Parivartan Yoga: Sign Exchange, Maha, Khala and Dainya

Each in the Other’s Sign (परिवर्तन योग)

Parivartan means exchange. Two grahas form it when each sits in a sign the other rules: Mercury in Libra, ruled by Venus, while Venus is in Virgo, ruled by Mercury, is the pattern. In a birth chart those two signs are two houses, so the exchange is also an exchange between the lords of two houses, and that is how the classical texts sort it.

The site’s sign table gives every sign a single ruler, and this page uses only that. Rahu and Ketu rule no sign there; the planet table notes that Rahu co-lords Aquarius and Ketu co-lords Scorpio in some reckonings, but that co-lordship is not used here, so no exchange below involves a node.

Maha, Khala and Dainya: The Three Classes

Phaladeepika sorts parivartana by the two houses whose lords exchange. If either house is a dusthana, the 6th, 8th and 12th in the site’s house table, it is Dainya. If neither is a dusthana but one is the 3rd, it is Khala. Every other pair, both houses drawn from the 1st, 2nd, 4th, 5th, 7th, 9th, 10th and 11th, is Maha. There are 66 pairs of houses in all, and counted this way 28 are Maha, 8 Khala and 30 Dainya.

The 3rd is the house that needs a separate rule. The site’s house table lists it as an upachaya and marks it “dusthana in some traditions”, because it is the 8th from the 8th. Under a scheme that counted the 3rd a dusthana, its eight Khala pairs would fall into Dainya; Phaladeepika keeps them apart, and this page does not choose between the two.

Not every pair can exchange in every chart, because a graha that rules both houses has nothing to swap with. Five grahas rule two signs each, so every ascendant has five such pairs, and 61 of the 66 are open to it. The lord-by-lord detail for any pair, ascendant by ascendant, is on the house lords pages.

The 6th and 8th, and the 2nd and 12th

Both pairs are Dainya in Phaladeepika’s scheme, and both are possible for all twelve ascendants, since the two signs never share a ruler. The 6-8 exchange puts each dusthana lord in the other dusthana, which is also the placement the Viparita Raja rule looks for; that rule and its three named forms are on the Vipreet Raja yoga page, and this page does not rank one reading above the other. The 2-12 exchange is Dainya through the 12th alone. Each placement is worked through for every ascendant on the 6th lord in the 8th and the 2nd lord in the 12th.

Every Exchange in the Sky, 2026 to 2028

Testing every pair from the Sun to Saturn against the ingress table gives the list below. None lasts more than about a month. Late 2026 has three in a row: Mercury and Venus from 6 November 2026, then the Sun and Mars from 16 November 2026, and the Sun and Jupiter from the day that one ends, 16 December 2026, to 14 January 2027. The Sun-Mercury, Sun-Saturn, Mars-Mercury, Mars-Jupiter, Mars-Venus, Mercury-Saturn, Jupiter-Venus, Jupiter-Saturn and Venus-Saturn pairs do not exchange at any point in the table.

A birth inside one of these stretches has the exchange whatever the hour; which two houses it links depends on the lagna. Some exchanges carry a debilitated graha, and the rules for when a debilitation is read as cancelled are on the Neecha Bhanga page. Kendra and trikona lords, which make up several of the Maha pairs, are the subject of Kendra-Trikona Raja yoga.

The Moon’s Exchanges

The Moon rules Cancer alone, so it exchanges with a graha only while that graha is in Cancer and the Moon is in one of the graha’s signs. The Moon reaches those signs every month; the limit is the other graha. Measured as clock time, the Moon-Jupiter exchange holds for 7.7% of 2026 and 7.3% of 2027, the largest of the set, because Jupiter spends long spells in Cancer in these years. The Sun, Mars, Mercury and Venus give 1.1%, 2.6%, 1.6% and 1.2% of 2026 respectively, and the Moon and Saturn never exchange, since Saturn is never in Cancer in the table. These are fractions of the sky’s time, not counts of people born with the yoga.

Parivartan in the Navamsa

Astrologers who work with divisional charts also look for exchanges in the navamsa, the D9. Everything on this page is computed from the rasi chart, the D1, and the site’s sign tables hold no navamsa positions for the grahas, so nothing here says whether a D9 exchange exists for any date. How the navamsa is built is explained in the D9 navamsa chart, and a full chart with its divisional placements needs the exact birth time.

Reading an Exchange

Astrologers who use the yoga read it through the two houses whose lords have exchanged, and the class name is a first sorting, not a verdict. This page states which pairs exist, how they are classed, and when the sky held them, and gives no outcome for any of them. The other combinations, with how often each comes up, are gathered in the kundli yoga list. In Hindi: परिवर्तन योग: राशि परिवर्तन, महा, खल और दैन्य.