Compatibility Tools

    Marriage & Compatibility Calculators

    Vedic and Western astrology each use different frameworks to assess relationship fit. Vedic compatibility is primarily a scoring system — eight categories drawn from the Moon's Nakshatra, weighted by importance and summed to 36. Western Synastry is a qualitative overlay — two charts placed on the same wheel, with every inter-chart planetary angle read for its specific dynamic. These four tools cover both traditions in full.

    The Tools

    Four calculators covering Vedic scoring, dosha analysis, divisional charts, and Western aspect overlays.

    VEDIC

    Kundali Milan — 36-Point Match

    Scores all 8 Ashtakoot koots — Varna (1pt), Vashya (2), Tara (3), Yoni (4), Graha Maitri (5), Gana (6), Bhakoot (7), Nadi (8). Flags Nadi and Bhakoot doshas and runs the classical cancellation checks.

    18 minimum · 24+ good · 32+ excellent

    VEDIC

    Mangal Dosha Checker

    Checks Mars in houses 1, 2, 4, 7, 8, 12 from Lagna, Moon, and Venus separately. Returns a "full Manglik" only if the dosha appears in at least two of those three reference points, and runs the complete classical cancellation list.

    Lagna · Moon · Venus reference points

    VEDIC

    Navamsa D9 Chart

    The ninth divisional chart (D9) reveals planetary strength that does not show up in the rashi chart. Astrologers cross-check it to see if marriage significations are reinforced or undermined at a deeper level.

    Soul-level strength check for relationships

    WESTERN

    Western Synastry Chart

    Overlays two tropical natal charts and calculates inter-chart aspects — conjunctions, trines, squares, oppositions, sextiles. Venus–Mars aspects show attraction; Saturn–Moon aspects show where discipline meets emotion.

    Tropical zodiac · Placidus houses

    The 8 Koots — How the 36-Point System Works

    Ashtakoot Guna Milan (codified in Brihat Parashara Hora Shastra) scores eight categories entirely from the Moon's Nakshatra in each birth chart. The categories are weighted in ascending order of importance — Nadi at the top, Varna at the bottom.

    8pt
    NadiConstitutional compatibility — Adi, Madhya, or Antya. Different Nadi required.
    7pt
    BhakootMoon-sign positional relationship. 6/8 and 2/12 axes create the Bhakoot dosha.
    6pt
    GanaTemperament — Deva, Manushya, or Rakshasa. Deva+Rakshasa scores 0.
    5pt
    Graha MaitriFriendship between Moon-sign lords. Determines mental and intellectual rapport.
    4pt
    YoniNakshatra animal symbol compatibility across 14 yoni pairs. Tests instinctual fit.
    3pt
    TaraNakshatra count health compatibility — counted from each partner's birth star.
    2pt
    VashyaDominance and mutual influence based on Moon-sign group.
    1pt
    VarnaBroad spiritual-social compatibility based on Moon-sign category.

    Practical note: The total score matters, but so does which koots contributed. A 24/36 where Nadi and Bhakoot are satisfied is a stronger match than a 28/36 where those two are missing and the score is carried by Varna, Vashya, and Tara. Most astrologers will not approve a match even at 18+ if Nadi Dosha is present and none of the cancellation conditions apply.

    Mangal Dosha — What the Classical Texts Actually Say

    Mangal Dosha is the most searched and most over-applied concept in Indian marriage astrology. Here is the accurate picture, drawn from classical sources.

    The Classical Formation

    Mars in houses 1, 2, 4, 7, 8, or 12 from the Lagna creates the primary Mangal Dosha. Classical screening also checks the same positions from the Moon and from Venus. A "Poorna Manglik" (full dosha) requires Mars to appear in dosha houses from at least two of these three reference points. Mars in only one reference point is treated as partial. The 8th-house placement is considered the most intense; the 2nd-house placement the mildest.

    Why Most Charts Cancel

    Classical texts list extensive cancellation conditions: Mars in its own signs (Aries, Scorpio), Mars in exaltation (Capricorn), Mars in debilitation (Cancer), Jupiter conjunct or aspecting Mars, mutual Manglik between both partners, specific ascendant-based exceptions for Aries, Cancer, Leo, and Scorpio lagnas, and several sign-house combinations. In practice, a large proportion of charts technically showing Mars in a dosha house qualify for at least one cancellation — which is why any calculator that shows only a yes/no verdict without running the cancellations is incomplete.

    Frequently Asked Questions

    Specific answers based on classical sources.

    Why do Nadi and Bhakoot matter so much in the score?
    Nadi (8 pts) and Bhakoot (7 pts) together account for 15 of the 36 total points — nearly half the system. The classical weighting reflects what the tradition considers most fundamental: biological constitution (Nadi) and the Moon-sign positional relationship that governs prosperity and wellbeing (Bhakoot). A 24/36 score where Nadi and Bhakoot are both satisfied reads as a stronger match than a 28/36 where those two koots are missing and the score comes from the lower-weight Varna, Vashya, and Tara instead.
    What exactly is Nadi Dosha and when is it cancelled?
    Nadi Dosha occurs when both partners share the same Nadi — Adi (Vata), Madhya (Pitta), or Antya (Kapha). Classical texts link same-Nadi matches to difficulties in progeny and constitutional incompatibility. It costs all 8 Nadi points, which can pull a decent score below the 18-point threshold. Classical cancellations include: both partners sharing the same nakshatra but different padas, both partners having the same rashi but different nakshatras, and specific lord-of-nakshatra combinations. Not every same-Nadi match is equally severe.
    Is Mangal Dosha as serious as matchmakers say?
    Most commercial astrologers over-apply it. The classical rule is Mars in houses 1, 2, 4, 7, 8, or 12 from the Lagna. But a full "Poorna Mangal Dosha" requires the condition to appear from at least two of three reference points: the Lagna, the Moon, and Venus. Additionally, classical texts list extensive cancellation conditions — Mars in its own signs (Aries, Scorpio), Mars exalted (Capricorn), Mars debilitated (Cancer), two Manglik charts matching each other, Jupiter conjunct or aspecting Mars, and several ascendant-specific exceptions. The 8th-house placement carries the most weight; the 2nd-house placement carries the least.
    What does the Navamsa D9 add that the main chart doesn't show?
    The rashi chart shows planetary placements; the Navamsa reveals whether those placements have structural depth. A Venus well-placed in the rashi chart but weak or debilitated in the D9 suggests relationship significations that look good on the surface but lack staying power. Conversely, a Venus in an average rashi position but exalted in the D9 shows that relationship themes will strengthen over time. Most Vedic astrologers will not give a firm marriage prediction from the rashi chart alone without also checking the D9.
    How is Western Synastry different from Kundali Milan?
    Kundali Milan produces a single numerical score from the Moon's Nakshatra position. It is fast, comparable, and focused on long-term karmic and constitutional fit. Western Synastry overlays two full natal charts and reads the inter-chart aspects planet by planet — Venus conjunct Mars, Saturn square Moon, Jupiter trine Sun. It is slower to interpret but gives a much more detailed picture of the emotional texture of a relationship: where the attraction is, where the friction is, and where the two people fundamentally support each other.

    Related

    Full Kundali Matching

    Complete compatibility report with full reading

    Western Compatibility

    Synastry + composite chart + full reading

    Planet Strength Tools

    Shadbala, Ashtakavarga, Kala Sarpa