Full, partial, and not formed
This check counts the grahas inside the arc and reports which case applies, along with the names of any that fall outside.
| Grahas inside one arc | Rāhu → Ketu | Ketu → Rāhu |
|---|---|---|
| All 7 | Full Kāla Sarpa | Full Kāla Amṛta |
| 5 or 6 | Partial Kāla Sarpa — a reduced form, not the doṣa proper | Partial Kāla Amṛta |
| 4 or fewer | Not formed | Not formed |
A graha sitting exactly with a node counts as being on the boundary, not inside it. That is the standard reading and it is why a chart can look like Kāla Sarpa on a diagram and not satisfy the rule.
Kāla Sarpa and Kāla Amṛta — the half nobody checks
The nodes always sit opposite each other, so they always cut the zodiac into two halves. All seven grahas can be confined to either of them, and the tradition names the two cases differently.
Kāla Sarpa is the Rāhu-led form: counting zodiacally forward from Rāhu, you reach every graha before you reach Ketu. The grahas sit in the serpent's mouth, and this is the form the frightening reputation attaches to.
Kāla Amṛta — also called reverse Kāla Sarpa or Kālāmṛta — is the Ketu-led form: the grahas lie in the arc from Ketu forward to Rāhu. The confinement is identical in structure and the reading is not. Ketu leads rather than Rāhu, which turns the axis toward release rather than toward craving, and most lineages treat it as materially gentler and often as spiritually favourable.
This matters practically because a tool that tests only the Rāhu→Ketu arc reports "not present" for every Kāla Amṛta chart — roughly half of all genuinely hemmed charts. If another calculator has told you that you have Kāla Sarpa and this page names Kāla Amṛta instead, that is the distinction being drawn, not a disagreement about your planets.
What the configuration actually describes
Structurally, it is a chart with all of its energy on one side of the nodal axis. Every graha sits between the point of unappeasable desire and the point of detachment, and none stands outside that span.
What that produces is a life with a strong sense of being driven along a single track — of events having their own momentum, and of the person's own choices mattering less than they feel they should. That is the honest reading, and it is quite different from the catastrophe the term is usually used to sell.
It says nothing specific about marriage, money or lifespan, despite being routinely invoked for all three. Those are read from their own houses and lords, and a chart with Kāla Sarpa can be strong in every one of them.
On the remedies industry around this term
Kāla Sarpa is the single most commercially exploited term in Indian astrology, and a great deal of what is sold against it is sold on fear rather than on the classical position. The condition is not in the earliest Parāśara material at all; it enters later. It describes a distinctive concentration of the chart, not a curse, and it is not a verdict on a life. We report whether the configuration is present and what it structurally means, and we do not sell anything against it.
How this check works
Your chart is computed from an astronomical ephemeris on the Lahiri (Citrapakṣa) ayanāṁśa, and the formation rule stated on this page is tested against it directly — the same rule, not a paraphrase. Where the classical texts disagree about a condition, the page names the reading we follow.