House Systems Explained: Whole Sign vs Equal vs Placidus vs Sripati

Direct answer: The four house systems divide the sky differently: whole-sign makes each sign a house (classical Vedic default); equal-house measures 30° from the ascendant degree; Placidus uses time-based unequal divisions (Western default); Sripati is the Vedic unequal system anchored to the ascendant degree. For Vedic interpretation, whole-sign is the standard — and the only one with zero cusp ambiguity.

Houses are where planets act — the chart's twelve life-departments. But "which sign is the 7th house?" has four respectable answers, and they sometimes disagree. This guide compares the four systems that matter for Vedic astrology, shows exactly when they diverge, and gives the verdict.

The comparison table

How each system works (plain language)

Whole-sign: the sign IS the house

Find the ascendant's sign — that's the 1st house. The next sign is the 2nd, and so on around. Mars in Leo with a Taurus lagna? Leo is the 4th sign from Taurus, so Mars is in the 4th house. Period. There are no cusps to compute and no borderline cases: house = sign, always.

This is the system of the classical Sanskrit texts. When Parashara says "Mars in the 4th," he means Mars in the 4th sign from the lagna sign. kundli.site uses whole-sign as its default for exactly this reason — and because it eliminates an entire class of software bugs. (During our verification we found a house-assignment off-by-one in an earlier implementation that had generated false Mangal dosha flags; whole-sign's definitional simplicity is what makes such errors impossible by construction.)

Equal-house: 30° from your ascendant degree

Take the exact lagna degree (say 14° Taurus) and measure twelve 30° segments from it: 1st house = 14° Taurus–14° Gemini, 2nd = 14° Gemini–14° Cancer, etc. Houses are equal and cusps are trivially computed, but a planet can sit in a different house than its sign (Mars at 10° Leo with lagna 14° Taurus falls in the 3rd equal-house, though Leo is the 4th sign).

Placidus: time-based, unequal, Western

The dominant Western system divides each quadrant (ascendant–midheaven etc.) by the time a degree takes to rise. Houses are unequal — near the equator they're roughly equal; at high latitudes they distort severely (in polar regions the system breaks down entirely). It's the default of most Western software and largely irrelevant to Vedic practice, though some hybrid astrologers use it.

Sripati: the Vedic unequal system

Sripati's method (from the Jyotisha Ratnamala) builds the bhava chart around the actual lagna degree: each bhava (house) spans from 15° before to 15° after its bhava-madhya (midpoint), with the 1st bhava centered on the lagna degree. Planets near the lagna degree are strongly in the 1st bhava even if technically in the adjacent sign. The boundaries between bhavas — bhava sandhis — are considered weak zones for planets.

Sripati is the traditional answer to "but what about the exact degree?" within the Vedic framework, and it's the basis of bhava-bala (house strength) calculations and the bhava chalit chart many North Indian astrologers consult alongside the rashi chart.

When do they disagree?

Only near boundaries — but "near boundaries" happens constantly:

The dosha consequence: Mangal dosha is traditionally judged from the lagna (and Moon, and Venus) by Mars's house placement — 1st, 2nd, 4th, 7th, 8th, 12th. A Mars sitting at 29° of the 12th-sign-from-lagna with the lagna at 1° is 12th-house by whole-sign (dosha counts) but arguably 1st-bhava by Sripati (different judgment). Classical texts differ on which frame governs doshas — which is precisely why dosha analysis must show its reasoning, not just a flag. (Mangal dosha: myth vs reality)

The verdict

Our position: whole-sign as the default interpretive frame (it's what the classical definitions assume), Sripati bhava positions available for strength analysis. What matters most is not which system you choose but that the choice is stated — an unstated house system is as bad as an unstated ayanamsa.

The bhava chalit / rashi distinction (North Indian charts)

If you've seen a North Indian diamond chart with a separate "bhava chalit" — that's the Sripati-style degree-based house overlay. The rashi (whole-sign) chart shows sign placements; the chalit shows bhava placements by degree. They agree for most planets and differ near cusps. Neither is "wrong"; they answer different questions (sign dignity vs. house strength). A good calculator shows both and labels them.

Frequently asked questions

What is the difference between whole-sign and Placidus houses?

Whole-sign: each zodiac sign is a house (1st = lagna's sign). Placidus: unequal time-based divisions anchored to the ascendant and midheaven degrees. They agree when the lagna is early in its sign and diverge near cusps and at high latitudes.

Which house system is used in Vedic astrology?

Classically, whole-sign (rashi = bhava) per Parashara, with the Sripati bhava system for degree-sensitive strength analysis. Equal-house is a modern simplification some Vedic astrologers use.

What is the Sripati house system?

The classical Indian unequal house system: each bhava spans ±15° around its midpoint, with the 1st bhava centered on the exact lagna degree. Used for bhava chalit charts and house-strength (bhava bala) calculations.

Do house systems change dosha results?

They can: Mars near a house cusp may count as dosha-forming in one system and not another. This is why dosha analysis must show reasoning and cancellations, not just a binary flag.

What is bhava chalit?

The degree-based house chart (usually Sripati method) shown alongside the sign-based rashi chart in North Indian style. It answers "which house by degree?" where the rashi chart answers "which house by sign?"

Why does kundli.site use whole-sign houses?

Three reasons: it's the classical Parashari default (the frame the textual definitions assume), it has zero cusp ambiguity, and it eliminates an entire class of implementation bugs — verified during our accuracy testing.

Can I compare houses across systems myself?

Yes: note a planet's sign (whole-sign house = sign counted from lagna sign) and its exact degree vs. your lagna degree (Sripati/equal placement). Near-boundary planets are the interesting cases.

Does the house system affect dashas?

No — Vimshottari dasha is computed from the Moon's nakshatra, independent of houses. Houses affect interpretation of dasha results, not the dasha sequence itself.