A guna milan score of 18 out of 36 falls in the classical band “Acceptable”. The tradition accepts this match. Where points were lost matters more than the number.
Some context most sites won't give you: we computed every one of the 11,664 possible nakshatra-pada pairings with a real scoring engine, and 551 of them (4.7%) land on exactly 18. A score this common is not a cosmic verdict — it is a row in a table. What matters is where the points went missing.
Where the points usually go
The two heaviest kootas are nadi (8 points) and bhakoot (7). A single nadi or bhakoot dosha can drag an otherwise fine match down by a third of the total — and both have classical cancellation rules that quick calculators skip. If your 18 includes a cancelled dosha, your effective score is 26 or 25, not 18. Gana (6) and graha maitri (5) are the next heaviest; losses there are temperament questions to discuss, not doom.
What to do with this number
Tradition accepts 18/36. Check whether any points were lost to a dosha with a cancellation, then read the full charts — dasha timing and the seventh houses say more about married life than the count does. If anyone uses this number to sell you a remedy, walk away: the texts themselves don't.
Related: nakshatra & rashi compatibility guides · score 17 · score 19
This page scores the moon stars. Your real charts say more.
Names and birth stars are the shortcut. The honest answer comes from two fully computed charts — exact birth time and place, every koota, manglik for both partners, and the cancellations shown instead of hidden. Free, in one minute.
No fear-selling, no gemstone upsells — ever, by written policy.