Kaal Sarp dosha — the strict test, and what "partial" is worth

What this tool computes

Rahu and Ketu are not bodies. They are the two points where the Moon’s path crosses the Sun’s, and they sit exactly opposite one another, so the line between them cuts the zodiac into two halves. From your birth details this tool computes the seven grahas — Sun, Moon, Mars, Mercury, Jupiter, Venus and Saturn — and asks one question about that line. Does every one of the seven fall on the same side of it.

If all seven are hemmed into one arc, the classical condition is present. If even one sits on the far side, it is not. Either way the tool prints which grahas fall inside the arc and which outside, so the working is visible and not just the answer.

The part usually left unsaid

The test has one bit of output, and one bit cannot be returned as a fraction. What is sold as partial kaal sarp normally means that six of the seven are hemmed in and one has escaped — which is a description of the condition being absent, because a graha outside the arc is precisely the case the test was written to exclude. We compute the strict reading and label it as such. Where the answer is no, we still report how many grahas lie outside, because how near the chart came is worth knowing.

What the result does and does not mean

A present verdict states one geometric fact: at the moment and place you entered, the seven grahas were confined to one arc of the nodal axis. It is not a statement about a marriage, a livelihood or a life, and nothing this tool computes would support one. Where the condition is found, various traditions prescribe remedial rites, commonly at a nodal shrine. We can report that they are prescribed and by whom. We make no claim about what a rite accomplishes, in either direction.

One further honesty is owed. Kaal sarp is not prominent in the older matching literature, and it circulates far more widely in twentieth-century popular practice than in the classical corpus. The strict formulation is at least stated consistently wherever the category appears. The graded one is not stated anywhere we can cite.

My report said partial kaal sarp. Is this the same test?

It is the test the phrase derives from, run without the gradient. Take the report back and ask for the list: which grahas it places inside the arc and which outside. If the list reads six and one, ask how many degrees clear of the axis the seventh sits. That is a number, and it either clears the line or it does not.

Could my birth time change the answer?

Usually not. The nodes move slowly and six of the seven grahas barely shift within a day. The Moon is the exception, covering about half a degree an hour, so a badly wrong time can carry it across the axis. If the Moon is shown within a degree or two of Rahu or Ketu, confirm the birth time first.

How exact are the positions this rests on?

In our sampled JPL comparison, the largest Sun-through-Saturn disagreement was 0.44 arcseconds, and an arcsecond is a three-thousand-six-hundredth of a degree. That test does not cover the lunar nodes, so the node convention must also be checked. An edge case is a graha lying almost on the line, where traditions differ on which side to count it — a disagreement about doctrine, not about arithmetic.