What is the Cusp Chart?
The cusp chart is a chart diagram drawn from the positions of the twelve house cusps rather than from the sign placement of the planets. In an ordinary birth chart, a planet is shown in the sign it occupies, and the houses are assumed to follow the signs. In a cusp chart, each house is placed according to the actual degree at which it begins, so the diagram reflects where the houses genuinely fall along the ecliptic at the moment and place of birth.
The distinction matters because in Krishnamurti Paddhati a house is a measured span of space, not a sign. Since KP divides the houses by the Placidus method, the twelve houses are unequal in size and their boundaries rarely coincide with sign boundaries. In 4 Step the cusp chart is presented alongside the conventional chart so that the two ways of assigning a planet to a house can be compared directly.
How a Cusp Chart Differs from a Planetary Chart
A conventional Vedic chart answers the question "which sign is this planet in?" and derives the house from that. A cusp chart answers "which measured house span does this degree fall into?" The two answers can differ. A planet at 28 degrees of a sign may sit in the same sign as the fourth cusp yet fall past that cusp's boundary, placing it in the fifth house by cuspal reckoning while a whole-sign reading keeps it in the fourth.
KP resolves such cases in favour of the cusps. The rule is that a planet belongs to the house whose cusp it has passed but whose following cusp it has not yet reached. This is sometimes called bhava occupancy by longitude, and it is the reason KP charts and traditional charts occasionally disagree about a planet's house even when they agree perfectly about its sign and degree.
Because the cusps depend on the latitude of the birthplace, the cusp chart is genuinely local. Two births at the same instant in cities at different latitudes share identical planetary longitudes but produce different cusp charts. The conventional sign-based chart cannot express that difference.
What the Cusp Chart Shows
- Cusp longitudes — the exact degree, minute and second at which each of the twelve houses begins.
- Sign of each cusp — which sign the house beginning falls in, and therefore its sign lord.
- Star lord of each cusp — the nakshatra lord of that degree, drawn from the 27 nakshatras and their Vimshottari rulers.
- Sub lord of each cusp — the ruler of the sub division within that nakshatra, which KP holds to be the deciding factor.
- Planets falling within each house span — assigned by longitude rather than by sign.
- Intercepted signs — signs entirely contained inside a house without ruling any cusp, and duplicated sign lordships where a sign rules two cusps.
Reading the Chart in Practice
The cusp chart is not usually read in isolation. It supplies the geometry; the judgement comes from combining it with the significator tables. A practitioner examining a question about profession, for instance, would locate the tenth cusp in the diagram, note its sub lord, then check whether that sub lord signifies the houses relevant to career before consulting the running dasha for timing.
The sub layer is what gives the chart its resolution. Each of the 27 nakshatras is divided into nine subs in the Vimshottari order, sized in proportion to the dasha years — Ketu 7, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19, Mercury 17. Subs are therefore unequal, and a cusp can shift from one sub to the next within a couple of minutes of birth time. Cusp charts are for that reason drawn only from a birth time the practitioner is reasonably confident in.
All KP cusp figures are computed on the sidereal zodiac using the KP ayanamsha. If you compare a cusp chart produced with a different ayanamsha setting, expect every cusp to be displaced by the difference between the two values; the ayanamsha calculator shows the gap for any given date. The numeric cusp positions behind the diagram are listed on the cusp table page.
North Indian and South Indian Layouts
The cusp chart can be drawn in either the North Indian diamond format, where the houses are fixed and the signs move, or the South Indian square format, where the signs are fixed and the Ascendant is marked. The underlying data is identical; only the presentation differs. In 4 Step the format is a display preference and does not affect any calculation, sub lord or significator result.
Frequently Asked Questions
Is the cusp chart different from my normal birth chart?
It uses the same birth data and the same planetary longitudes, but it places the houses at their calculated cusp degrees instead of aligning them with signs. Most planets land in the same house in both versions; planets close to a cusp are where the two can disagree.
Why is one of my houses much larger than another?
That is normal for Placidus division. House sizes vary with the latitude of the birthplace and the season, so unequal houses — and occasionally intercepted signs — are an expected outcome rather than a calculation fault.
Which house does a planet sitting right on a cusp belong to?
In KP the planet belongs to the house whose cusp it has already crossed. A planet a fraction of a degree before the seventh cusp is still in the sixth house; a fraction after it, and it is in the seventh. This is one of the clearest practical differences between cuspal and whole-sign reckoning.
Do I still need the planet table if I have the cusp chart?
Yes. The cusp chart shows where the houses begin, but judgement in KP also requires each planet's own star lord and sub lord, which are listed on the planet table. The two are read together.