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A 36-point Guna Milan is eight table lookups and some modular arithmetic on two Moon positions. It runs in under a millisecond and costs nothing per run, which is why any complete version of it should be free — and why a paywalled score is worth questioning.
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Why the full 36-point calculation costs nothing to run, what the paywall is usually hiding, and the parts no price can buy.
"Free kundli matching" is one of the most searched phrases in Indian astrology and one of the least examined. The useful question is not whether a tool is free but what the word is covering: the full calculation, a teaser of it, or a number that was never really computed.
Start with the economics, because they are unusually clear here. Ashtakoot is not an expensive computation. It reads two Moon positions, performs eight lookups against fixed classical tables, and adds up the results. There is no model to run, no API to call, no per-user cost that scales. Once the ephemeris is in place, the ten-thousandth match costs the same as the first: nothing.
That has a direct consequence. If a site computes all 36 points and then charges to reveal them, it is not charging for the computation — the computation already happened. It is charging for the reveal. Knowing that changes what you are looking at when you hit a paywall halfway through a result.
If any of these is missing or blurred, the tool is gating the result rather than the work.
The full breakdown is the test. A total alone is easy to show and tells you least; the eight individual koota scores are what let you see where the points went, and they are no more expensive to display. A tool that shows "25/36" and hides the rows has made a product decision, not a technical one.
The doshas are the second test. Nadi, Bhakoot and Manglik are the flags that can contradict the total — a pairing can reach 28 of 36 while carrying Nadi dosha. A result that shows a comfortable number and withholds the flags is not merely incomplete; it is misleading in a specific, predictable direction.
| Element | Cost to compute | Should it be free? | Common paywall tactic |
|---|---|---|---|
| Total score out of 36 | Negligible | Yes | Usually shown — it is the hook |
| All 8 koota scores | Negligible — same lookups | Yes | Blurred or shown as a locked list |
| Nadi and Bhakoot dosha flags | Negligible — already computed | Yes | Held back, or hinted at as "1 issue found" |
| Manglik status | Negligible, but needs both birth times | Yes | Often "computed" without a birth time — see below |
| Written interpretation | Real cost — a human or a model | Reasonable to charge | Fair game |
| Astrologer consultation | Real cost — a person's time | Reasonable to charge | Fair game |
The line is between the calculation and the counsel. The arithmetic is free to run and should be free to see; a person's time is not.
Not a paywall. A number produced from inputs that cannot produce it.
The more serious failure is not withholding a result — it is manufacturing one. A tool that accepts two dates with no birth times and returns a confident 30 of 36 has done something impossible, because 21 of those 36 points are computed from the nakshatra, and the Moon changes nakshatra on very nearly every day of the year.
What has actually happened is that the tool assumed noon for both people and reported the result as certain. Sometimes that assumption is right. On the nakshatra layer it is close to a coin flip, and Nadi alone — the single largest koota at 8 points — turns on it.
The same pattern appears with Manglik, and it is worse there because the failure is silent. Manglik is measured from the Lagna, which moves a full sign about every two hours, so it is simply not computable without a birth time. Yet the natural way to write that code returns "not Manglik" when the inputs are missing — the absence of a check is indistinguishable in the output from a check that passed. We have that exact default in one of our own internal code paths, and we would rather say so than let you assume a clean line means a clean chart.
So the test that matters is not "did I pay". It is: did this tool ask for birth times, and if I did not give them, did it tell me what it could not compute?
A missing birth time is not a paid feature. If nobody recorded the hour you were born, no tool at any price can compute your nakshatra reliably or assess Manglik at all. Birth-time rectification can narrow the window from dated life events, and that genuinely is skilled work worth paying for — but it produces an estimate with a stated confidence, not a recovered fact.
Nor does money buy predictive validity. The 18 / 24 / 28 thresholds are conventions from classical and matchmaking practice, and there is no outcome dataset behind them — nobody has followed a large cohort of matched couples and measured what happened. A paid report and a free one are quoting the same unvalidated conventions.
And nothing buys the part that decides marriages. Ashtakoot compares two Moon positions using eight lookup tables. It does not know whether two people want children, agree about money, or treat each other well under pressure. A free calculation and an expensive one are equally silent on all of it.
The whole of Guna Milan, in the order the engine runs it. This is the entire cost of a "free" match.
| Step | Operation | Input needed |
|---|---|---|
| 1 | Compute both Moon longitudes from birth data | Date, time, place (Swiss Ephemeris) |
| 2 | Derive Moon sign (30° divisions) and nakshatra (13°20′ divisions) | The two longitudes |
| 3 | Varna, Vashya — sign class lookups | Both Moon signs |
| 4 | Graha Maitri — sign lords into a 7×7 friendship table | Both Moon signs |
| 5 | Bhakoot — sign distance, plus shared-ruler cancellation | Both Moon signs |
| 6 | Tara — modular counts both directions | Both nakshatras |
| 7 | Yoni — 14×14 matrix lookup | Both nakshatras |
| 8 | Gana, Nadi — 3-way group comparisons | Both nakshatras |
| 9 | Manglik — Mars house from the Lagna, plus cancellations | Both birth times (Lagna) |
| 10 | Sum the eight scores; report the flags separately | The above |
Nine lookups and a sum. No inference, no external call, no per-run cost. Step 9 is the only one that hard-requires a birth time, and steps 6 to 8 need one in practice because the nakshatra shifts daily.
One pairing, three input levels. This is what "free" reaches at each, and what an honest tool should refuse to state.
| Step | Value |
|---|---|
| Names only | Nakshatra via pada syllable → Tara, Yoni, Gana, Nadi = up to 21 of 36. Sign half unavailable. |
| Dates only | Moon signs → Varna, Vashya, Graha Maitri, Bhakoot = up to 15 of 36. Nakshatra half unavailable. |
| Dates, times and places | All 8 kootas = full 36, plus Manglik from both Lagnas. |
| Cost of each | Identical. The computation is the same lookups; only the available inputs differ. |
Input completeness, not payment, is what determines how much of the 36 a match can honestly report.
A tool showing the same confident "out of 36" figure at all three input levels is padding two of them. The first two are partial results against a smaller ceiling, and saying so is the difference between a free tool and a misleading one.
The arithmetic is as accurate as any paid version — it is the same eight lookups against the same classical tables, and it costs nothing per run. What varies is completeness of input and honesty of presentation: whether the tool asked for birth times, and whether it told you what it could not compute without them.
Usually for the interpretation rather than the calculation. The 36 points take under a millisecond and no per-user cost, so a site that computes them and then charges to reveal them is charging for the reveal. A written analysis or an astrologer's time is a genuine cost and reasonable to charge for.
The total, all eight individual koota scores, and the Nadi, Bhakoot and Manglik flags — none of which cost anything extra to display. It should also state plainly which parts it could not compute from the details you gave. A total with the breakdown hidden is the pattern to be sceptical of.
Treat its nakshatra-based results as guesses. Without a birth time the Moon's nakshatra is genuinely ambiguous on almost every date, so Tara, Yoni, Gana and Nadi — 21 of 36 points — cannot be determined, and Manglik cannot be assessed at all. A tool that returns confident figures anyway has assumed a time without telling you.
Not for the numbers. Both quote the same conventions and the same unvalidated thresholds. A paid report can be worth it for a skilled reading of the full charts — the Lagna lords, the 7th house, the dashas — but that is a different thing from the 36 points, and it is worth knowing which one you are buying.
The step list is the actual order of operations in our engine, read off the implementation. The claim that the calculation carries no meaningful per-run cost is a statement about its structure — eight fixed-table lookups and modular arithmetic, with no model inference or external call — not a marketing position.
How AskSoma computes and what we refuse to claim · Engine: Swiss Ephemeris via @asksoma/compatibility-core (calculateGunaMilan), Lahiri sidereal Moon and Mars positions · Ayanamsa: Lahiri (Chitrapaksha) · Content reviewed 2026-08-07