Kaal Sarp Dosh Calculator — All 12 Types, With Cancellation Checks
Checks whether all seven planets really are hemmed between Rahu and Ketu, names which of the twelve types you have, and tells you honestly when the dosha is not formed instead of selling you a “partial” one.
Enter Birth Details
The twelve types are keyed to Rahu's house, so an accurate birth time is what decides which type applies.
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All seven, or none
The dosha needs every one of the seven classical planets inside the half that runs from Rahu forward to Ketu. Six is not a partial dosha. It is a chart where one planet is free, which is a different reading altogether.
Direction changes the meaning
If the planets are confined to the Ketu to Rahu half instead, the configuration is Kaal Amrit Yoga, which the tradition reads as supportive. Calculators that ignore direction can report a blessing as an affliction.
Cancellation matters
A planet sitting on the axis, Jupiter aspecting a node, or nodes in the 3rd, 6th, or 11th all reduce the effect. A formed dosha with several cancellations is not the same as a textbook one.
What is Kaal Sarp Dosh?
Kaal Sarp Dosh is formed when all seven classical planets (Sun, Moon, Mars, Mercury, Jupiter, Venus, and Saturn) fall inside the half of the zodiac that runs from Rahu forward to Ketu. The name combines Kaal, meaning time, with Sarp, meaning serpent, and the image is of the whole chart being swallowed by the serpent of time. Rahu leads the chain and every planet trails behind it.
The rule is stricter than most calculators admit. All seven planets must be inside that arc, without exception. A single planet outside it breaks the containment the entire concept rests on, which is why reporting six of seven as a "partial" dosha is not supported by the classical texts. Direction matters just as much: when the same seven planets are confined to the Ketu-to-Rahu half instead, the configuration is Kaal Amrit Yoga, which the tradition reads as broadly supportive rather than afflicting.
This calculator applies the full rule. It checks all seven planets, reports the exact degrees each one sits from Rahu so you can verify the result yourself, names which of the twelve types applies based on Rahu's house, and checks the recognised cancellation conditions that classical texts say reduce the effect. When the dosha is not formed, it tells you plainly instead of selling you a diluted version of it.
What is Kaal Sarp Dosh in Vedic astrology?
Kaal Sarp Dosh is a natal configuration in which all seven classical grahas are hemmed between the lunar nodes, Rahu and Ketu, within the 180 degree arc running from Rahu forward in zodiacal order to Ketu. Because the nodes are always exactly opposite one another, they divide the chart into two equal halves, and the dosha is declared only when one of those halves contains every planet.
The configuration is read as karmic rather than merely difficult. With the whole planetary cabinet confined to one side of the nodal axis, the chart concentrates its energy into a narrow band of experience, and the areas ruled by the empty half tend to feel inaccessible or perpetually delayed.
How do you check Kaal Sarp Dosh in a birth chart?
Locate Rahu, then measure the zodiacal distance forward from Rahu to each of the seven planets. Any planet between 0 and 180 degrees ahead of Rahu is inside the hemmed arc; anything between 180 and 360 degrees ahead lies on the Ketu-to-Rahu side. If all seven measurements fall in the first range, the dosha is formed.
A planet sitting within about a degree of either node is on the axis rather than hemmed by it, and most schools treat that as breaking the chain. Some traditions additionally require the ascendant to be inside the arc before declaring a full dosha, which is why a careful reading reports the ascendant position alongside the planetary count.
What is the difference between Kaal Sarp Dosh and Kaal Amrit Yoga?
The two configurations share identical geometry and differ only in direction. Kaal Sarp Dosh has the seven planets in the arc from Rahu forward to Ketu, so Rahu leads and the planets appear to be swallowed. Kaal Amrit Yoga has them in the arc from Ketu forward to Rahu, so the planets move away from Rahu instead of into it.
The tradition reads the second arrangement as the benign inversion of the first: effort accumulates rather than draining away. A calculator that only counts how many planets lie between the nodes, without checking which side they are on, can report a supportive configuration as an affliction.
Which types of Kaal Sarp Dosh are considered most severe?
Kulik (Rahu in the 2nd), Takshak (Rahu in the 7th), and Ghatak (Rahu in the 10th) are traditionally rated the hardest, because they place the axis on wealth and longevity, on marriage and self-worth, and on career and domestic peace respectively.
Vasuki (Rahu in the 3rd), Mahapadma (Rahu in the 6th), and Vishdhar (Rahu in the 11th) are the most workable, since Rahu in a growth house expresses through effort and competition rather than through loss. Vishdhar in particular sits on the most financially productive placement of the twelve.
How is Kaal Sarp Dosh cancelled or reduced?
Classical cancellation conditions, collectively called bhanga, include a planet conjunct either node, which interrupts the continuity of the chain; Jupiter casting its aspect onto Rahu or Ketu, the most frequently cited protection; the nodes occupying the 3rd, 6th, or 11th houses, where malefics operate constructively; and a dignified ascendant lord, which gives the constitution to carry the configuration.
A formed dosha accompanied by several of these is not equivalent to a textbook one, which is why a useful calculator grades intensity rather than returning a bare yes or no.
When is Kaal Sarp Dosh most active?
Because it is a natal configuration, Kaal Sarp Dosh is present for life rather than for a defined window. Its activity varies with timing: the Rahu and Ketu Mahadashas and Antardashas bring it forward most strongly, as do transits that contact the natal nodal axis.
Reading the configuration alongside the Vimshottari Dasha sequence is therefore more informative than the verdict on its own, since it identifies the years in which the axis is likely to produce visible events.
How the Calculation Works
From birth details to a verifiable verdict
Enter Birth Details
Date, exact time, and place. Rahu's house decides the type, so birth time matters.
Map the Nodal Axis
Rahu and Ketu are located and the zodiac is split into two halves.
Test All Seven Planets
Each planet is measured forward from Rahu to see which half it occupies.
Name the Type and Check Bhanga
If formed, the type is identified and cancellation factors are graded.
What This Calculator Does Differently
Built to avoid the usual false positives
Strict Classical Rule
All seven planets required. No inflated "partial" or "mild" verdicts.
Kaal Amrit Detected
Separates the supportive Ketu-to-Rahu inversion from the dosha itself.
All 12 Named Types
Anant through Sheshnag, keyed to Rahu's house with type-specific reading.
Cancellation Checks
Jupiter aspects, nodes on the axis, growth houses, and ascendant-lord strength.
Frequently Asked Questions
Common questions about Kaal Sarp Dosh
Related Tools
Go deeper on the nodes and their timing
Pawan Acharya · Acharya (Vedic Astrology)
Vedic Astrologer & Nadi Shastra Researcher
Pawan Acharya (Acharya Pawan Chandra) is a Vedic astrologer and Nadi Shastra researcher with over 35 years of experience. He is the author of several classical Jyotish works — including Vivaha Sutram, Samay Sutram, Phalit Sutram and Jyotish Ke Anubhoot Rahasya — and developed an original method for calculating the probable date of marriage from a person's birth details. His research has contributed to leading astrology software and journals.