Shadbala, and what a calculator can honestly do with it
On this page
- Six balas, seven planets, one ranking
- What Shadbala is
- Why five of the six are entered
- The six components
- Virupas and Rupas
- Naisargika Bala — the one constant
- Worked example: a full chart
- The required minimum
- Why Mercury fails while Venus passes
- What is carrying each planet
- Reading the component table
- Common mistakes
- Limitations
- Frequently asked questions
Six balas, seven planets, one ranking
It takes the six balas for each of the seven grahas, totals them into Shadbala Pinda, converts Virupas to Rupas, compares every planet against its required minimum, ranks all seven, and shows which component is carrying which planet.
It does not compute the balas themselves, and the section below explains at some length why not. That boundary is the most important thing on this page.
What Shadbala is
Shadbala — literally "six strengths" — is the Parashari system for measuring how much capacity a planet has to give its results. Six separate quantities are computed for each of the seven grahas, added together, and compared against a threshold that differs by planet.
The important thing to hold on to, because it is the most commonly misread part of the system, is that Shadbala measures strength, not benevolence. A malefic with a high Shadbala is conventionally read as more capable of producing its own kind of result — not as more favourable. A calculator that presented high totals as good news would be misrepresenting the tradition it claims to implement.
Why five of the six are entered
This page cannot compute five of the six balas, and rather than approximate them it asks you for them. The reason is concrete:
- Sthana Bala needs exact planetary longitudes and their positions across several divisional charts.
- Dig Bala needs longitudes and house cusps.
- Kala Bala needs sunrise and sunset for the birth moment, the length of day and night, and the weekday and hora lords.
- Cheshta Bala needs each planet's speed and whether it is retrograde.
- Drik Bala needs the aspect angles between every pair of planets.
Every one of those requires an ephemeris — a computed model of where the planets actually were. This site runs on ordinary shared hosting with no external API, no database and no astronomical library, and computing planetary positions to the precision Shadbala needs is a substantial problem in its own right.
There were three options. Compute positions approximately and present the resulting balas as real figures — which would be confidently wrong numbers in a subject where a reader cannot easily check them. Offer nothing. Or do the part that can be done correctly and ask for the rest.
The third option is what this page does. Read the five entered balas off whatever chart software or almanac you already use, and this calculator handles the totals, the conversion, the comparison against each planet's minimum, the ranking and the analysis. Nothing it reports is invented.
A useful side effect: because the page computes no positions, it works with any ayanamsha and any house system. Whatever produced your figures, the arithmetic downstream is the same.
The six components
| Bala | Meaning | Broadly |
|---|---|---|
| Sthana Bala | Positional | Strength from where the planet sits, across the main chart and the divisional charts. |
| Dig Bala | Directional | Strength from the direction, or house region, a planet favours. |
| Kala Bala | Temporal | Strength from the time of birth — day or night, the weekday, the hora, the season. |
| Cheshta Bala | Motional | Strength from the planet's apparent motion, including retrogression. |
| Naisargika Bala | Natural | A fixed amount each planet always has, by brightness order. |
| Drik Bala | Aspectual | Strength gained or lost from the aspects other planets cast on it. |
Only the fifth is a constant. The other five depend entirely on the specific chart, which is precisely why they cannot be supplied by a page that does not know the chart.
Virupas and Rupas
One Rupa is sixty Virupas. Virupa and Shashtiamsa are two names for the same unit — the specification mentions both, and they mean the same sixtieth of a Rupa.
The relationship is definitional, not a convention, so it is not a setting anywhere on this page and cannot be changed. Enter your bala figures in Virupas and the totals appear in both units, because charts are usually built in Virupas while the required minimums are traditionally quoted in Rupas.
Naisargika Bala — the one constant
Naisargika Bala is not calculated from a chart at all. The classical rule ranks the planets by apparent brightness and awards each one sixty-sevenths of a Rupa per rank:
| Planet | Rank | Virupas |
|---|---|---|
| Sun | 7 | 60.00 |
| Moon | 6 | 51.43 |
| Venus | 5 | 42.86 |
| Jupiter | 4 | 34.29 |
| Mercury | 3 | 25.71 |
| Mars | 2 | 17.14 |
| Saturn | 1 | 8.57 |
Each figure is rank × 60 ÷ 7. The Sun is 7 × 60 ÷ 7, which is exactly 60. Saturn is 60 ÷ 7, about 8.57. The ranks sum to 28, so the column always totals 28 × 60 ÷ 7 = exactly 240 Virupas, whatever the chart — a quick check that the values have not been mistyped.
The page computes these from the ratio rather than storing rounded numbers, so the derivation shown and the figures used cannot drift apart. They remain editable, in case your source rounds them differently.
Worked example: a full chart
All figures in Virupas, with the five entered balas taken from chart software:
| Planet | Sthana | Dig | Kala | Cheshta | Naisargika | Drik | Total |
|---|---|---|---|---|---|---|---|
| Sun | 120 | 50 | 90 | 45 | 60.00 | 10 | 375.00 |
| Moon | 135 | 40 | 110 | 50 | 51.43 | 15 | 401.43 |
| Mars | 95 | 55 | 70 | 40 | 17.14 | 8 | 285.14 |
| Mercury | 150 | 45 | 85 | 55 | 25.71 | 12 | 372.71 |
| Jupiter | 165 | 60 | 95 | 48 | 34.29 | 20 | 422.29 |
| Venus | 140 | 35 | 80 | 52 | 42.86 | 14 | 363.86 |
| Saturn | 105 | 30 | 65 | 38 | 8.57 | 6 | 252.57 |
| All planets | 910 | 315 | 595 | 328 | 240.00 | 85 | 2,473.00 |
The Naisargika column totals exactly 240, as it always must. The grand total is 2,473 Virupas across the seven, a mean of 353.29 each, with a spread of 169.72 between the strongest and weakest.
The required minimum
Each planet is compared against a threshold in Rupas. The values used here are the ones commonly cited for Parashari Shadbala:
| Planet | Required Rupas | Equivalent Virupas |
|---|---|---|
| Sun | 5.0 | 300 |
| Moon | 6.0 | 360 |
| Mars | 5.0 | 300 |
| Mercury | 7.0 | 420 |
| Jupiter | 6.5 | 390 |
| Venus | 5.5 | 330 |
| Saturn | 5.0 | 300 |
They were not transcribed from an original text for this page, so they carry the same unverified marking as every other rule set on this site and every one is editable. If the source you work from differs, change them and the comparison follows.
Why Mercury fails while Venus passes
This is the part the ranking alone hides, and it is the reason the page reports a ratio rather than only a total.
| Rank | Planet | Virupas | Rupas | Required | Ratio | Meets minimum |
|---|---|---|---|---|---|---|
| 1 | Jupiter | 422.29 | 7.04 | 6.50 | 1.08 | yes |
| 2 | Moon | 401.43 | 6.69 | 6.00 | 1.12 | yes |
| 3 | Sun | 375.00 | 6.25 | 5.00 | 1.25 | yes |
| 4 | Mercury | 372.71 | 6.21 | 7.00 | 0.89 | no, short by 0.79 |
| 5 | Venus | 363.86 | 6.06 | 5.50 | 1.10 | yes |
| 6 | Mars | 285.14 | 4.75 | 5.00 | 0.95 | no, short by 0.25 |
| 7 | Saturn | 252.57 | 4.21 | 5.00 | 0.84 | no, short by 0.79 |
Look at rows four and five. Mercury ranks above Venus on raw total — 372.71 Virupas against 363.86 — and yet Mercury fails its minimum while Venus passes hers.
The reason is that the thresholds differ. Mercury is expected to reach 7 Rupas and arrives at 6.21. Venus is expected to reach 5.5 and arrives at 6.06. Equal totals do not mean equal standing, and a ranking by Virupas alone will mislead you about which planets are actually meeting their requirement.
The ratio makes it directly comparable: 0.89 against 1.10. The Sun, third on raw total, has the highest ratio of all seven at 1.25, because its threshold is among the lowest. On this chart four of the seven meet their minimum.
What is carrying each planet
Two planets on the same total can be strong for entirely different reasons, and the total alone hides that. The contribution table shows each planet's largest and smallest component as a share of its own total:
| Planet | Largest | Share | Smallest | Share |
|---|---|---|---|---|
| Sun | Sthana Bala | 32.0% | Drik Bala | 2.7% |
| Mercury | Sthana Bala | 40.2% | Drik Bala | 3.2% |
| Jupiter | Sthana Bala | 39.1% | Drik Bala | 4.7% |
| Saturn | Sthana Bala | 41.6% | Drik Bala | 2.4% |
On this chart Sthana Bala dominates every planet, which is normal — positional strength is usually the largest single component. What varies is how much it dominates. Saturn draws 41.6% of its total from position while the Sun draws only 32.0%, because the Sun also carries the full 60 Virupas of Naisargika Bala and Saturn carries just 8.57.
That is worth noticing. Saturn's low total is partly structural: it starts nearly 52 Virupas behind the Sun before any chart-specific factor is considered. A weak Saturn on Shadbala is a less unusual finding than a weak Sun.
Reading the component table
Two checks worth running whenever you enter a chart.
The Naisargika column must total 240. If it does not, a value has been mistyped or your source rounds differently. It is the one column with a fixed answer, so it doubles as a proof that the table was entered correctly.
Compare column totals, not just rows. The example chart totals 910 Virupas of Sthana Bala against 85 of Drik Bala. That ratio tells you which components are doing the work across the whole chart, and a chart where Drik Bala is unusually large is a genuinely different picture from one where it is negligible.
Common mistakes
Entering Rupas where Virupas are expected
The bala grid wants Virupas. Enter 6.25 instead of 375 and every total will be sixty times too small. If your totals look absurdly low, this is almost always why.
Ranking by total and stopping there
Mercury above Venus on Virupas, below on ratio. Read the ratio column.
Reading high Shadbala as a good omen
It measures capacity, not benevolence. A strong malefic is strong.
Mixing sources
Balas from one piece of software and minimums from a different tradition will not compare meaningfully. Keep them consistent, and record which you used in the chart-details fields.
Expecting the birth details to compute something
They are recorded on the result and nothing more. The page says so beneath the summary every time.
Limitations
Five of the six balas are not computed here. The page is a totalling, conversion, comparison and ranking tool. Its output is only as good as the figures you enter.
The required minimums depend on your source. The defaults are B.V. Raman’s. The common translations of Brihat Parashara Hora Shastra (27.32–33) give the Sun 6.5 Rupas instead of 5 and agree on the other six. Every value is editable.
Rahu and Ketu are excluded. Classical Shadbala covers the seven grahas. Adding the nodes would be a choice with no basis in the system implemented here.
No interpretation is offered. The page reports arithmetic. What a given distribution of strength means for a chart is a matter for someone qualified to read one.
Nothing is stored. Everything runs in your browser and is gone when the tab closes.
Frequently asked questions
Why does this calculator ask me for the bala values instead of computing them?
Because five of the six need an ephemeris. Sthana Bala needs exact longitudes and divisional positions, Kala Bala needs sunrise and sunset for the birth moment, Cheshta Bala needs each planet's speed and whether it is retrograde, Drik Bala needs the aspect angles between every pair. Computing planetary positions to that precision is a substantial astronomical problem, and producing approximate ones while presenting the results as real figures would be worse than not offering them at all. So the page asks for what it cannot know and calculates everything that follows.
What does the calculator actually compute, then?
Naisargika Bala, which is a fixed ratio rather than a calculation and is supplied with its derivation. The Shadbala Pinda total for each planet. The conversion from Virupas to Rupas. The comparison against each planet's required minimum, as a difference and a ratio. The ranking of all seven. And the contribution analysis showing which of the six components is carrying each planet.
What is a Virupa and what is a Rupa?
A Rupa is sixty Virupas. Virupa and Shashtiamsa are two names for the same unit, which is why the specification mentions both. The relationship is definitional rather than conventional, so it is not a setting anywhere on this page. Enter your bala figures in Virupas and the totals appear in both units.
How is Naisargika Bala worked out?
The classical rule ranks the planets by apparent brightness and awards sixty-sevenths of a Rupa per rank: Saturn one unit, Mars two, Mercury three, Jupiter four, Venus five, Moon six and the Sun seven. So the Sun receives seven times 60 over 7, which is exactly 60 Virupas. The page shows that derivation rather than a table of rounded numbers, so nothing has to be taken on trust.
What is the required minimum strength?
A traditional threshold for each planet, in Rupas, against which its total is compared. The defaults follow B.V. Raman: Sun 5, Moon 6, Mars 5, Mercury 7, Jupiter 6.5, Venus 5.5 and Saturn 5. The common translations of Brihat Parashara Hora Shastra (27.32–33) agree on every planet except the Sun, which they give 390 Virupas — 6.5 Rupas. Every value is editable, so set the Sun to 6.5 if you work from that text.
What does the strength ratio mean?
The total divided by the required minimum. Above 1.00 means the planet meets its threshold; below means it does not. The ratio is more useful than the raw difference for comparing planets, because the thresholds themselves differ — Mercury is expected to reach 7 Rupas while the Sun only needs 5, so equal totals do not mean equal standing.
Can I use this with any ayanamsha or house system?
Yes, because the page does not compute positions at all. Whatever ayanamsha, house system and software produced your bala figures, this calculator simply totals and compares them. Record the settings you used in the notes field so a saved result says where the numbers came from.
Why are Rahu and Ketu not included?
Classical Shadbala is computed for the seven grahas only. Including the nodes would be a choice with no basis in the system this page implements, so they are left out rather than added with invented values.
Does a high Shadbala mean a planet gives good results?
Not in the sense the question usually intends. In the tradition, Shadbala measures a planet's capacity to give its results — strength, not benevolence. A strong malefic is conventionally read as more capable of producing its own kind of outcome, not as more favourable. This page reports the arithmetic and leaves interpretation to whoever is qualified to do it.
Is any of this scientifically established?
No. Shadbala is a traditional interpretive framework within Vedic astrology. It has no established predictive validity, and this page makes no claim that it does. What the calculator offers is correct arithmetic on figures you supply, within a system whose own rules it follows carefully.
Disclaimer
Shadbala is a traditional interpretive framework within Vedic astrology. It is not a scientific measurement, and nothing on this page suggests otherwise. Astrology has no established predictive validity. This calculator performs correct arithmetic within a system's own rules; that is a statement about the arithmetic, not an endorsement of the system.
Five of the six balas are supplied by you. This page computes no planetary positions and cannot check the figures you enter. If they are wrong, every total, ranking and comparison here will be wrong with them, and the page has no way to detect it.
The required minimums are not authoritative. They are the values commonly quoted, not transcribed from an original text for this page. Sources differ. Check them against whichever you work from and edit them where they differ.
No prediction, reading or advice is offered here. The page reports totals, ratios and rankings. It says nothing about what will happen to anyone, and it should not be used as a basis for decisions about health, money, relationships, career, travel, marriage or anything else that matters.
For medical, financial, legal or psychological concerns, please consult a qualified professional in that field. Please be particularly careful of anyone who uses a calculation like this one to create urgency, to sell remedies, or to discourage you from seeking ordinary professional help.