Vimśopaka Bala Calculator — the 20-point varga strength of every graha

What Vimśopaka Bala measures — and what it does not

There are three different strength measures in Parāśara astrology, and almost every mistake made with them comes from using one to answer a question that belongs to another. They are not competing versions of the same idea. They answer three separate questions.

Vimśopaka Bala measures a graha's disposition — how kindly it is inclined toward you, and therefore how likely its agenda is to land well when its daśā arrives. A high score does not mean the planet is forceful. It means that when this planet acts, what it brings tends to be good.

Ṣaḍbala measures force in competition. When two grahas both promise the same result — a rāja yoga carried jointly by the 9th lord and the 10th lord, say — Ṣaḍbala tells you which of them will actually deliver it. It says nothing at all about whether the result is welcome.

Aṣṭakavarga bala measures cooperation — how much support a graha receives from the others in carrying out what it intends. A planet can be well disposed and forceful and still be obstructed by everyone around it.

So: read Vimśopaka to know whether a daśā will be kind. Read Ṣaḍbala to know which planet in a yoga does the work. Read Aṣṭakavarga to know whether the rest of the chart will let it. A calculator that gives you one number and calls it "planetary strength" has flattened three different questions into one.

The three strengths, side by side

Keep this distinction and Vimśopaka becomes straightforward to use.

A planet can score high on one and low on another. That is not a contradiction; it is information. A well-disposed but weak graha means good things arrive slowly and without force.

How the score is built

Each scheme assigns every division a fixed share of the twenty points. That share is the Svaviśva — what the division is worth if the graha is in its own sign there. In the Ṣaḍvarga scheme the Rāśi carries 6 of the 20 points; in the Ṣoḍaśavarga scheme it carries 3½, because fifteen other charts are dividing the same twenty points between them.

A graha rarely owns the sign it lands in. So each division is then scored by dignity: the Vargaviśva, a number from 0 to 20 based on the graha's relationship with the lord of the sign it occupies in that division — own sign at the top, debilitation at the bottom, with the compound (pañcadhā) friendship of the chart in between.

The contribution of one division is then Svaviśva × Vargaviśva ÷ 20, and the graha's Vimśopaka Bala is the sum across every division in the scheme. Because the weights of each scheme sum to exactly twenty, a graha in its own sign in every single division scores a clean 20 — the theoretical ceiling that no real chart reaches.

Vargaviśva — the dignity point values

The score a graha earns in a single division, out of 20, from its relationship with that division's sign lord.

Friendship here is the compound relationship — the permanent friendship of the two grahas adjusted by their temporary friendship in your chart — not the natural table alone. Two people with the same planet in the same sign can therefore score differently.

Svaviśva — the complete weight table for all four schemes

This is the table the whole calculation rests on, and it is rarely printed in full anywhere. Every column sums to exactly 20. A blank means the division is not part of that scheme.

Two things in this table are worth stopping on. First, in the Daśavarga scheme the Ṣaṣṭyāṁśa alone carries 5 points — more than the Rāśi (3) and the Navāṁśa (1½) put together. Parāśara is saying plainly that the D-60 outweighs the birth chart itself. Second, the Saptavarga column gives the Dvādaśāṁśa 4½ and the Navāṁśa 2½; several later texts and programs swap those two, and you will see different totals as a result. We follow the table as it stands in the text.

Parāśara's four grades

The broad reading of a finished score, given in the text itself.

The eight daśā grades — reading a period from its lord's score

For daśā work Parāśara subdivides further, naming eight grades. This is the finer instrument, and it is the reason to compute Vimśopaka at all: it converts a score into an expectation of how much of the promised good a period will actually release.

The eight names are the sage's; the percentages are the standard modern gloss on them, useful as a proportional guide rather than as a literal forecast. Read them as "how much of what this planet promises will actually come through", not as a probability.

Vaiśeṣikāṁśa — counting the good vargas

Alongside the weighted score runs a second, simpler measure: how many divisions of the scheme find the graha in a good sign at all. A "good varga" means the graha is in its exaltation sign, its mūlatrikoṇa, or a sign it owns. Count those, and the count has a name.

This is why an astrologer says a planet "is in Pārāvatāṁśa" or "has reached Śrīdhāma". They are not describing a place — they are stating that the graha occupied six, or ten, of the ten Daśavarga divisions in dignity. The names carry more weight in conversation than the raw score does, because they are absolute: no weighting, no friendship, just how many charts the planet stands tall in.

A graha with a high count is uncommon and a graha with all of them is rare enough that the classical texts treat it as a mark of exceptional destiny. The calculator shows the designation next to each score.

The Vaiśeṣikāṁśa designations in full

By number of good vargas, in each scheme. Two or more good divisions are needed before a name applies.

For the last three Daśavarga grades you will also hear Amara, Airāvata and Vaiśeṣikāṁśa — those are a later text's names for 8, 9 and 10, and in practice they are the more commonly used ones. The sage's own names are given above.

What we count as a "good varga", and one rule we deliberately leave out

The text lists four kinds of good division: the graha's exaltation sign, its mūlatrikoṇa, its own signs — and, fourth, any sign owned by the lord of a kendra counted from the Ārūḍha Lagna.

That fourth rule is generous. Depending on the chart it can bring seven or eight of the twelve signs into the "good" set, and once it does, the designations stop discriminating: nearly every graha reaches a high name. Santhanam himself sets it aside, holding that the truer strength of a planet lies in its mūlatrikoṇa, exaltation and own-sign positions.

This calculator follows that narrower reading and counts only the first three. We state it plainly rather than leaving you to wonder why our Pārāvatāṁśa count differs from another program's — if a tool gives you noticeably higher designations than these, the ārūḍha rule is the likely reason.

Two edge cases the texts handle explicitly

Both come up in almost every chart, and both are places where programs silently disagree.

The Horā (D-2) has only two lords

Every Horā belongs to either the Sun or the Moon, so five of the seven grahas can never be in their "own" Horā. The classical resolution is to treat the Sun, Mars and Jupiter as well placed in the Sun's Horā, and the remaining planets in the Moon's — with Mercury comfortable in either. Jupiter in the Moon's Horā is counted as exaltation.

The Sun and Moon own no Triṁśāṁśa

The Triṁśāṁśa divides a sign among the five tārā grahas only; the luminaries are left out of the ownership scheme entirely. The Sun can reach Aries and the Moon can reach Taurus in the D-30, but neither can ever occupy its own sign there. For those two, only exaltation applies in the Triṁśāṁśa.

How to actually use the result

Start with the daśā. Find the lord of your running mahādaśā and antardaśā and read its Vimśopaka in the Ṣoḍaśavarga scheme. A lord at Pūrṇa or above will let most of what it promises through; one down at Svalpa will hand you the same promise in a thinned, delayed, partial form. This is the single most useful reading on the page.

Then look for the split. The interesting grahas are the ones whose Ṣaḍvarga score is high and Ṣoḍaśavarga score is low, or the reverse. The Ṣaḍvarga leans on the Rāśi and Navāṁśa; the Ṣoḍaśavarga spreads across everything and gives the Ṣaṣṭyāṁśa four points. A planet that looks strong in the coarse scheme and collapses in the fine one is a planet whose promise is visible in the outer life and unsupported underneath.

Finally, cross-check before you conclude. Vimśopaka tells you a planet is well disposed; it does not tell you the planet is capable of acting. Pair it with Ṣaḍbala for that, and with the graha's house lordships for what it is actually being asked to deliver.