Guna Milan, what it scores and what it leaves out
How the eight kootas are weighted, why 18 out of 36 became the conventional threshold, and what the system was designed to assess.
Last reviewed · 1,402 words
In short
- Guna Milan scores eight kootas out of 36 points. Nadi alone carries 8 and Bhakoot 7, so two categories are nearly half the total.
- 18 out of 36 is the conventional minimum. It is a convention within the tradition, not a rule with an external basis.
- The score is computed from the birth nakshatra of each person, which comes from the Moon's position at birth.
- Nadi dosha and Bhakoot dosha can be cancelled under several classical conditions, which astrologers apply variously.
- It assesses a chart, not two people. Nothing in it observes how a couple actually treats each other.
Ashtakoot Guna Milan is the horoscope matching system used across much of North India. It compares two birth charts across eight categories and produces a score out of 36.
The eight kootas
Each koota carries a different weight, and the weighting is where most of the outcome is decided.
| Koota | Points | What it is said to assess |
|---|---|---|
| Varna | 1 | Spiritual compatibility and temperament |
| Vashya | 2 | Mutual influence and attraction |
| Tara | 3 | Health and wellbeing |
| Yoni | 4 | Physical and sexual compatibility |
| Graha Maitri | 5 | Mental compatibility and friendship |
| Gana | 6 | Temperament and behaviour |
| Bhakoot | 7 | Love, and family prosperity |
| Nadi | 8 | Health and progeny |
| Total | 36 |
Nadi and Bhakoot together carry 15 of the 36 points — nearly 42% of the score in two categories. A match failing both loses more than a third of the total regardless of how well it does everywhere else, which is why those two dominate the outcome in practice.
Everything is computed from each person's birth nakshatra — one of 27 lunar mansions — determined by the Moon's position at the moment of birth. An accurate birth time is therefore essential; an error of a couple of hours can move the nakshatra and change the score substantially.
The 18-point threshold
| Score | Conventional reading |
|---|---|
| Below 18 | Not recommended |
| 18–24 | Acceptable |
| 25–32 | Good |
| 33–36 | Excellent |
18 out of 36 — exactly half — is the conventional minimum, and it is worth being clear that it is a convention within the tradition rather than a threshold derived from anything measurable.
A perfect 36 is rare and, in some classical readings, considered less desirable than a high but imperfect score, on the reasoning that complete similarity leaves no complementarity.
The doshas and their cancellations
Two categories are treated as more serious than a low score elsewhere.
Nadi dosha occurs when both people share the same Nadi — Aadi, Madhya or Antya — losing all 8 points. Classically it is said to affect health and progeny.
Bhakoot dosha occurs at certain distances between the two Moon signs, losing all 7 points.
Both have recognised cancellation conditions in the classical texts. Nadi dosha is commonly held not to apply where the two share the same Moon sign but different nakshatras, or the same nakshatra but different padas, or where the birth nakshatras are the same and the Moon signs differ. Bhakoot dosha has its own set, including where the lords of the two Moon signs are the same planet or are mutually friendly.
Different astrologers apply these differently, which is why two consultations on the same pair of charts can produce different advice. That variation is a feature of the practice rather than an error in it.
Mangal dosha
Separate from Guna Milan and frequently more consequential in practice.
Mangal or Manglik dosha is present when Mars occupies the 1st, 2nd, 4th, 7th, 8th or 12th house from the ascendant, the Moon or Venus, depending on which tradition is followed. The convention is that a Manglik should marry another Manglik.
Prevalence is high — estimates commonly run above 50% of charts under the broader definitions — which itself suggests how loosely the condition is drawn. Numerous cancellation conditions exist, including Mars in its own sign, Mars in the 7th house in Cancer or Capricorn, and various aspects from Jupiter.
Because it sits outside the 36 points, a chart can score well on Guna Milan and still be objected to on Mangal dosha, which is a common source of confusion for families expecting the score to settle the matter.
Where this comes from, and where it does not apply
The Ashtakoot system is set out in classical Jyotisha texts and has been in continuous use for centuries. It is a genuine part of Indian intellectual history alongside the astronomical work — the Surya Siddhanta and Aryabhata's calculations — that shares its vocabulary.
It is also regional. South Indian traditions use Dashakoot, a ten-factor system with different weightings. Many communities do not use horoscope matching at all. Kerala, Bengal and parts of the North-East follow their own conventions, and Indian Muslim, Christian, Sikh, Parsi and Jewish communities have entirely different traditions.
Anyone treating a 36-point score as a universal Indian standard is generalising from one regional practice.
What it does not assess
The score is computed from two birth times. It observes nothing about the people.
It does not know whether they have met, whether they can hold a disagreement without contempt, whether they want the same things from a decade, how either behaves under stress, or whether either is kind.
The research on relationship stability is consistent about what does predict it: how conflict is handled, the ratio of positive to negative interaction, whether repair attempts are made and accepted, and agreement on the recurring practical questions — money, children, family obligations, division of work.
Longitudinal studies observing couples discuss a disagreement report predictive accuracy above 90% for eventual separation, based entirely on the interaction. Nothing comparable exists for chart matching, and the difference in what is being observed explains why.
How to hold both
For many Indian families the score is a real part of the process, and dismissing it does not help anyone navigating it.
A workable position: treat the score as one input among several and not as a veto. A low score that a family finds troubling is worth a second consultation, since cancellation conditions are applied variously and a different astrologer may read the same charts differently.
Where a score is being used to prevent a match that both people want, the conversation that matters is with the family rather than with the chart. Where a high score is being used to press a match one person is unsure about, the same applies in reverse.
And whatever the score says, the questions that predict the outcome are answerable directly: how does this person handle being disagreed with, what do they expect of a marriage, and do they listen.
What the birth details need to be
The whole calculation depends on the Moon's position at birth, which moves about 13 degrees a day — roughly one nakshatra every day.
Date is straightforward. Time matters considerably: the Moon crosses a nakshatra boundary at a specific moment, and a birth recorded to the nearest hour can fall either side of it. Place matters because the calculation is done in local time converted to a universal instant.
Where a birth time is unknown or recorded loosely — which is common for older births in India, where the time on a certificate is often the time of registration — the resulting nakshatra is uncertain and so is everything computed from it.
Astrologers use birth time rectification for these cases, working backwards from known life events to narrow the time. It is a matter of judgement rather than calculation, and two practitioners can arrive at different times.
Anyone taking a score seriously should first establish how confident the birth times are. A precise-looking 28 out of 36 computed from an approximate birth hour is a precise number resting on an imprecise input.
Where the tradition sits alongside the astronomy
Jyotisha and Indian astronomy share a history and a vocabulary, and separating them clarifies both.
The astronomical work is substantial and independently verifiable. Aryabhata calculated the length of the sidereal year to within a few minutes in the 5th century, proposed that the Earth rotates on its axis, and explained eclipses correctly as shadows rather than as mythological events. The Surya Siddhanta contains planetary models of real sophistication. The 27-nakshatra division is a practical lunar coordinate system and works as one.
The predictive claims layered onto that framework are a separate matter, and they have not been supported when tested — which is the same position as Western astrology and for the same reasons.
Holding both is not contradictory. The calculations are genuine mathematical and observational achievement; the interpretation of what a planetary position implies about a marriage is a cultural practice. A calculator can compute the first accurately while making no claim about the second.
What this calculator assumes
- The standard Ashtakoot system with the classical 36-point weighting.
- Nakshatra derived from the Moon's position, which requires an accurate birth date, time and place.
- Dosha cancellations are noted where the common conditions apply; astrologers differ on their application.
- Mangal dosha is assessed separately from the 36 points.
- This is a computation within a traditional system, presented for reference. It is not advice about a marriage.