Ashtakoota & Synastry

In Vedic astrology, Ashtakoota Milan (ahsh-ta-KOO-ta mee-LAHN) — literally “eight-point meeting” — is the classical system for evaluating marriage compatibility. It compares the birth nakshatras and Moon signs of two individuals across eight factors, producing a score out of 36 points. While widely used as a first filter in traditional matchmaking, serious practitioners always follow it with full chart synastry.

The Eight Kootas

Each koota tests a different dimension of compatibility. The point values increase with the factor’s importance.

1. Varna (1 Point) — Spiritual Compatibility

Varna (VAR-na) classifies nakshatras into four spiritual temperaments: Brahmana (priestly/intellectual), Kshatriya (warrior/administrative), Vaishya (merchant/pragmatic), and Shudra (service/laboring). The groom’s varna should ideally be equal to or higher than the bride’s. This koota reflects alignment in spiritual outlook, values, and life orientation. One point is awarded when the condition is met; zero otherwise.

2. Vashya (2 Points) — Mutual Attraction and Influence

Vashya (VAHSH-ya) means “amenability” or “control.” It classifies Moon signs into five categories: Chatushpada (quadruped), Manava (human), Jalachara (aquatic), Vanachara (wild), and Keeta (insect). Certain categories are naturally drawn to others. Full 2 points are given for mutual vashya; 1 point for one-sided attraction; 0 for incompatible types. This koota gauges how naturally the two individuals will gravitate toward each other and maintain mutual influence.

3. Tara (3 Points) — Destiny Compatibility

Tara (TAH-ra) measures nakshatra-based destiny alignment. The 27 nakshatras are counted from the bride’s nakshatra to the groom’s (and vice versa), then divided by 9. The remainder maps to one of nine tara categories: Janma, Sampat, Vipat, Kshema, Pratyari, Sadhaka, Vadha, Mitra, and Ati-Mitra. Favorable taras (Sampat, Kshema, Sadhaka, Mitra, Ati-Mitra) earn points. Both directions must be checked — compatibility must be mutual. Maximum 3 points when both directions are favorable.

4. Yoni (4 Points) — Physical and Sexual Compatibility

Yoni (YO-nee) assigns each nakshatra an animal symbol — horse, elephant, sheep, serpent, dog, cat, rat, cow, buffalo, tiger, deer, monkey, mongoose, or lion. Each animal has a natural enemy pair (e.g., cat and rat, snake and mongoose). When both partners share the same yoni animal: 4 points. Same species but opposite gender: 3 points. Friendly animals: 2 points. Neutral: 1 point. Enemy animals: 0 points. This koota addresses physical compatibility and instinctual harmony.

5. Graha Maitri (5 Points) — Mental Compatibility

Graha Maitri (GRA-ha MY-tree), also called Rasyadhipati, evaluates the friendship between the lords of each person’s Moon sign. Planetary friendships follow a fixed scheme from classical texts: some planets are natural friends (e.g., Sun and Moon), some neutral, some enemies (e.g., Sun and Saturn). When both Moon-sign lords are mutual friends: 5 points. One friendly, one neutral: 4 points. Both neutral: 3 points. One friendly, one inimical: 1 point. Mutual enemies: 0 points. This koota is critical — it reflects whether two minds can naturally understand each other.

6. Gana (6 Points) — Temperament

Gana (GAH-na) classifies nakshatras into three temperamental types: Deva (divine — gentle, refined, idealistic), Manushya (human — pragmatic, balanced, worldly), and Rakshasa (demonic — intense, independent, unconventional). Same gana match: 6 points. Deva-Manushya: 5 points. Manushya-Rakshasa: 1 point. Deva-Rakshasa: 0 points. Despite the loaded terminology, Rakshasa gana is not negative — it simply indicates a more forceful, self-determined temperament. Gana mismatch often manifests as clashing lifestyles and social preferences.

7. Bhakoot (7 Points) — Emotional Compatibility

Bhakoot (BHAH-koot) examines the relationship between the two Moon signs by counting the distance between them. Certain combinations are considered adverse: 2/12 (Dvir-Dwadasha dosha — financial difficulties), 6/8 (Shadashtak dosha — health and conflict issues), and 5/9 (debatable — some traditions consider this inauspicious, others favorable). When none of these adverse patterns are present: 7 points. When adverse: 0 points. Bhakoot dosha is taken seriously because it colors the overall emotional dynamic of the partnership.

8. Nadi (8 Points) — Health and Genetic Compatibility

Nadi (NAH-dee) is the highest-weighted single factor. Each nakshatra belongs to one of three nadis: Aadi (Vata — air), Madhya (Pitta — fire), or Antya (Kapha — water). When both partners share the same nadi: 0 points and Nadi Dosha is declared. Different nadis: 8 points. Nadi dosha is considered the most serious defect in Ashtakoota matching — classical texts associate same-nadi marriages with health problems for progeny and fundamental physiological disharmony. Some traditions recognize exceptions (same nakshatra but different rashi, or same rashi but different nakshatra).

graph TD
    AK["Ashtakoota Milan<br/>36 Points Total"] --> V["1. Varna<br/>Spiritual — 1 pt"]
    AK --> Va["2. Vashya<br/>Attraction — 2 pts"]
    AK --> T["3. Tara<br/>Destiny — 3 pts"]
    AK --> Yo["4. Yoni<br/>Physical — 4 pts"]
    AK --> GM["5. Graha Maitri<br/>Mental — 5 pts"]
    AK --> G["6. Gana<br/>Temperament — 6 pts"]
    AK --> B["7. Bhakoot<br/>Emotional — 7 pts"]
    AK --> N["8. Nadi<br/>Health — 8 pts"]

flowchart TD
    Start["Two Birth Charts"] --> Moon["Extract Moon Nakshatra<br/>& Moon Sign"]
    Moon --> Eight["Evaluate 8 Kootas"]
    Eight --> Score["Sum Points / 36"]
    Score --> Check{"Score >= 18?"}
    Check -->|Yes| Dosha["Check for Nadi,<br/>Bhakoot & Kuja Dosha"]
    Check -->|No| Caution["Unfavorable —<br/>Deeper analysis needed"]
    Dosha --> Synastry["Full Chart Synastry:<br/>7th lord, Venus, Jupiter,<br/>Navamsha, Dasha alignment"]
    Synastry --> Result["Complete Compatibility<br/>Profile"]

Interpreting the Score

The maximum Ashtakoota score is 36 points. General thresholds in traditional practice:

28–36: Excellent compatibility — marriage strongly recommended
21–27: Good compatibility — marriage favorable with minor considerations
18–20: Average compatibility — generally acceptable but specific dosha analysis needed
Below 18: Traditionally considered unfavorable — further analysis or remedial measures advised

However, raw scores can mislead. A score of 25 with Nadi Dosha is treated more cautiously than a score of 20 with no major dosha. Experienced practitioners weigh the pattern of which kootas scored well, not just the total.

Beyond Ashtakoota: Full Chart Synastry

Ashtakoota uses only the Moon’s nakshatra and sign — a fraction of the chart. Thorough compatibility analysis examines:

7th house and its lord in both charts — the house of partnership. Its condition reveals each person’s relationship orientation, expectations, and patterns.
Venus (Shukra) — significator of love, romance, and marital harmony. Venus dignity and aspects shape how each person gives and receives affection.
Jupiter (Guru) — significator of husband in a woman’s chart (traditional) and of wisdom, growth, and dharma in partnership. Jupiter’s condition indicates the quality of guidance and expansion the relationship provides.
Mars and Mangal Dosha — Mars in the 1st, 2nd, 4th, 7th, 8th, or 12th house creates Kuja Dosha (KOO-ja DOH-sha). When one partner has it and the other does not, the mismatch is traditionally considered problematic. Severity varies by house and sign — Mars in its own sign or exalted mitigates the dosha considerably.
Navamsha (D-9) chart — the divisional chart specifically tied to marriage. Navamsha analysis often reveals deeper compatibility patterns invisible in the rashi chart.
Dasha alignment — whether both partners are running compatible planetary periods. Two people may be fundamentally compatible but meet during challenging dasha periods, altering how the relationship unfolds.

Vedtara’s Compatibility Analysis

Vedtara computes the full Ashtakoota score with individual koota breakdowns, flags specific doshas (Nadi, Bhakoot, Kuja), and extends the analysis into full chart synastry — comparing 7th house lords, Venus and Jupiter placements, navamsha overlays, and dasha timing. The result is a layered compatibility profile that moves well beyond a single number, helping you understand where a relationship is naturally strong and where conscious effort may be needed.

See also: The 12 Rashis for Moon sign foundations, Nakshatras for the star-based layer underlying Ashtakoota, The 12 Bhavas for understanding the 7th house of partnership, and The 9 Grahas for the planetary significators of love and marriage.