscious effort, and open communication are always the most important factors in any relationship. Use this calculator as a guide to better understand the energetic dynamics between you and another, fostering deeper empathy and connection.