Ishta Devata Calculator

The chain, link by link

The first link is the Atmakaraka: of the eight grahas ranked by the degrees they have travelled in their signs, with Rahu counted from the end of his, the one furthest along. The second is the karakamsa, the sign that planet occupies in the navamsa, the ninth-division chart in which every sign is cut into nine parts of 3°20′. Jaimini astrology treats the karakamsa as a lagna in its own right.

The third link is the twelfth sign counted from the karakamsa, the sign immediately behind it in the zodiac. The twelfth is the house of release, of what lies beyond worldly gain, and the sutras just before the deity list speak of this very sign: what benefics, malefics or Ketu placed there say about the worlds after death and about final liberation. The fourth link is the graha, or grahas, occupying that sign in the navamsa. Each one names a deity.

Which deity each graha names

The Jaimini Sutras give the list in eight terse sutras, adhyaya 1, pada 2, sutras 72 to 79. The Sun names Shiva; the Moon, Gauri, that is Parvati; Mars, Skanda, also called Kartikeya; Venus, Lakshmi; Jupiter, Sambasiva, Shiva together with Parvati. Mercury and Saturn share one sutra and one deity, Vishnu. Rahu names Durga, and Ketu names Ganesha or Skanda; the calculator prints both names for Ketu because the sutra gives both.

Brihat Parasara Hora Sastra covers the same ground in chapter 33, in its passage on the twelfth from the karakamsa, and agrees in substance for the grahas it covers. It pairs several of them with Ketu: the Sun with Ketu for Shiva, the Moon with Ketu for Gauri, Venus with Ketu for Lakshmi, Mars with Ketu for Subrahmanya, another name for Skanda. Rahu there points to Durga, and Ketu alone to Ganesha or Subrahmanya.

When more than one graha occupies the sign, every deity they name is listed, and a deity named twice is shown once.

When the twelfth sign holds no graha

With nine grahas spread over twelve navamsa signs, the twelfth from the karakamsa is often empty, and neither text gives a deity rule for that case. Parashara remarks only, while discussing expenditure, that a vacant twelfth from the karakamsa also gives good results. Practitioners have filled the gap in more than one way.

This calculator uses the sign's traditional lord: Mars for Aries and Scorpio, Venus for Taurus and Libra, Mercury for Gemini and Virgo, the Moon for Cancer, the Sun for Leo, Jupiter for Sagittarius and Pisces, Saturn for Capricorn and Aquarius. That is one stated convention among several. Others weigh the grahas aspecting the sign, or whichever influence on it is strongest, and Jaimini practice also gives Scorpio and Aquarius a second lord in Ketu and Rahu, which this calculator does not use.

The result says which basis it used, a graha in the sign or the sign's lord standing in, so a reader who follows a different convention can redo the last step by hand.

Following the example chart through the chain

Mars is the Atmakaraka, at 27°54′ of Scorpio, edging the Sun by roughly half a degree. In the navamsa Mars falls in Pisces, so the karakamsa is Pisces. Count twelve signs from Pisces and you arrive at Aquarius.

Two grahas occupy Aquarius in this navamsa: Mercury at 20°11′ and Saturn at 8°35′. They are exactly the pair that sutra 76 names together for Vishnu, so both point to one deity and the result shows Vishnu once. No convention question arises here either. Had Aquarius been empty, its lord Saturn would have stood in, and the answer would still have been Vishnu.

Notice which planets do not count. The Sun and Rahu share Pisces with Mars in the navamsa, which puts them in the karakamsa itself rather than the twelfth from it, so they take no part in this step. The Moon in Libra, Jupiter in Aries, Venus in Scorpio and Ketu in Virgo sit elsewhere in the navamsa altogether.

Conventions that change the answer

Translations of the Jaimini Sutras do not all agree on what the deity sutras refer to. Some render them as grahas joining the karakamsa itself. The sutras leading into them concern the twelfth from the karakamsa, and Parashara places the same deities explicitly in the twelfth, which is the reading this calculator follows.

A second divide is where the counting is done. Some readers carry the karakamsa sign over into the rasi chart and count the twelfth there; this calculator counts in the navamsa, where the karakamsa was found. Parashara also allows a secondary pointer, the sixth navamsa from the Amatya Karaka's, which is not computed here. And because the Atmakaraka comes from the eight-karaka scheme, a chart with Rahu in the opening degrees of a sign can have a different Atmakaraka, and so a different karakamsa, under the seven-karaka view.

The navamsa is sensitive to time as well. Each navamsa spans 3°20′, so an Atmakaraka a few minutes of arc from a boundary can cross it with a small change in the recorded birth time. The Moon, at roughly half a degree an hour, crosses a whole navamsa in about six hours; the slower planets take days or weeks.

A pointer for devotion, not a ruling

Nothing on this page assigns anyone a god. The tradition offers the result as a pointer: a form of the divine whose worship the chart is said to favour, particularly on the inward path the twelfth house stands for. It is not a prediction, a test of anyone's faith, or a reason to set aside a devotion already held.

Many families also worship a kula devata, the family deity honoured by a lineage for generations, quite independently of any birth chart. The two ideas sit comfortably side by side. A household's kula devata and an individual's ishta devata are often different, and neither tradition asks one to replace the other.

How can I find my ishta devata by date of birth?

A date alone can be enough when the Atmakaraka is a slow planet sitting well inside one navamsa, but not when it is the Moon or a planet close to a navamsa boundary, so the form asks for time and place as well. From those it finds the Atmakaraka, its navamsa sign, the twelfth sign from there and the graha in it, then reads the deity from the Jaimini list.

What is karakamsa in Jaimini astrology?

Karakamsa is the navamsa sign occupied by the Atmakaraka, the planet furthest through its sign at birth. Jaimini astrology uses it as a second point of reference beside the lagna and counts houses from it to read a person's inclinations. For the ishta devata, the sign that matters is not the karakamsa itself but the one twelfth from it.

What if no planet is in the 12th from karakamsa?

That happens often. The classical deity sutras assume an occupant, so any rule for an empty sign is a later convention. This calculator falls back on the sign's traditional lord and labels the result accordingly; other readers look at aspects or at the strongest influence on the sign. If you follow one of those, take the twelfth sign shown here and apply your own rule to it.

Is ishta devata the same as kula devata?

No. Kula devata is the deity a family or lineage has worshipped for generations, inherited rather than calculated. Ishta devata is personal, the form of the divine one individual is drawn to, and Jaimini astrology offers a chart-based pointer to it. Plenty of people honour both, and in many households the two are different deities without any conflict between them.

Which deity does Saturn indicate as ishta devata?

Vishnu. The Jaimini Sutras pair Saturn with Mercury in a single sutra and give both the same deity. Popular lists online sometimes substitute other names for Saturn; those come from later custom rather than from the sutra. Where Mercury and Saturn occupy the sign together, as in the example chart, the calculator shows Vishnu only once.

Can my ishta devata change during my life?

The chart-based pointer cannot, because it is read from the birth chart, which is fixed. Devotion is another matter. People come to a deity through family, place, teachers and experience, and the tradition has never held that a calculation should override that. Read the result as one classical suggestion about where a person's devotion may lean, not as a requirement.