Rajju porutham check for two birth stars, with vedha

Last updated 25 October 2026

Enter the bride's and groom's birth stars, or find them from dates of birth or names, to see which rajju each star belongs to and whether the pair is a vedha pair. Below the calculator: where rajju fits in porutham matching, exactly what the tool checks, and how an astrologer takes it further.

Where rajju sits in South Indian matching

In much of South India, families match horoscopes through poruthams rather than a points total. The usual list has about ten poruthams, including Dina, Gana, Mahendra, Stree Deergha, Yoni, Rasi, Rasi Adhipati, Vasya, Rajju and Vedha, though which ones are included, and in what order, changes from one region or family to another. Each one is marked as agreeing or not. No single number comes out at the end; the astrologer reads the pattern of agreements together with the two charts.

Rajju has a special standing in that list. In Tamil and Kerala practice many astrologers treat it as a porutham that should agree, and some families will not proceed without it. That makes it worth understanding precisely what the rule checks and what it leaves to judgement.

How the tool checks rajju and vedha

You can give each person's birth star directly, let the calculator derive it from a birth date (placing the Moon in the sidereal zodiac with the Lahiri ayanamsa, from an optional time and the offset from Universal Time), or take it from the opening sound of a name. A name yields a name star, which often differs from the birth star, and the result says which kind it used.

With the two stars settled, the tool makes two separate checks:

• Rajju. The five rajjus run up the body: Pada at the feet, Kati at the waist, Nabhi at the navel, Kantha at the neck and Shiro at the head. Four of them hold six stars each and Shiro holds three. Under the traditional rule, a couple whose stars share a rajju have rajju dosha.
• Vedha. Thirteen fixed star pairs are treated as obstructing each other. If the couple's two stars form one of them, Vedha does not agree. For the two pairs involving Chitra, the published lists disagree and the tool says so instead of giving a verdict.

If the input leaves more than one star open, say a birth date with no time on a day the Moon moved into a new star, the result shows the alternatives with their rajjus and tells you whether they would change the answer.

What an astrologer looks at after a same-rajju result

Practitioners who use rajju do not all read it the same way. Some distinguish whether each star falls in the ascending or the descending half of its rajju (aroha and avaroha) and treat certain combinations more leniently. Some attach a different traditional concern to each of the five rajjus. Others weigh the remaining poruthams and the strength of both seventh houses before deciding how much a same-rajju pair matters. None of these refinements is applied here, because the published accounts of them do not agree.

It also helps to know what the rule is not. It is a convention for comparing two birth stars, and the concerns tradition attaches to it are statements of that tradition rather than forecasts. A thoughtful astrologer will explain which form of the rule they follow and leave the decision with the couple and their families. Worries about health belong with a doctor.

If your families follow North Indian matching instead, the kundli matching calculator gives the 36-point score, while the Nadi dosha calculator checks the koota that North Indian families watch most closely.

Questions to ask your astrologer about rajju

• Which list of poruthams do you use, and is Rajju one you treat as essential?
• Do you read the ascending and descending parts of a rajju differently?
• Which vedha list do you follow, and what do you do with Chitra?
• How many of the other poruthams agree for us, and which ones matter most to you?
• Are you using our birth stars from the Moon at birth, or stars from our names?

Before a matching session, our guide to kundli matching consultations explains what to bring and how to prepare.

The five rajjus and the vedha pairs

Two stars in the same row of the first table share a rajju. The second table lists the obstructing pairs the tool uses, and the two pairs on which published lists differ.