Principles of mutual compatibility
Mutual compatibility is the idea that two people's charts should be read in relation to each other, not only one at a time. Traditional methods examine the Moon signs, the nakshatras and the lords of the houses.
What it is
A balanced reading considers both charts, the areas of agreement and friction, and the practical life of the two people. The texts emphasise that no single factor decides a relationship.
How it is worked out or read
The site's tools show each chart separately. Comparing two charts is left to the user, and the limits of the method are on the limits article.
Where it appears on this site
See comparing two charts fairly and kundli milan limits.
What compatibility means in Jyotish
Compatibility in Jyotish is usually discussed for marriage, but the same principles can describe any close relationship: business partners, family members, teacher and student. The idea is that two charts can support or strain each other in recognisable ways, and that some of those ways can be described by comparing particular factors. It is a description of tendencies, not a verdict on whether two people should be together.
Mutuality: both directions count
A key principle is that compatibility is mutual. Several factors are counted from one person to the other and also back again. In bhakoot, for example, the Moon signs are counted in both directions, and certain pairs, such as six-eight or two-twelve, are judged by the relationship as a whole. In graha maitri, the lords of the two Moon signs are compared, and the friendship of each towards the other is considered. A factor that looks good from one side and poor from the other is read as mixed, not as good.
Several layers, not one number
The Ashtakoota system gives a single score out of thirty-six, which is convenient but compresses many layers into one figure. A fuller approach looks at the score's components, at the Manglik question, at the strength of each person's seventh house and Venus or Jupiter, and at the dashas both people will run in the coming years. Two couples with the same score can have very different patterns underneath. When a matching report gives only a total, ask for the component scores so that it can be read in layers.
Complementarity
Compatibility does not mean sameness. Two people with the same Moon sign share a temperament, which can be comfortable, but differences can be complementary: a steady partner and an energetic one, or a thinker and a doer. The classical tables reflect some of this, for example by scoring certain different yonis or ganas well. A reader should not assume that every difference is a problem.
Keeping people at the centre
The most important principle is that the people involved make the decision. A chart comparison can open a conversation about strengths and areas that need care, but it cannot measure love, respect, shared values or the willingness to work through difficulties. Families who use matching are best served by treating it as one input among many, and by never using it to pressure anyone into or out of a relationship.