Ṣoḍaśavarga: The Sixteen Divisions and Which Ones Carry Weight

Most people meet the divisional charts one at a time. Somebody looks up the D9 for marriage, the D10 for career, maybe the D7 for children, and each one arrives as a self-contained thing with its own page and its own list of interpretations.

What almost nobody gets told is that these belong to a single numbered scheme of sixteen, that the scheme has an explicit weighting attached to it, and that the weighting says something quite surprising about which of the sixteen the tradition actually leaned on.

I went looking for the weighting because the one-at-a-time approach kept producing contradictions. The D10 said one thing, the D1 said another, and there was no stated rule for which one wins. The rule exists. It is called vimśopaka bala, and it is the least published part of a very well published subject.

What a varga actually is

A varga is a division of a sign. Take any sign, which is thirty degrees wide, cut it into some number of equal parts, and map each part onto a sign of the zodiac by a stated rule.

A planet sitting at a particular degree falls into one of those parts, and the sign that part maps to is the planet’s position in that divisional chart.

The number in the name is the number of parts. The navāṁśa cuts each sign into nine, so each navāṁśa is three degrees twenty minutes wide. The daśāṁśa cuts it into ten, three degrees each. The ṣaṣṭyāṁśa cuts it into sixty, thirty arc-minutes each.

Notice what this means. A planet does not move when you go from D1 to D9. It sits at exactly the same degree of the same sign. The varga is a magnifying glass applied to that degree, and what changes is the resolution at which you are looking. That single sentence resolves most of the confusion people have about divisional charts.

The sixteen, named and numbered

• D1 Rāśi. The body of the chart. Everything else refines it.
• D2 Horā. Wealth and its holding.
• D3 Drekkāṇa. Siblings, courage, the capacity to act.
• D4 Chaturthāṁśa. Home, land, fixed property, fortune.
• D7 Saptāṁśa. Progeny and lineage.
• D9 Navāṁśa. Spouse, dharma, and the general strength of every planet.
• D10 Daśāṁśa. Action in the world, profession, standing.
• D12 Dvādaśāṁśa. Parents.
• D16 Ṣoḍaśāṁśa. Vehicles, comforts, and the difficulties attached to them.
• D20 Viṁśāṁśa. Spiritual practice and the form it takes.
• D24 Siddhāṁśa. Learning, formal education, acquired skill.
• D27 Bhāṁśa. Constitutional strength and weakness.
• D30 Triṁśāṁśa. Misfortunes and the shape they take.
• D40 Khavedāṁśa. Maternal inheritance in the broad sense.
• D45 Akṣavedāṁśa. Paternal inheritance and general conduct.
• D60 Ṣaṣṭyāṁśa. The finest resolution, read as accumulated karma.

Sixteen divisions, and the numbers themselves run one, two, three, four, seven, nine, ten, twelve, sixteen, twenty, twenty-four, twenty-seven, thirty, forty, forty-five, sixty. Parāśara sets out all sixteen by name in a single chapter of the Bṛhat Parāśara Horā Śāstra, chapter six in R. Santhanam’s widely used English translation, titled plainly “The Sixteen Divisions of a Sign.”

The nested groups: six, seven, ten, sixteen

The sixteen are not the only scheme. They are the largest of a nested set, and knowing the nesting tells you which divisions the tradition considered load-bearing.

The ṣaḍvarga is six: D1, D2, D3, D9, D12, D30. The saptavarga adds D7 to make seven. The daśavarga is ten: D1, D2, D3, D7, D9, D10, D12, D16, D30, D60. The ṣoḍaśavarga is all sixteen.

Read the nesting from the inside out. The divisions that appear in the smallest group are the ones that appear in every group, and they are D1, D2, D3, D9, D12 and D30.

The D9 is in all four schemes, which is one reason it earns the attention it gets, and the reasoning behind that attention is in the navāṁśa explained. The D10 does not enter until the ten-fold scheme. That is already a signal about relative importance, and the explicit weights make it much sharper.

Vimśopaka bala, the part that rarely gets published

Vimśopaka means out of twenty. Each scheme distributes twenty points across its divisions, and a planet earns a share of the points from each division depending on the dignity it holds there.

Add up what a planet earns and you get its vimśopaka score out of twenty, which is a single number expressing how well the planet holds up as you increase the magnification.

The ṣaḍvarga distribution is the one I am most confident about, and it goes: D1 six points, D2 two, D3 four, D9 five, D12 two, D30 one. Six plus two plus four plus five plus two plus one is twenty.

The sixteen-fold distribution, as Parāśara states it in chapter seven of the same edition (verses 21 to 25), runs like this.

• D1 three and a half, D2 one, D3 one, D4 half
• D7 half, D9 three, D10 half, D12 half
• D16 two, D20 half, D24 half, D27 half
• D30 one, D40 half, D45 half, D60 four

That also sums to twenty. And it contains the fact I did not expect.

What the weights are telling you

In the sixteen-fold scheme, the ṣaṣṭyāṁśa outweighs the rāśi chart. Four points against three and a half. The D60, which most readings never open, is given the largest single share, and the birth chart itself comes second.

Meanwhile the daśāṁśa, the chart the entire internet uses for career questions, is given half a point out of twenty. So is the saptāṁśa, so is the viṁśāṁśa, so is the siddhāṁśa.

The navāṁśa gets three, and the ṣoḍaśāṁśa gets two, which is four times the weight of the D10 and is a placement of emphasis I have never seen anybody defend or even mention.

I want to be careful about what this does and does not prove. Vimśopaka bala is a strength metric, and a metric’s weights answer the question the metric was built for, which here is how well a planet survives magnification.

It is not a ranking of how useful each chart is for a topic. If you want to know about profession you still look at the D10, because that is the chart built for the subject.

What the weights do tell you is where the tradition placed its confidence when it had to compress sixteen readings into one number. It placed it on the coarsest chart and the finest one, and treated the middle of the range as detail.

That is a coherent position and it is worth knowing that the tradition held it, because the modern practice inverts it almost exactly.

The D60 problem, and why the heaviest chart is the most fragile

Now the awkward part, and this is the arithmetic that made me stop and check my working.

Each ṣaṣṭyāṁśa is thirty degrees divided by sixty, which is half a degree, or thirty arc-minutes. The ascendant moves through the zodiac at an average of fifteen degrees per hour, which is a quarter of a degree per minute. So the lagna crosses a ṣaṣṭyāṁśa boundary roughly every two minutes of clock time.

Every planet’s house position in the D60 is measured from the D60 lagna. So a two-minute uncertainty in a birth time can rotate the entire ṣaṣṭyāṁśa chart by one division and move every planet in it.

The Moon is gentler, moving about thirteen degrees a day, so its own ṣaṣṭyāṁśa holds for roughly fifty-five minutes. The lagna does not have that luxury.

The chart the weighting scheme trusts most is the chart a recorded birth time can least support. Anyone who has asked a parent for a birth time and been told about the middle of the afternoon knows what that means in practice. This is not a reason to throw the D60 away.

It is a reason to state your birth time confidence before you quote a D60 result, and to treat a D60 reading built on an approximate time as an illustration rather than a finding. The same sensitivity, at coarser resolution, is why nakṣatra padas and the navāṁśa move together, and why the pada is the first thing to check when a birth time is soft.

The misreading: a varga is not a second horoscope

The most common error I see is treating a divisional chart as an independent horoscope with its own life. Somebody says their D10 shows Śani in the tenth and reads it exactly as they would read Śani in the tenth of a birth chart, with its own events and its own timing.

The classical use is narrower and more useful. A varga is a test applied to a planet. You look at whether the planet holds dignity as the magnification increases, whether it stays in the same sign as the D1, whether it lands in a friend’s sign or an enemy’s.

That is what feeds the vimśopaka score and it is what a varga was built to answer. The houses of a varga carry meaning for the topic the varga governs, and they carry it as a refinement of the birth chart rather than as a replacement for it.

Put concretely: if the D1 says nothing about a career in public life and the D10 seems to, the answer is not that the D10 overrules the D1. The answer is that the D10 is describing texture inside a story the D1 has already set the limits of.

The relationship of dignity across the divisions is set out further in exaltation and debilitation by degree, and the way a planet’s own significations get read across the vargas shows up clearly in the kārakāṁśa, which is a navāṁśa-derived reading that would make no sense as a standalone chart.

How I actually use them

My working order is short. Read the D1 properly first, because everything else is a refinement of it. Check the D9 for every planet you care about, because it is in all four schemes and it is the cheapest useful magnification. Open the topic chart for the topic in front of you.

And when the readings conflict, remember that the tradition’s own compression scheme trusted the coarse chart and the fine one, and that a conflict usually means the D1 was read too quickly rather than that the varga has found something the D1 missed.

For the strength question specifically, vimśopaka is one instrument among several and it is not the main one. Ṣaḍbala measures a different set of things and answers a different question. Running both and comparing where they disagree is a far more honest use of the machinery than picking whichever one supports the reading you already had.