Shadbala is Parashara’s method for measuring how strong each planet is, by adding six different kinds of strength into a single figure for each of the seven planets. Shad means six and bala means strength: the planet’s strength from its position, its direction, the time of birth, its motion, its natural rank and the aspects it receives. The total is compared with a minimum each planet is expected to reach, and the result tells an astrologer which planets are capable of delivering what they promise and which will struggle. The kundali calculator shows a Shadbala table for the seven planets. This article explains what each of the six strengths measures, how the units work, the minimum each planet needs, why retrograde planets score high, why different programs can give different totals, and how to read the numbers sensibly, with two charts from practice.
Two of the six strengths have their own articles in this series: Digbala, the directional strength, and the ideas behind motional strength in the guide to retrograde and combust planets. Planetary avasthas, which describe how readily a planet gives results, are a useful companion to the Shadbala figures.
Conventions used. Shadbala as set out in Brihat Parashara Hora Shastra, with the minimum requirements in the form most practitioners use. Positions are sidereal with the Lahiri ayanamsa. Shadbala involves many small calculations and programs differ in some of them, a point explained below, so this article gives the rules and the patterns that hold in any correct implementation rather than exact figures from one program.
Which of your planets are strong enough to deliver?
A consultation reads your Shadbala table together with dignity, avasthas and functional nature, and shows which planets can carry the dasha periods ahead and which will need support from the rest of the chart.
In this article
- What Shadbala measures
- The six strengths
- Rupas, virupas and the minimum each planet needs
- The natural order of strength
- Positional strength: sign, varga and angle
- Temporal strength: day, night, phase and hour
- Motional strength and retrograde planets
- Aspect strength
- Why programs give different totals
- Reading Shadbala in practice
- Two charts where strength and dignity disagreed
- Frequently asked questions
What Shadbala measures
Most chart factors describe what a planet will do; Shadbala describes how much force it has to do it. A planet can be well placed by sign and house and still be too weak to deliver, or badly placed and yet strong enough to push its results through. Parashara’s answer was to measure strength from six independent angles and add them, so that no single factor, dignity included, decides the matter alone.
Shadbala in astrology therefore measures capacity; it says nothing about whether the planet is kind. A strong malefic has the capacity to do what malefics do, and a strong functional malefic for a given ascendant can bring difficulties with force. The rest of the chart decides what that force is used for.
The six strengths
The six components of shad bala are measured in the same unit and simply added. The table sets out what each one measures and the main parts it is built from.
| Strength | What it measures | Main parts |
|---|---|---|
| Sthana bala (positional) | Strength from sign placement and dignity | Exaltation strength; dignity across seven divisional charts; odd or even sign and navamsa; angle; decanate |
| Dig bala (directional) | Strength from the angle of the chart occupied | 0 to 60 virupas by distance from the planet’s powerless point |
| Kala bala (temporal) | Strength from the time of birth | Day or night; lunar phase; thirds of the day and night; lords of the year, month, weekday and hour; declination; planetary war |
| Cheshta bala (motional) | Strength from speed and direction of motion | Highest when retrograde; for the Sun and Moon, taken from declination and lunar phase |
| Naisargika bala (natural) | Fixed natural strength of each planet | From 60 virupas for the Sun down to 8.57 for Saturn |
| Drik bala (aspectual) | Strength from aspects received | Benefic aspects add, malefic aspects subtract, the net divided by four |
Rupas, virupas and the minimum each planet needs
Shadbala is counted in virupas, also called shashtiamshas, sixty of which make one rupa. The chart page’s table shows totals in shashtiamshas, and shadbala rupas are simply those totals divided by sixty. Each planet has a minimum it should reach to be considered strong: the Sun 6.5 rupas (390 virupas), the Moon 6 (360), Mars 5 (300), Mercury 7 (420), Jupiter 6.5 (390), Venus 5.5 (330) and Saturn 5 (300).
Dividing a planet’s total by its minimum gives a ratio, and that ratio is the most useful single number in the table. Above 1 the planet is strong enough to deliver its promise; well above 1, it tends to dominate the chart; below 1, it needs support from dignity, aspects or dasha to give its results fully. Comparing raw totals across planets is less useful, because the minimums differ: Mercury needs 420 virupas while Mars and Saturn need only 300.
The natural order of strength
Naisargika bala, natural strength, is the one component that never changes. It ranks the planets by their natural luminosity and weight: the Sun 60 virupas, the Moon 51.43, Venus 42.86, Jupiter 34.29, Mercury 25.71, Mars 17.14 and Saturn 8.57, each a step of one seventh of 60 below the one before. The same order is used to settle ties: when two planets are otherwise equal in strength, the naturally stronger one prevails.
Positional strength: sign, varga and angle
Sthana bala is usually the largest of the six, and it is where dignity enters the calculation. Its first part, exaltation strength, runs from 60 virupas at a planet’s exact exaltation point to nothing at its exact debilitation, rising and falling evenly between them. The second, and usually the biggest, scores the planet’s dignity in seven divisional charts, the rasi, hora, drekkana, saptamsa, navamsa, dwadasamsa and trimsamsa, giving the most for mooltrikona, then own sign, then a great friend’s sign, and progressively less down to a great enemy’s.
Three smaller parts complete it. The Moon and Venus gain in even signs and even navamsas and the other planets in odd ones. Planets in kendras score most, those in the succeeding houses half as much and those in the cadent houses a quarter. And each decanate of a sign favours a different kind of planet: the first the masculine planets, the Sun, Mars and Jupiter; the second the neutral ones, Mercury and Saturn; the third the feminine ones, the Moon and Venus.
Temporal strength: day, night, phase and hour
Kala bala measures strength from the moment of birth, and it is the component that changes fastest. The Sun, Jupiter and Venus are strongest by day, peaking at noon; the Moon, Mars and Saturn by night, peaking at midnight; Mercury is strong at all hours. Lunar phase favours the natural benefics when the Moon is waxing and the malefics when it is waning. The day and the night are each divided into thirds, with a different planet strengthened in each, and Jupiter strengthened throughout. The lords of the year, month, weekday and hour of birth each receive a fixed amount, the hour lord the most.
Two more parts complete it. Ayana bala rewards a planet according to its declination north or south of the equator, and Yuddha bala shifts strength from the loser to the winner when two planets are in close planetary war. Because so many of these parts depend on the hour, kala bala is also the component most sensitive to birth-time error.
Motional strength and retrograde planets
Cheshta bala measures motion, and it applies directly to the five planets from Mars to Saturn. Retrograde motion earns the highest motional strength, which is why a retrograde planet usually scores well in Shadbala even when its sign is ordinary. That matches the classical view that a retrograde planet is intensely active, closer to the Earth and brighter, and it is one reason retrograde planets so often dominate a chart’s story.
The Sun and Moon never retrograde, so their cheshta bala is taken from other measures: the Sun’s from its declination, the Moon’s from its phase. How a program handles these two substitutions is one of the main reasons Shadbala totals differ between programs, a point taken up below.
Aspect strength
Drik bala is the only component that can be negative. It adds the strength of aspects a planet receives from natural benefics and subtracts those from natural malefics, then divides the net figure by four, so it usually moves the total by a few tens of virupas at most. It is small, but it separates two planets that are otherwise equal: a Jupiter aspected by Saturn and Mars ends up weaker than an identical Jupiter aspected by Venus and a waxing Moon.
Why programs give different totals
Shadbala involves dozens of small steps, and programs make different choices in several of them, so the same chart can show different totals in two pieces of software. The main differences are in how the Sun’s and Moon’s motional strength is handled, which house cusps are used for directional and angular strength, the method used for some divisional charts such as the hora, the precise rules for friendships across the seven vargas, and the tables used for planetary motion. The ayanamsa setting matters too.
Testing implementations turns up real errors as well. One open-source implementation we checked left the Sun’s and Moon’s motional strength out entirely, lowering both by roughly half a rupa, and let directional strength rise above its 60-virupa maximum for some planets because it did not wrap the angle. The practical rule is to compare planets within one program rather than numbers across programs, to trust the ranking and the ratios more than the decimals, and to treat differences of a few percent as noise.
Reading Shadbala in practice
The first step is the ranking: which planets clear their minimum comfortably, which barely, and which fall short. Strong planets are the ones whose dashas and significations tend to dominate the life. The second is functional nature. A strong planet ruling good houses for the ascendant delivers good results with force; a strong ruler of the sixth, eighth or twelfth delivers those houses’ results with the same force, which can mean winning competitions and disputes as easily as it can mean health or financial strain.
Two refinements help. Parashara derives from the exaltation and motional strengths a planet’s Ishta phala, its capacity for good, and Kashta phala, its capacity for harm, which separate a strong helpful planet from a strong troublesome one. And the avastha and dignity describe the form the strength takes. Shadbala is also only one quantitative system; Ashtakavarga measures strength differently, sign by sign through bindus, and the two often agree on which planets matter most.
Two charts where strength and dignity disagreed
A man with Pisces rising, details altered. Mercury, lord of his fourth and seventh houses, is exalted in Virgo in the seventh, forming Bhadra yoga, yet it falls below its 420-virupa minimum: the seventh is Mercury’s house of no directional strength, and it receives aspects from both Saturn and Mars. His Moon in Punarvasu left eight years of Jupiter’s period, then Saturn’s nineteen, and Mercury’s seventeen from twenty-seven. He is a gifted statistician who expected Mercury’s period to make his name on his own. Instead, at thirty-one, in Mercury-Venus, he co-founded a firm with a partner who handled the clients while he did the analysis, and every success of the Mercury years came through that partnership. An exalted Mercury with low Shadbala delivered, but through the seventh house it occupies rather than on its own.
A woman with Libra rising, details altered. Saturn, her yogakaraka, is retrograde and debilitated in Aries in the seventh, and yet its Shadbala is comfortably above its 300-virupa minimum: the seventh gives Saturn full directional strength and retrograde motion gives it high motional strength. Her Moon in Shatabhisha left six years of Rahu’s period, then Jupiter’s sixteen, and Saturn’s nineteen from twenty-two. She enrolled as an advocate at twenty-three, in Saturn-Saturn, opened her own practice at twenty-nine, in Saturn-Venus, with Venus her lagna lord, and at thirty-six, in Saturn-Rahu, was appointed standing counsel for a public-sector bank. A debilitated Saturn with strong Shadbala delivered steadily for nineteen years.
Neither chart could have been read from dignity alone. The first planet looked strong and was not; the second looked weak and was not.
Frequently asked questions
What is Shadbala in astrology?
Shadbala is Parashara’s measure of the six-fold strength of the planets. It adds positional, directional, temporal, motional, natural and aspectual strength into one total for each planet and compares it with a minimum the planet should reach.
What are the six strengths?
Sthana bala (position and dignity), Dig bala (direction), Kala bala (time of birth), Cheshta bala (motion), Naisargika bala (natural rank) and Drik bala (aspects received). Sthana bala is usually the largest.
How much Shadbala does each planet need?
The usual minimums are the Sun 6.5 rupas, the Moon 6, Mars 5, Mercury 7, Jupiter 6.5, Venus 5.5 and Saturn 5, where one rupa is 60 virupas. Dividing the total by the minimum gives a ratio; above 1 the planet is considered strong.
Why is my retrograde planet so strong in Shadbala?
Retrograde motion earns the highest cheshta bala, the motional strength, so retrograde planets usually score well. That fits the classical view of a retrograde planet as intensely active.
Why do different programs show different Shadbala figures?
Programs differ in how they treat the Sun’s and Moon’s motional strength, which house cusps they use, some divisional-chart methods and the ayanamsa, and some contain errors. Compare planets within one program and rely on the ranking rather than exact numbers.
Is a planet with high Shadbala always good for me?
No. High Shadbala means capacity, not benefit. A strong planet that rules difficult houses for your ascendant delivers those houses’ results with force; dignity, functional nature and the Ishta and Kashta figures show which way the strength runs.
What is the difference between Shadbala and Ashtakavarga?
Shadbala measures each planet’s total strength from six factors. Ashtakavarga scores each sign through bindus contributed by the planets and the lagna, and is used especially for transits. They answer different questions and are often read together.
Strength is one number. What it means for you takes a reading.
A consultation reads your Shadbala ranking together with dignity, avasthas, functional nature and Ashtakavarga, and shows which planets will carry the dasha periods ahead and how.