Love Compatibility Calculator by Date of Birth

How Love Compatibility by Date of Birth Is Calculated

The calculation is the Guna Milan, also called Ashtakoot matching: eight tests, or kootas, worth 36 points between them. Every one of them is read from the Moon at birth — four from the Moon's nakshatra (Tara, Yoni, Gana and Nadi) and four from the Moon's sign (Varna, Vashya, Graha Maitri and Bhakoot). Nothing else in the birth chart enters the score, which is why two dates can say as much as they do.

1. Scan each date. The Moon's sidereal (Lahiri) position is computed from local midnight to midnight, and every change of nakshatra or sign is found to the minute.
2. Pair every window. Each of the boy's Moon windows is matched with each of the girl's, with the same scoring function the full Kundli matching uses.
3. Weigh by time. A window covering three-quarters of the day covers three-quarters of the possible birth times, so its combinations count for that much of the result.
4. Report honestly. A score all combinations agree on is printed as a score; one they disagree on is printed as a range with the share of birth times behind each value.

Kundli Matching Without Birth Time: What Changes

Kundli matching without the birth time loses exactly the parts of a match that hang on the ascendant, and keeps the parts that hang on the Moon. The Moon moves about 13 degrees a day. A nakshatra is 13 degrees 20 minutes wide, so on almost every date the Moon changes nakshatra once; a sign is 30 degrees wide, so on roughly two dates in five it changes sign as well.

That is why this page never prints a single score it cannot stand behind. On a date where the Moon keeps one nakshatra and one sign, all eight kootas are settled and the score is exact. On a date where the nakshatra changes, Tara, Yoni, Gana and Nadi may change with it; where the sign changes, Varna, Vashya, Graha Maitri and Bhakoot may too. The table of kootas in the result marks each one either way, so you can see which part of the answer the dates have decided.

If your family knows even roughly when each of you was born — morning or evening — the windows in the result tell you which row applies, and the range usually collapses to one number. With exact times, the full Kundli matching computes the same eight kootas plus Mangal dosha and the classical cancellations.

Moon Sign Compatibility by Date of Birth

Four kootas compare the two Moon signs. Varna and Vashya describe temperament and mutual pull; Graha Maitri asks whether the planets ruling the two Moon signs are friends, which is read as ease of understanding; Bhakoot counts how far apart the two signs sit. Moon signs two, five, six, eight, nine or twelve apart in either direction form the three Bhakoot dosha axes (2-12, 5-9 and 6-8) and score zero; every other spacing scores the full seven.

The other four read the nakshatra. Tara counts the distance between the two birth stars in cycles of nine. Yoni gives each nakshatra an animal and scores the pair from natural friendship to enmity. Gana sorts the nakshatras into Deva, Manushya and Rakshasa temperaments. Nadi, the heaviest at eight points, groups them into three constitutions and scores zero when both partners share one — the Nadi dosha that families ask about first.

Guna Milan Score Bands for Marriage Compatibility

The bands below are the ones the site's full matching report uses, so a score read here means the same thing there. Classical practice treats a score below about half of 36 as a reason to look at the whole chart before deciding, and every tradition treats the number as the start of a reading rather than its conclusion.

A range that crosses a band line — 19 to 24, say — is not a weaker answer than a single number. It is the answer the dates actually support, and it tells you that knowing the birth times would change the verdict, which is itself worth knowing before anyone decides anything.

Numerology Compatibility by Date of Birth

Many people searching for compatibility by date of birth mean numerology, not the Moon. The result therefore also compares the two mulank numbers (the day of the month reduced to one digit) and the two bhagyank numbers (the whole date reduced), using the friend, neutral and enemy table from the site's numerology calculators. It is printed separately because it is a separate tradition, and the two are never added into one percentage.

Limits of Love Compatibility by Date of Birth

Guna Milan is a traditional framework, not a measurement of love and not a prediction. Couples with modest scores build good marriages and couples with high ones do not, and no calculator — this one included — knows two people. The score is best used the way astrologers use it: as a set of questions about temperament and expectations to talk through, never as a verdict on a relationship.

Three technical limits apply. The Moon is computed with the Lahiri ayanamsa, the Indian standard; a site using another ayanamsa can place a boundary a few minutes differently. Three kootas are directional, so swapping the two partners can change the score by a point or two. And the place, when given, sets only the time zone: two people born on the same calendar date in Delhi and in New York were born on different stretches of the Moon's path.

Love Compatibility by Date of Birth FAQ