Kaal Sarp Dosha Calculator

A line drawn through the wheel

Picture the chart as a wheel with a straight line running across it from Rahu to Ketu. Every planet falls on one side of that line or the other. Most charts scatter their planets over both sides; the dosha describes the minority where the Sun, Moon, Mars, Mercury, Jupiter, Venus and Saturn all gather on the same one. Either side qualifies — the arc running forward through the zodiac from Rahu to Ketu, or the arc running on from Ketu back round to Rahu.

The engine draws the line by sign rather than by degree. It takes the seven signs from Rahu's sign to Ketu's, both included, and asks whether each of the seven planets stands in one of them; then it repeats the count starting from Ketu. A planet sharing a sign with a node is therefore inside the arc here, even when its degree lies on the far side of the node's. Practitioners who measure by degree can reach a different answer in exactly those cases.

Full form only, and two states

Some practitioners also speak of a partial form, where one planet slips outside the arc while the other six are held. Nothing of the kind is reported here: either all seven are inside, or the result is absent. The reason is practical as much as cautious. A partial form has no agreed boundary — one planet out or two, inside by sign or by degree — and a calculator that reported it would be choosing among competing definitions without telling you which.

Two states also means there is no exception path. The engine carries a list of mitigating conditions for Mangal dosha but none for this one, so a present result is not followed by reasons it might be softened. That is a limit of the check, not a claim that the tradition recognises no mitigation.

The twelve named forms

When the condition holds, the house Rahu occupies, counted from the lagna, gives the form its name. Rahu in the 1st is Ananta, the 2nd Kulika, the 3rd Vasuki, the 4th Shankhapala, the 5th Padma, the 6th Mahapadma, the 7th Takshaka, the 8th Karkotaka, the 9th Shankhachuda, the 10th Ghataka, the 11th Vishadhara and the 12th Sheshanaga.

Eight of those names belong to the great serpent kings of Puranic lore — Ananta, Vasuki, Takshaka, Karkotaka, Padma, Mahapadma, Shankhapala and Kulika — and the scheme simply assigns one to each house. The name records where Rahu sits. It does not alter whether the dosha is present, and it is the only part of the result that depends on the lagna, and so on the exact time and place of birth.

Where the idea comes from

Kaal sarp dosha is later traditional practice, now widespread in popular Indian astrology. It is not described in Brihat Parasara Hora Sastra, nor in Brihat Jataka, Saravali or Phaladeepika, which between them set out most of the combinations Indian astrology still uses. Parashara gives Rahu and Ketu their own dashas and their own results by house, but none of these texts treats the two nodes as the ends of a fence around the other planets.

The classics do contain a serpent combination, and it is a different one. Among the Nabhasa yogas, Sarpa yoga — also called Bhujanga — forms when the natural malefics occupy three kendras, and its benefic counterpart is Mala. It shares a name with kaal sarp and nothing else, and it is not what this calculator tests.

The 1961 chart: one planet over the line

In the worked example Rahu stands at 27°41′ Cancer, the 9th house from a Scorpio lagna, and Ketu at 27°41′ Capricorn, the 3rd. Counting forward from Rahu, the arc runs Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn. Four planets fill Scorpio — the Sun, Mars, Mercury and Venus — while Jupiter at 13°07′ and Saturn at 4°17′ share Capricorn with Ketu. Six of the seven are inside.

The seventh is the Moon, at 3°18′ Aquarius in the 4th house: one sign past Ketu, and 5°37′ beyond Ketu's degree. That single placement puts a planet on the far side of the axis, and the result is absent. Had the Moon stood in Capricorn with this same lagna, every planet would have been inside, and the form would have taken its name from Rahu in the 9th — Shankhachuda.

This is the chart a partial-form reading would most likely flag: six planets held, one just over the line. The page reports it as absent because the full form is the only one the engine recognises — another reason to compare conventions before comparing answers.

Common, and shared by everyone born that week

Because the nodes are always 180° apart, the condition turns on the slow planets. When Jupiter and Saturn sit in the same half, the faster planets pass through that half for weeks at a time and the Moon crosses it every month. On the sign-based count used here, roughly one chart in seven or eight carries the full form — a meaningful minority rather than a rarity.

The more telling point is that presence depends only on where the planets are, and that is the same everywhere on Earth at a given moment. Once the other six share a half, then for about a fortnight at a stretch, while the Moon travels through that half, every child born anywhere has it; only the named form, which follows the lagna, differs between them. A feature shared by everyone born across several days is one reason the tradition treats this dosha with caution.

Reading a present result

A present result says one thing: the seven planets share a side of the nodal axis, by the sign-based count described above. It says nothing about the strength of Rahu or Ketu, the dashas, or the houses the planets occupy, all of which a reading weighs before giving the combination any weight of its own, and it does not predict an event.

Traditional observances associated with it, such as worship of the nagas, belong to the tradition. This page neither recommends nor offers them, and a present result is not a reason for alarm.

What is kaal sarp yog in a kundli?

It is the arrangement in which the Sun, Moon, Mars, Mercury, Jupiter, Venus and Saturn all lie within the half of the chart bounded by Rahu at one end and Ketu at the other. Kaal means time and sarp means serpent. Kaal sarp yog, kaal sarp dosha and kalsarp dosh are spellings of the same idea, which belongs to later tradition rather than the early classics.

Is kala sarpa dosha mentioned in Brihat Parasara Hora Sastra?

No. Neither Parashara's text nor the other early classics describe it; it entered popular practice much later. The serpent-named combination the classics do give is Sarpa yoga, a Nabhasa yoga of malefics in three kendras, which has nothing to do with Rahu and Ketu enclosing the other planets.

What is partial kaal sarp dosha?

It is the label some practitioners give to a chart in which six planets lie between Rahu and Ketu and one stands outside, or in which the boundary is judged by degree rather than sign. There is no single agreed definition. This calculator does not report it: the result is present only when all seven planets lie inside the arc.

Does kaal sarp dosha depend on the time of birth?

Whether it is present depends only on the planets' positions, which are identical for everyone born at the same moment, so the place of birth does not matter and the time matters mainly when the Moon is near the edge of the arc. The named form follows the lagna, which changes through the day, so naming it does need an accurate time.

Which type of kaal sarp dosha do I have?

The type is read from Rahu's house counted from your lagna, from Ananta in the 1st to Sheshanaga in the 12th. Enter your birth details above; if the dosha is present, the result names the form. If it is absent, no form applies, whichever house Rahu happens to occupy, because the name describes the arrangement rather than Rahu alone.

Why do so many people seem to have kaal sarp dosha?

Partly because it is genuinely not rare, and partly because loose definitions widen it. With the nodes always opposite each other, the planets often gather on one side for weeks, and every chart cast in that window shares the condition. Counting partial forms as well would take in many more charts. That breadth is one reason the tradition handles it cautiously.