Kaal Sarp Dosha Calculator & Check
A geometric test, and a reputation larger than its texts.
Kaal Sarp Dosha is present when all seven classical grahas fall on one side of the Rahu–Ketu axis. Arivyah performs the test on computed positions and names which of the twelve types results.
Whether your chart has it
Rahu and Ketu are the two points where the Moon's orbit crosses the ecliptic. They are not physical bodies, and they are always exactly opposite each other — which means they cut the chart cleanly in half.
Kaal Sarp Dosha is the statement that all seven classical grahas — Sun, Moon, Mars, Mercury, Jupiter, Venus and Saturn — have landed in one of those halves, with the other empty. That is the entire condition, and it is a purely geometric test.
It is uncommon but not rare, and its reputation considerably exceeds what the classical literature supports: it does not appear in the oldest texts at all, several respected astrologers treat it as overstated, and it is frequently used to sell remedies. Arivyah reports whether the configuration is present, names the type from Rahu's house, and presents the reading as contested rather than settled.
Check for Kaal Sarp Dosha
Whether all seven grahas fall on one side of the Rahu–Ketu axis. It is a geometric condition, and it is checked here rather than described.
What it is called
Vedic astrology reached the English-speaking world through several routes, so most concepts here carry a Sanskrit name and one or two translations. They are the same thing.
- Kaal Sarp Doshaalso called Kal Sarp Yoga, Kaal Sarpa
- All seven classical grahas on one side of the Rahu–Ketu axis. Called a yoga as often as a dosha, which reflects genuine disagreement about whether it is a difficulty.
- Rahu and Ketualso called the lunar nodes, north and south node
- The two points where the Moon's orbit crosses the ecliptic. Not physical bodies. Always exactly 180° apart, which is what makes them an axis.
- The axisalso called nodal axis
- The line through Rahu and Ketu, dividing the chart into two halves of 180°. The dosha is defined entirely by which half the planets fall in.
The condition, and why it is a line rather than a house
Rahu and Ketu are not planets. They are the two points where the Moon's orbital plane intersects the plane of the Earth's orbit — the places eclipses can happen. Because they are the two ends of one line, they are always exactly opposite each other in the zodiac, and that is unlike any real body.
That opposition means they cut the chart cleanly in half. Kaal Sarp Dosha is the observation that all seven of the classical grahas have landed in one of those halves, leaving the other empty of everything except one node.
The imagery in the name is a serpent — kaal sarp, the serpent of time — with Rahu as the head and Ketu as the tail, and the planets described as caught between them. That is the metaphor the tradition uses to explain the reading. The test itself is purely geometric and Arivyah performs it on computed longitudes rather than by eye.
Some care is needed at the boundary. A planet within a degree or two of Rahu or Ketu is arguably on the axis rather than on either side, and schools differ on how to count it. Arivyah applies the strict test and reports the actual positions so a near-miss is visible as a near-miss.
The twelve types, named by Rahu's house
Reporting only that the configuration is present is nearly useless, because the twelve variants are described quite differently. The type is set by which house Rahu occupies, and each has a serpent name.
- chevron_rightAnant (Rahu in the 1st), Kulik (2nd), Vasuki (3rd) — read against self and body, wealth and speech, and courage and siblings respectively.
- chevron_rightShankhpal (4th), Padma (5th), Mahapadma (6th) — home and mother, children and learning, health and adversaries.
- chevron_rightTakshak (7th), Karkotak (8th), Shankhachur (9th) — partnership, longevity and upheaval, fortune and belief.
- chevron_rightGhatak (10th), Vishdhar (11th), Shesha (12th) — career and standing, gains and networks, loss and release.
- chevron_rightWhat the naming does not tell you — the type names a theme, not an outcome. Tradition reads it against the strength and dignity of the planets involved, and a configuration with well-placed grahas is not read the same way as one with afflicted ones.
Being honest about this one
Kaal Sarp Dosha deserves a plainer treatment than it usually gets, in both directions.
It is not in the classical foundation. It does not appear in the oldest texts of the tradition and arrived considerably later, which is unusual for a configuration now described as life-defining. A number of respected astrologers treat it as overstated, and some reject it. It is also, more than most terms in this field, used to sell remedies — and descriptions written to frighten you are usually written by someone with something to sell.
That said, dismissing it outright is not Arivyah's call either. It is part of the living tradition, many practitioners use it, and a reader who has been told they have it deserves an accurate answer about whether they actually do.
So: the configuration is either present in your chart or it is not, and that is a computable fact about planetary longitudes. What it means is contested even within the tradition, and Arivyah reports it as contested rather than resolving it for you.
Where to go next
Each of these reads a different part of the same birth data, so once one is computed the rest need nothing more from you.
Generate your full Vedic birth chart
Rahu and Ketu in context, with every graha's sign, house and strength.
Check Mangal Dosha
The other widely-asked natal dosha, with its recognised cancellations.
Check whether you are in Sade Sati
A transit rather than a natal condition — a period, not a permanent feature.
See your Vimshottari dasha periods
A Rahu or Ketu period is when tradition reads nodal placements as most active.
View your Navamsa D9 chart
Where the underlying strength of the planets involved shows.
Ask about your own chart
The AI reads the computed positions and cannot invent a configuration.
Questions
What is Kaal Sarp Dosha?add
A configuration in which all seven classical grahas — Sun, Moon, Mars, Mercury, Jupiter, Venus and Saturn — fall on one side of the axis formed by Rahu and Ketu. Rahu and Ketu are always exactly opposite each other, so they divide the chart in half; the dosha is the statement that every other planet is in one of those halves and none in the other. That is the whole condition.
How common is it?add
Uncommon, but not rare. The seven grahas have to all land in one 180-degree half, and since several of them cluster near the Sun anyway, it happens more often than a naive probability would suggest — commonly cited estimates sit in the low single-digit percentages. It is considerably rarer than Mangal Dosha, which affects roughly a third of charts.
What are the twelve types?add
The type is named by which house Rahu occupies — Anant when Rahu is in the 1st, Kulik in the 2nd, Vasuki in the 3rd, and so on through twelve serpent names to Shesha in the 12th. Each carries its own traditional description of which areas of life are said to be affected. Arivyah names the type rather than reporting the bare condition, because the general description applies to nobody in particular.
Is it partial if one planet is on the other side?add
Then it is not Kaal Sarp by the strict definition, and Arivyah reports it as absent. Some schools describe a partial or 'Kaal Amrit' variation where a planet sits exactly on the axis, and there is genuine disagreement about how to treat a planet conjunct Rahu or Ketu within a degree or two. Arivyah applies the strict test and reports the positions, so you can see how near the boundary your chart is instead of taking a verdict on trust.
Is Kaal Sarp Dosha as serious as it sounds?add
Its reputation considerably exceeds what the classical literature supports. The dosha does not appear in the oldest texts at all — it is a later addition, and several respected astrologers treat it as overstated or reject it outright. It is also frequently used to sell remedies, which is worth knowing when you encounter a description of it designed to frighten you. Arivyah reports whether the configuration is present and what tradition says about it, and does not tell you it will determine your life.
Do I need an exact birth time?add
For the condition itself, not especially — whether all seven grahas fall on one side of the axis depends on their longitudes, and only the Moon moves fast enough for a small time error to matter, and then only near the boundary. For the type, yes: the type is named by Rahu's house, and houses rotate a full circle every twenty-four hours, so an hour of error can change which of the twelve you are told you have.
How this is calculated
The arithmetic, and where it stops
Every graha's sidereal longitude is computed from Swiss Ephemeris data with the Lahiri ayanamsa, including Rahu and Ketu as the lunar nodes. The nodal axis is taken as the line through them, and each of the seven classical grahas is tested for which half of the chart it falls in. The dosha is reported only when all seven are on one side.
The type is named from Rahu's house, using whole-sign houses counted from the ascendant. Because that depends on the ascendant, the type is sensitive to birth time in a way the bare condition is not — an hour of error can change it, and the chart reports the positions so a marginal case is visible.
The configuration is astronomy and checkable against any ephemeris. What it is held to mean is later classical interpretation, contested within the tradition itself, and Arivyah presents it that way rather than as an established effect.
Positions are astronomy and can be checked against any ephemeris. What a position is said to mean is astrological interpretation, and this site presents it as tradition rather than as established fact. How every chart here is calculated.
Run the test on your own chart
Computed nodal positions, the strict test, the type if present, and the surrounding chart the tradition says to read it against.