Ishta Devata Calculator

How the reading is built, step by step

First, your Atmakaraka (the planet ranked highest by degree — see the Atmakaraka & Darakaraka Calculator) and its Navamsa sign, the Karakamsha, are computed exactly as they are everywhere else in this engine. The Karakamsha is then treated as its own reference point, and every planet is re-housed from it — a 'Karakamsha chart'. The 12th sign from Karakamsha is where the indicator lives: a planet sitting there is read first; if none does, a planet aspecting it (using the same classical Parashari aspect rules — Mars/Jupiter/Saturn's special aspects, the 7th-house aspect for the rest) is read next; if neither applies, the classical ruling planet of that sign is used.

That indicator planet is matched to a deity using one specific, cited table rather than a blend of different sites' answers. For Mercury and Venus that table gives one unambiguous name; for the other seven planets it gives two commonly-read names each (e.g. Sun: Shiva or Rama) — that duality is the tradition's own documented answer for those planets, not this calculator hedging. A separate, simpler convention — the presiding deity of the nakshatra your Moon occupied at birth — exists in some practice but is a different technique and is not used here.

Planet to Ishta Devata: the full table

The planet in (or aspecting, or ruling) the 12th sign from your Karakamsha maps to a deity as follows. Sun: Shiva or Rama. Moon: Krishna or Gauri. Mars: Subrahmanya (Kartikeya) or Hanuman. Mercury: Vishnu. Jupiter: Rama or Vamana. Venus: Mahalakshmi. Saturn: Hanuman or Shani Bhagavan. Rahu: Durga or Kali. Ketu: Ganesha or Skanda.

Note what the table is keyed on: the planet found at the 12th from Karakamsha — not your Atmakaraka itself, and not your Moon sign or ascendant.

Common questions

Is the method used here properly sourced?

Yes — the Karakamsha/12th-house/occupant-aspect-lord procedure is attributed to Brihat Parashara Hora Shastra ch. 87 and Jaimini Sutras ch. 4. The tie-break order for multiple candidate planets was checked against two independent descriptions of the technique but, unlike the rest of the method, was not traced to a primary-text citation.

Why do some deity names show two options?

The cited table gives two commonly-read names for 7 of the 9 planets (Mercury and Venus are the exceptions, with one name each). Both are shown exactly as the source states them — that's the tradition's documented answer, not uncertainty added by this calculator.

Is this the same as a nakshatra-based Ishta Devata reading?

No — some traditions read Ishta Devata from the presiding deity of your Moon's birth nakshatra instead. That's a genuinely different, simpler technique. This calculator uses the Karakamsha method only, and the two are never mixed.

What is the Karakamsha?

The Navamsa (D9) sign occupied by your Atmakaraka planet — computed with the same D9 formula used everywhere else in this engine, so it can't silently disagree with your birth chart's own Navamsa chart.

If my Atmakaraka is the Sun, is my Ishta Devata Shiva?

Not necessarily. The Atmakaraka only fixes the Karakamsha (its Navamsa sign). The deity comes from the planet at the 12th sign from that Karakamsha — which can be any of the nine. A Sun Atmakaraka can give any deity in the table.

Does my Atmakaraka's birth-chart sign (e.g. Atmakaraka in Scorpio) decide the deity?

No. The method uses the Atmakaraka's Navamsa (D9) sign, not its sign in the birth chart (D1). The same D1 sign can fall in different Navamsa signs depending on the exact degree.

What if Rahu or Ketu is in the 12th from Karakamsha?

They count like any other planet there. Rahu points to Durga or Kali; Ketu points to Ganesha or Skanda.

Is Kula Devata the same as Ishta Devata?

No. Kula Devata is the family deity, passed down by lineage and custom, not calculated from a chart. Ishta Devata is the personal deity this method reads from your own chart. Many families worship both.