What Is Ashtakoota? The Eight-Point Compatibility Method, and Where It Misleads
The Vedic method for comparing two charts is called Ashtakoota — literally "eight factors". It does not look at aspects between two charts the way Western synastry does. It scores eight separate things and adds them up, out of 36.
Eight factors, and the weights are not equal
The first counter-intuitive thing: the factors are not worth the same. They run from one point to eight, in order.
| Koota | Max | What it measures |
|---|---|---|
| Varna | 1 | Inner register — the level each of you operates from |
| Vashya | 2 | Who sways whom, and whether either wants to remake the other |
| Tara | 3 | Whether your fortunes lift each other or drag |
| Yoni | 4 | Instinctive and physical fit |
| Graha Maitri | 5 | Whether your minds and values run on the same frequency |
| Gana | 6 | Temperament type, and whether the two types sit well together |
| Bhakoot | 7 | Where each of you is heading, and the life each wants |
| Nadi | 8 | Constitution and daily rhythm — whether your energy cycles fit |
Look at where the weight sits. Bhakoot is seven and Nadi is eight: fifteen points between them, over 40% of the total. Yoni and Gana — the two people usually treat as decisive — come to ten together.
A system two thousand years old puts its highest weight on sleep cycles and life trajectory, and gives less than a third to the part that feels like instant recognition.
It reads the Moon only, so no birth time is needed
All eight judgements use nothing but the Moon in each chart — which nakshatra it sits in, and which sign. No ascendant, no houses, no other planets.
That has a practical consequence: an exact birth time is not required. The ascendant changes roughly every two hours and cannot be fixed without one, but the Moon spends about a day in each nakshatra, so a date is usually enough. This is why the birth time field on the synastry form here is optional.
The other consequence is that it is fully reproducible. The same two birth dates always return the same score — no randomness, and nothing that shifts if you run it again next week.
The factors do not compensate for one another
This is the real difference from Western synastry. Western synastry reads aspects, and the various factors cushion and qualify each other. Ashtakoota scores eight things separately and adds them: a zero stays a zero, and no amount of strength elsewhere buys it back.
Which means the question "are we compatible" does not strictly have an answer in this system. The only answerable question is which factors fit and which do not.
How the total is banded
| Total | Band |
|---|---|
| 28 and above | Strong fit |
| 21 and above | Good fit |
| 15 and above | Needs work |
| Below 15 | Substantial differences |
Most couples who last land between 21 and 28. Above 28 is uncommon, and below 15 does not mean a relationship cannot work — the classical texts take a dim view of it, but plenty of long relationships score low and hold because both people know exactly where the differences are.
Why the total misleads
Because the factors are unequal, a few heavy ones can carry the total on their own. Here is a real calculation:
| Koota | Score |
|---|---|
| Varna | 0 / 1 |
| Vashya | 2 / 2 |
| Tara | 1.5 / 3 |
| Yoni | 2 / 4 |
| Graha Maitri | 1 / 5 |
| Gana | 6 / 6 |
| Bhakoot | 7 / 7 |
| Nadi | 8 / 8 |
| Total | 27.5 / 36 |
27.5 points, banded "good fit", half a point short of "strong fit". But read the breakdown: Varna zero, and Graha Maitri one out of five. What pushed the total up was the two heaviest factors — Bhakoot and Nadi, fifteen points, all of them.
Put plainly: this pair fits as a household, not as two minds. The total shows none of that.
A more extreme case: a total of 22.5, banded "good fit" as well, with Varna, Yoni and Gana almost entirely lost — those three are worth eleven points together and the pair scored one. The total was held up by Bhakoot and Nadi at full marks.
Which is why this site has a hard rule
If any single factor scores below 30% of its maximum, the reading flags it separately no matter how high the total is. That rule exists precisely to catch the case above — a respectable total covering a structural problem.
The classical literature discusses this too. Some texts note that if the Ashtakoota table drops Gana, Bhakoot and Nadi — the three so-called major afflictions — the points have to be redistributed, and the standard table never handles that case. It is also why working astrologers generally hold that Guna Milan scores alone are not a sound basis for a marriage decision: it is one input among several.
How to actually use the score
- Read the breakdown first, the total second. The total is the sum of eight numbers and carries far less information than the eight.
- Watch the factors with a low percentage. A low factor tells you where things will jam, which is more useful than a band label.
- Do not treat the score as a verdict. It measures a static structural fit, not what either person is going through or willing to do.
Enter two birth dates and see the full eight-factor breakdown, free