Birth chart compatibility (synastry) calculator
Put two birth charts side by side and see where two people meet. You see each person's Moon, Venus and Mars signs, how the two Moon signs sit to each other, where each person's planets land in the other's chart, and which planets look at each other. There is no score. Every real pairing has easy places and harder ones, and a percentage would hide both.
Date and place of birth for both people. Add birth times if you know them. They give each person's rising sign and make the house overlay more exact.
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Friday · ŚukravāraThe planet of desire and beauty.What you want, and what you’ll bend to keep it.What does the compatibility calculator compare?
Everything here is worked out in the sidereal zodiac of Vedic astrology. For each person, you see:
- the Moon sign, the Venus sign and the Mars sign
- the rising sign, when a birth time is given
Classical astrology calls the Moon the mind, so the Moon comes first. It is where two people's moods and daily rhythms meet. Venus is read for desire and affection, and Mars for drive and strength.
Then the two Moon signs are compared: the same sign, or one to seven signs apart, where seven apart means opposite. You also see each sign's element (fire, earth, air or water). So you can tell whether the two Moons share a temperament or balance each other.
Family kundli: the whole family's charts side by side, not just two
What is the difference between synastry and composite charts?
Both are modern Western ways of comparing two people.
- A synastry chart keeps the two charts separate and lays one over the other. You see how each person's planets touch the other's.
- A composite chart blends the two into one new chart, built from the midpoints between each pair of planets. It is read as the chart of the relationship itself.
We do the synastry kind, with the tools of classical Vedic astrology: sidereal signs, houses counted from the rising sign, and the classical planetary aspects. That keeps each person's own chart whole.
How do houses and aspects work between two charts?
The house overlay shows where each person's Sun, Moon, Venus and Mars fall in the other person's houses. Classical Vedic astrology counts the houses from the rising sign. So when we have a birth time, we count from it. Without one, we count from the Moon sign, a long-standing practice when the time is unknown.
The aspects follow the classical rule. Every planet looks at the 7th sign from itself. Mars also looks at the 4th and the 8th, Jupiter at the 5th and the 9th, and Saturn at the 3rd and the 10th. When one person's planet looks at the other's, the two are read as being in contact.
Venus is the planet classical astrologers named for marriage. Read about it in your own chart:
Why is there no compatibility score?
Most compatibility calculators end in a percentage. Ours doesn't, on purpose. Two charts show where two people meet easily and where they pull against each other, and every real pairing has both. A number would hide the useful part: knowing where the ease is, and where the work is.
Read the result as a map of your meeting points, not a grade. Nothing on this page predicts how a relationship will go. That rests with the two people in it.
An honest Manglik check, with how common it really is
Darakaraka: the planet classical astrology reads for the spouse
The navamsa (D9), the chart classical astrology uses for marriage
Questions people ask.
Every screen, every reason, the whole reading
One complete reading for a fictional chart. Exactly what you would receive, shown openly.
Open the sample readingWhat is a synastry chart?
A synastry chart compares two birth charts by laying one over the other. It shows where one person's planets fall in the other's houses, and which planets in the two charts look at each other. Synastry is a modern Western technique. We work it out with Vedic signs, houses and aspects.
What is the difference between synastry and a composite chart?
Synastry keeps the two charts separate and compares them point by point. A composite chart merges them into one chart, made from the midpoints between each pair of planets, and reads that as the relationship. Both are modern Western methods. This calculator does synastry, so each person's own chart stays whole.
Why is there no compatibility percentage?
Because a score flattens the useful part. Every pairing has places where two people meet easily, and places where they pull against each other. The calculator shows both, so you can see where the ease is and where the work is. It describes tendencies, not an outcome.
Why are the signs different from a Western compatibility app?
Western apps use the tropical zodiac, tied to the seasons. Vedic astrology uses the sidereal zodiac, measured against the fixed stars. The two are about 24 degrees apart, so a planet can sit one sign earlier here than in a Western app. The planets are in the same place. Only the sign boundaries differ.
Do we need both birth times?
Dates and places are enough to start. Without a time, we count that person's houses from their Moon sign, a long-standing practice, and leave out their rising sign. With a time, the houses are counted from the rising sign and the overlay is more exact. If only one of you knows your time, each chart is counted its own way.
What is Moon sign compatibility?
It compares the two Moon signs: how many signs apart they sit, and which elements they belong to. Classical astrology calls the Moon the mind, and Indian matchmaking has long paid close attention to the two Moons. Here it is one layer of the comparison, shown alongside Venus, Mars, the houses and the aspects.
Two charts meet best when you know your own.
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