A family runs an online matching tool and gets 18 out of 36. Someone says that is exactly the minimum. Someone else says half marks cannot be a good marriage. A third person forwards a screenshot showing 32/36 for a different alliance and asks why theirs is lower.
The number feels precise. It is not. A 36-point score is a summary of eight different checks, and two couples with the same total can have very different results. This article explains what the points represent, where the thresholds come from, and how to read a score without overreacting to it.
The eight kootas and their points
Guna milan, the North Indian system, assigns 36 points across eight factors:
| Koota | Points | What it checks | Common weak result |
|---|---|---|---|
| Varna | 1 | Spiritual and social temperament | Low when backgrounds differ sharply |
| Vashya | 2 | Mutual influence and attraction | Low for certain rasi pairs |
| Tara | 3 | Health and destiny of the couple | Low when star distance is unfavourable |
| Yoni | 4 | Physical and marital compatibility | Low for enemy animal pairs |
| Graha Maitri | 5 | Friendship of the moon-sign lords | Low when rulers are enemies |
| Gana | 6 | Temperament and anger | Low for Rakshasa–Deva pairs |
| Bhakoot | 7 | Emotional and family harmony | Zero for 2/12, 5/9, 6/8 rasi positions |
| Nadi | 8 | Health, progeny and constitution | Zero when both have the same nadi |
Nadi carries the most weight, followed by Bhakoot and Gana. That weighting is the reason a score can fall sharply even when most factors look fine.
Where the thresholds come from
The conventional reading is:
- Below 18: insufficient. Most traditional astrologers will not clear a marriage on the score alone.
- 18 to 24: average. Workable if the important kootas are intact and no serious dosha applies.
- 24 to 30: good. This is the range most families are comfortable with.
- 30 to 36: excellent, and relatively rare.
The 18-point minimum is a convention, not a scriptural commandment. It exists because 18 is half of 36, and because the two heaviest kootas, Nadi and Bhakoot, together account for 15 points. A couple that fails both starts at a maximum of 21 before anything else is counted.
Why the same score can mean different things
Take two couples, both at 18/36.
Couple A loses points on Varna (1), Vashya (2), Tara (3) and part of Graha Maitri. Nadi, Bhakoot and Gana are intact. Their emotional and physical compatibility is reasonably strong; the weaknesses are in social temperament and star distance.
Couple B loses Nadi (8) and Bhakoot (7), and gains points elsewhere. Their total is the same, but the failures sit in the two areas traditionally linked to health, progeny and emotional harmony.
The total is identical. The reading is not. This is why any responsible report shows the koota-by-koota table, not just the final number.
The Nadi question
Nadi dosham gets the most attention, and often the most fear. The rule is simple: each nakshatra belongs to Aadi, Madhya or Antya nadi. Same nadi for both partners is considered a dosha.
What the rule does not say is that marriage is impossible. Traditional texts allow exceptions in specific cases, and many astrologers will weigh Nadi against the rest of the chart. A Nadi mismatch with strong Bhakoot, Gana and Graha Maitri, a well-placed 7th house and no dasa conflict is a different situation from a Nadi mismatch in an otherwise weak chart.
The practical point: do not stop at "Nadi dosham present". Ask which nadi, whether an exception applies, and what the rest of the chart says.
Why 36/36 is not a guarantee
A perfect guna milan score means the eight kootas lined up. It does not mean:
- Chevvai dosham is absent. Mangal dosha is calculated from the lagna, moon and Venus, which guna milan does not examine.
- Naga dosham is absent. The Rahu-Ketu axis is outside the eight kootas.
- The 7th house is strong. Guna milan compares moons; it does not read the marriage house of either chart.
- The dasha supports marriage. Timing is a separate calculation.
- The couple is compatible in real life. No score measures communication, finances, family expectations or mental health.
I have seen 34/36 couples with serious Chevvai dosham on one side, and 20/36 couples who built stable marriages. The score is a filter, not a forecast.
Tamil 10-point vs North Indian 36-point
Tamil matching scores ten poruthams out of 10. Guna milan scores eight kootas out of 36. They overlap on Yoni, Gana, Rasi/Bhakoot and Nadi, but the lists and weightings differ.
You cannot convert one to the other. A 7/10 is not 25/36. A 24/36 is not 6.7/10. If two websites give you different numbers, first check which system each is using. Tamil horoscope matching explains the 10-porutham side.
How to read a 36-point report properly
Ask five questions:
1. Which kootas failed? The total alone is not enough.
2. Did Nadi or Bhakoot fail? These carry 15 of the 36 points and the strongest traditional warnings.
3. Is there a dosha cancellation? Nadi and Bhakoot have recognised exceptions in classical texts. Ask whether any apply.
4. What do the lagna charts say? Chevvai dosham, the 7th house, the 7th lord, Venus and Jupiter all need a separate look.
5. What is the dasha timeline? A good score with an unsupportive dasha can still mean delay.
A report that answers these five is useful. A report that says "18/36, average" and stops is not.
Three realistic scenarios
Scenario 1: 18/36, Nadi intact, Bhakoot intact, Chevvai dosham on one side with a valid cancellation. The score is modest, but the structural factors are workable. This is usually a "proceed with a detailed reading" situation, not a rejection.
Scenario 2: 21/36, Nadi failed, Bhakoot intact, no cancellation. The total looks acceptable, but the heaviest single factor failed. This needs a proper Nadi assessment before anything else.
Scenario 3: 32/36, but Mars in the 7th house of the bride with no cancellation, and a dasa sandhi at the wedding time. The score is excellent, but the dosha and timing issues are real. The score does not erase them.
What to do next
If you have a score in hand, do not decide on the number alone. Run the individual poruthams, then check the doshas and the 7th house. You can start with the Tamil marriage matching calculation, which shows the ten poruthams separately, and follow it with a detailed reading if anything looks off.
And keep the score in perspective. It is a traditional checklist, refined over centuries, but it is still a checklist. The marriage is built by two people, not by a number out of thirty-six.
Frequently asked questions
Is 18 out of 36 good for marriage?
It is the conventional minimum. Whether it is acceptable depends on which kootas failed. Nadi and Bhakoot failures matter more than Varna or Vashya failures.
What is a good porutham score out of 36?
24 or above is generally considered good. 30 or above is excellent. Scores in the 18 to 24 range need a closer look at the individual factors.
Can a marriage work with less than 18/36?
Traditional practice advises against relying on the score alone in that range. Some couples with low scores consult further and proceed after a full chart reading. The decision is personal, not automatic.
Why did I get 18/36 on one site and 24/36 on another?
Different ayanamsas, panchangams, koota weightings or assumed birth times. Ask each site which method it uses.
Does 36/36 mean no problems?
No. It does not cover Chevvai dosham, Naga dosham, the 7th house or dasha timing. Those need separate checks.