Jupiter (Guru) Mahadasha: sixteen years, nine sub-periods, and the conditions the texts attach

Jupiter's Mahadasha runs for sixteen years out of the 120-year Vimshottari cycle. It follows Rahu's eighteen years and hands over to Saturn's nineteen. Because BPHS calls Guru "the great benefic", the period is widely sold as sixteen good years for everyone. The texts do not say that. They state a result and then say when it applies: where Jupiter sits, how strong it is, which houses it rules from your Lagna, and where each sub-period lord stands in relation to it. This page lays those conditions out with chapter and sloka, and shows how to check each one with the Vimshottari Dasha calculator and the birth chart calculator. For Jupiter as a graha in general, read Jupiter in Vedic astrology first.

Sixteen years of 120: the arithmetic

BPHS Ch. 46 Sl. 12-14 gives the Vimshottari order starting from Krittika: Surya, Candr, Mangal, Rahu, Guru, Shani, Budh, Ketu, Shukr. Guru is fifth in that list. The engine stores the same cycle rotated so that it begins with Ketu, the lord of the first nakshatra: Ketu 7, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19, Mercury 17. Those nine numbers add to 120. Rotating the list changes nothing about the order; Jupiter always comes after Rahu and before Saturn. The general mechanics are covered in what a Mahadasha actually is.

Sixteen years is 13.33 percent of the cycle, which makes Jupiter's the fifth longest of the nine periods, behind Venus, Saturn, Rahu and Mercury. In the engine one dasha year is 365.2425 days, so a full Jupiter Mahadasha is 5,843.9 days. The only Jupiter Mahadasha that can be shorter is one you are born into. BPHS Ch. 46 Sl. 16 says the elapsed part is found from how far the Moon had already travelled through the birth nakshatra, and the engine does that, multiplying sixteen years by the unelapsed fraction of the nakshatra.

When the Jupiter Mahadasha arrives

The lord of the birth nakshatra starts the sequence. The engine takes the Moon's nakshatra index (0 to 26) modulo 9, and index 6 in the Ketu-first cycle is Jupiter. Three nakshatras fall on that index: Punarvasu, Vishakha and Purva Bhadrapada. A person whose Moon was in one of those three at birth is born inside a Jupiter Mahadasha and lives out only its remaining part, in childhood. Everyone else meets it later, at an age fixed by which lord they started with. The nakshatra calculator shows your starting lord.

What BPHS says: Chapter 47

Chapter 47 opens with a distinction that governs everything after it. Sl. 2 says dasha effects are of two kinds, general and distinctive: the general ones come from the natural character of the graha, the distinctive ones from its placement. Sl. 3-4 add that effects are "in accordance with their strength". Sl. 5-6 then give the test this app codes directly: results are favourable if, at the commencement of the dasha, the lord is in the Lagna, in its exaltation, in its own sign or in a friendly sign; unfavourable if it is in the 6th, 8th or 12th house, in debilitation, or in an inimical sign.

Sl. 44 introduces the Jupiter passage by calling Guru "the great benefic" and preceptor of the gods. Two blocks follow, and each begins with "if".

• Sl. 45-48, the strong case. If Guru is in exaltation, in its own sign, in its Moolatrikona, in the 10th, 5th or 9th house, in its own Navamsa or in its exalted Navamsa, the text lists acquisition of a kingdom, great felicity, recognition by government, conveyances and clothes, devotion, happiness in respect of spouse and children, and success in religious observances.
• Sl. 49-51, the weak case. If Guru is debilitated, combust, associated with malefics, or in the 6th or 8th house, the text lists loss of residential premises, anxiety, distress to children, loss of cattle, and pilgrimage.

The weak case ends with a qualification that sets Jupiter apart from most of the chapter. Sl. 49-51 say the dasha "will give some unfavourable effects at its commencement only", and that the later part brings good effects such as gain of wealth and recognition. So even where Parashara reads Jupiter as poorly placed, he does not write off the sixteen years. He describes a difficult start followed by improvement. "Kingdom" and "cattle" are the vocabulary of the period the text was written in. Read in present terms they point at position and movable wealth; the text itself says no more than what is listed.

Three conditions in the strong case need separate tools. Sign dignity and house are on the main chart. The Navamsa conditions need the D9, which the Navamsa calculator draws; Navamsa, the second chart explains why a planet can be strong in one and weak in the other. Combustion, in the weak case, is a matter of how close Jupiter is to the Sun.

What Jupiter rules in your chart: Chapter 48

Chapter 48 moves from the graha to its job in a particular chart. Sl. 1 states the principle: a naturally inauspicious graha that is exalted and well housed does not give bad results, and a benefic that is debilitated and badly housed "will produce adverse effects". That sentence is the direct classical answer to the idea that Jupiter's period must be good because Jupiter is a benefic. Sl. 2-8 then give a result for the dasha of each house lord. Jupiter rules Sagittarius and Pisces, so it rules two houses in every chart, and which two depends on the rising sign.

The table shows why two people with equally strong Jupiters describe the period differently. For a Pisces or Sagittarius Lagna, Jupiter is the Lagna lord and rules a second Kendra. For a Libra Lagna it rules the 3rd and 6th, and Sl. 18-20 say plainly that the dashas of the 3rd, 6th and 11th lords "will prove unfavourable". For Gemini and Virgo it rules two Kendras, one of them the 7th, which the same slokas treat as a Marak house.

BPHS Ch. 34 gives a separate verdict on each graha for each rising sign, and the engine stores it in YOGA_KARAKA_BY_LAGNA. Jupiter is listed as auspicious for Aries, Cancer, Leo and Scorpio; as inauspicious for Taurus, Gemini, Virgo, Libra, Capricorn and Aquarius; among the Yoga Karakas for Pisces; and in neither list for Sagittarius. For six of the twelve Lagnas, then, the primary text does not count Jupiter as a functional benefic at all. Your rising sign comes from the Lagna calculator, and it needs a birth time.

Chapter 48 also softens its own verdicts. Sl. 14-17 say the dasha of a 6th, 8th or 12th lord becomes favourable if it associates with a Trikon lord, and that a graha aspected by a Kendra or Trikon lord also gives a favourable dasha. And Sl. 8 adds a rule the engine does not apply: the graha's placement "at the time of birth and at the commencement of the Dasha should both be taken into account".

The nine antardashas of the Jupiter Mahadasha

BPHS Ch. 51 Sl. 1 gives the rule for a sub-period: multiply the dasha years of the two grahas and divide by the total years of all. Sl. 2 says the first Antar Dasha always belongs to the dasha lord, and the rest follow in the usual order. Inside Jupiter that order is Jupiter, Saturn, Mercury, Ketu, Venus, Sun, Moon, Mars, Rahu. The engine uses one function, subdivideVimshottari(), for this split and for the level below it. The mechanics are explained in Antardasha, Pratyantardasha, and why the dates slide.

BPHS Ch. 56 gives every one of these nine sub-periods a favourable reading and an unfavourable one, each tied to a condition. Four kinds of condition recur: the sub-lord's own dignity; its house from the Lagna; its position counted from Jupiter, the dasha lord; and whether it rules or sits in the 2nd or 7th. The summaries below keep the conditions and leave out the remedies and lifespan lines.

Jupiter-Jupiter (Sl. 1-7)

If Guru is exalted, in its own sign, in a Kendra or a Trikon, the text lists riches, reverence from the ruler, a new house, success in ventures, "extraordinary profits from the employer" and happiness to spouse and children. If Guru is debilitated, in its debilitated Navamsa, or in the 6th, 8th or 12th, it lists great distress, slander by coparceners, the employer's displeasure, separation from family and loss of wealth. Bodily pain is mentioned if Guru rules the 7th or 2nd.

Jupiter-Saturn (Sl. 8-19)

If Shani is exalted, in its own sign, or strong in a Kendra or Trikon: gain of position, wealth, grains and conveyances, happiness from children and friends, a journey to the west and wealth received from the ruler. If Shani is in the 6th, 8th or 12th, combust or in an enemy sign: loss of wealth, fever, mental strain, loss of employment and antagonism with relatives. Counted from Jupiter, Shani in a Kendra, a Trikon, the 11th or the 2nd gives land, house and property; Shani in the 6th, 8th or 12th from Jupiter, or with a malefic, gives loss, obstacles in ventures and friction within the family.

Jupiter-Mercury (Sl. 20-31)

If Budh is exalted, in its own sign, in a Kendra or Trikon, or together with Jupiter: gains of wealth, bodily ease and conveyances. If Budh is aspected by Mars: more enemies, loss in business and fever. Budh in a Kendra, the 5th or the 9th from Jupiter gives gains in one's own country and happiness from parents. Budh in the 6th, 8th or 12th from Jupiter, or with a malefic and without a benefic aspect, gives loss of wealth, foreign wandering and eye trouble. Sl. 29 adds a split result: Budh with a malefic but aspected by a benefic gives enjoyment at the start of the sub-period and loss at its end.

Jupiter-Ketu (Sl. 32-38)

This is the most muted of the nine. Even the favourable case, Ketu with or aspected by a benefic, gives only "moderate enjoyment, moderate gain of wealth", coarse food and money through undesirable means. Ketu in the 6th, 8th or 12th from Jupiter, or with malefics, gives loss through the ruler's displeasure, loss of strength and friction with father and brother. Ketu in the 5th, 9th, 4th or 10th from Jupiter gives success in the desired sphere and profit in business.

Jupiter-Venus (Sl. 39-50)

If Shukr is in a Kendra, Trikon or the 11th, or in its own sign with a benefic aspect: conveyances, wealth through the ruler, well-being in the family, happiness from parents, and charitable works such as building reservoirs. If Shukr is debilitated, or in the 6th, 8th or 12th from Jupiter or from the Lagna: quarrels, antagonism with relatives, distress to spouse and children. Shukr with Saturn, Rahu or both gives disputes with the spouse and in-laws and loss of wealth. Shukr in a Kendra, Trikon or the 2nd from Jupiter gives wealth, happiness from the spouse, music and the company of the learned.

Jupiter-Sun (Sl. 51-57)

If Surya is strong and exalted, in its own sign, in a Kendra or Trikon, or in the 3rd, 11th or 2nd: wealth, reverence, birth of children, cordial relations with the ruler and success in ventures. If Surya is in the 6th, 8th or 12th from the Lagna or from Jupiter: fever, "laziness, or reluctance in the performance of good deeds", an antagonistic attitude and separation from relatives.

Jupiter-Moon (Sl. 58-64)

If Candr is full and strong, exalted or in its own sign, in a Kendra, Trikon or the 11th, and well placed from Jupiter: reverence from the ruler, happiness from spouse and children, good food, reputation through good deeds, and religious and charitable inclinations. If Candr is weak, with malefics, or in the 6th, 8th or 12th from the Lagna or from Jupiter: loss of wealth and relatives, wandering abroad, quarrels with coparceners and distress to the mother.

Jupiter-Mars (Sl. 65-71)

If Mangal is exalted, in its own sign, or in its exalted or own Navamsa: celebrations "such as marriage", gain of land or villages, growth of strength and success in all ventures. If Mangal is in a Kendra, Trikon, the 11th or 2nd with benefic association or aspect: wealth, grains and happiness from the family. If Mangal is in the 8th or 12th from Jupiter, or debilitated with malefic association or aspect: loss of wealth and house and eye trouble. The text adds that the adverse effects are sharpest at the start of the sub-period and ease later.

Jupiter-Rahu (Sl. 72-80)

If Rahu is in its exaltation, own sign or Moolatrikona, in a Kendra or Trikon, aspected by a Kendra lord, or with or aspected by a benefic: "attachment to Yog", gain of wealth and grains "during the first five months", authority over a village or country, journeys to distant lands and bathing in holy places. If Rahu is with a malefic or in the 8th or 12th from Jupiter: danger from thieves and snakes, domestic trouble, bad dreams and quarrels without reason. This is the closing sub-period, and it runs for nearly two and a half years before Saturn's Mahadasha begins.

One level further: pratyantardashas

BPHS Ch. 61 Sl. 1 repeats the proportional rule at the third level. Inside the 779.2-day Jupiter-Jupiter antardasha the nine pratyantars run about 103.9 days (Jupiter), 123.4 (Saturn), 110.4 (Mercury), 45.5 (Ketu), 129.9 (Venus), 39.0 (Sun), 64.9 (Moon), 45.5 (Mars) and 116.9 (Rahu). Sl. 38-46 give each a one-line result: Guru-Guru, gain of gold and wealth; Shani, increase in lands, conveyances and grains; Budh, success in education and visits of friends; Ketu, danger from water and thieves; Shukr, several kinds of learning, well-being and satisfaction; Surya, gain from the ruler, friends and parents; Candr, no distress and success in ventures; Mangal, trouble from enemies and digestive complaints; Rahu, loss of wealth through quarrels with subordinates.

These lines carry their own warning. Sl. 2 of the same chapter says such results "are general effects" and do not appear where the graha is in a Trikon, rules an auspicious house, or is well placed in the vargas, and that every other pratyantar is to be judged the same way. At this level the windows are weeks long and depend heavily on an accurate birth time, so they are better treated as a calendar of sub-windows than as forecasts.

Saravali: favourable and adverse Jupiter, under a different scheme

Kalyana Varma's Saravali describes dasha results in Ch. 41, but under its own Moola Dasa scheme, in which the order and length of periods are derived from planetary strength and not from the Moon's nakshatra. Its dates therefore do not match Vimshottari dates. Its descriptions of what a planet's period is like are still a second classical opinion, and Sl. 1 states the same principle as Parashara: planets give pleasant or unpleasant results in their dasas "according to their (natal) dispositions".

• Sl. 41-43, favourable Jupiter: gain through ministers or advisers, rulers and statesmanship; honours, virtues, courage, wide friendship, a life partner, gold, conveyances, auspicious acts and wealth through the public, businessmen and elders.
• Sl. 44, adverse Jupiter: excessive grief, physical complaints (the text names the stomach and ears) and fear from rulers. This is the text's association, not a diagnosis.

Saravali Ch. 42 then gives one flat sentence for each sub-period (bhukti) in Jupiter's dasa, with no conditions attached. Set beside BPHS Ch. 56 they show where the two sources agree and where they do not.

The two disagreements are worth noticing. Saravali treats Venus and Saturn sub-periods in Jupiter's dasa as unpleasant without qualification, and the engine's friendship table does list Venus among Jupiter's natural enemies. BPHS makes both conditional on the sub-lord's own state. Saravali's general rules partly close the gap: Ch. 42 Sl. 6-7 say that when the major lord is in an Angle or a Trine from the Ascendant "there will be great happiness", and Sl. 9-10 single out the sub-period of a planet in the 8th from the dasa lord as the difficult one. Both texts end up at the same place: measure from the dasha lord.

A modern casebook view

Advanced Predictive Astrology, a 2000 collection of worked charts, adds rules of thumb from practice. They are one author's observations and not classical slokas, and they are reported here as such.

• Gaja Kesari and the two dashas. Rule 31 in its chapter on good and bad time says that when Jupiter and the Moon are together or in mutual angles, the Moon's dasha gives excellent results while Jupiter's gives ordinary ones. Elsewhere the same book says a Gaja Kesari chart gets "immense prosperity" from the Jupiter Mahadasha, provided the Moon's dasha does not fall between ages 21 and 65. Read together, the author's view is that the yoga pays out mainly through whichever of the two dashas falls in working life.
• Jupiter with Saturn. Rule 32 says that when Jupiter and Saturn share a sign or aspect each other, the Jupiter dasha "becomes very dull". The same book also records Aurangzeb being crowned in a Jupiter-Saturn period and credits a yoga formed by those two planets. The rule is therefore not absolute even within its own source.

Whether your chart has the Jupiter-Moon relationship at all is something this app computes. Its detector counts the house distance from the Moon to Jupiter and reports Gaja Kesari with the two house numbers; it also detects Hamsa, the Panchamahapurusha yoga formed by Jupiter. Both appear on the yogas calculator, and what a yoga in your chart means explains how to read them.

How this app reads a Jupiter Mahadasha

The function that produces the dasha reading on the Kundali and Timing pages is buildDashaLordEffects() in kundaliEngine.js. It codes BPHS Ch. 47 Sl. 5-6 and nothing more elaborate. For Jupiter it looks up the sign, computes the dignity, reads the house, and returns a verdict.

• Dignity: the engine's table has Jupiter exalted in Cancer, in Moolatrikona in the first ten degrees of Sagittarius, in its own sign in the rest of Sagittarius and in Pisces, and debilitated in Capricorn. Any other sign is classed as friendly, neutral or enemy from the fivefold relation between Jupiter and that sign's lord, which combines natural friendship (Sun, Moon and Mars are Jupiter's friends; Mercury and Venus its enemies) with their positions in your chart.
• Favourable: Jupiter is exalted, in Moolatrikona, in its own sign or in a friendly sign, or is in the 1st house; and it is not debilitated or in an enemy sign; and it is not in the 6th, 8th or 12th.
• Testing: everything else. A neutral-sign Jupiter outside the Lagna is therefore "testing" in the two-way verdict.
• Three-tier quality (dashaQuality): "challenging" if debilitated, in an enemy sign or in a dusthana; "good" if exalted, Moolatrikona or own sign; "neutral" otherwise. This keeps the middle from being forced to either side.
• House lordships: the two houses Jupiter rules from your Lagna, each with its Ch. 48 theme from the table above.

The sentence you see is built from a template. A favourable result says Jupiter is in its dignity in its sign and house, "classically read as a favourable placement for this Mahadasha", tending toward expansion, recognition, prosperity and progress in family, learning or spiritual life. A testing result says "classically read as a more testing placement", tending toward "a slower, more testing period early on, though effects usually improve as the period matures". That second wording is Ch. 47 Sl. 49-51 carried into the product: the engine does not describe a poorly placed Jupiter as sixteen bad years, because the source does not. The words "classically read as" are kept in every language to mark the claim as the tradition's, not as a prediction by this app.

Checking a Jupiter Mahadasha in your own chart

1. 1.Get the dates. Run the Vimshottari Dasha calculator. It returns the full timeline, the Mahadasha running today and its nine antardashas. It needs the date of birth; the birth time sharpens the Moon's position and therefore every boundary.
2. 2.Find Jupiter's sign and house on the birth chart. Apply Ch. 47 Sl. 45-48 and 49-51: exaltation, own sign, Moolatrikona, or the 5th, 9th or 10th house on one side; debilitation, combustion, malefic company, or the 6th or 8th house on the other.
3. 3.Check the Navamsa. Sl. 45-48 count Jupiter in its own or exalted Navamsa as strong, and Ch. 56 Sl. 4-5 count a debilitated Navamsa as weak.
4. 4.Find which two houses Jupiter rules from your Lagna, using the table above, and read the Ch. 48 theme for each. Then check whether Jupiter is joined or aspected by a Kendra or Trikon lord (Sl. 14-17).
5. 5.Count houses from Jupiter to each of the other eight grahas. Mark those in a Kendra, Trikon, the 2nd or the 11th from Jupiter, and those in the 6th, 8th or 12th from it. This one pass sorts the nine sub-periods the way Ch. 56 does.
6. 6.Check strength. BPHS Ch. 47 Sl. 3-4 tie results to strength, and the Shad Bala calculator shows Jupiter's computed strength against the other grahas.
7. 7.Look at the sky now. The gochar calculator shows where the grahas, Jupiter included, are transiting counted from your natal Moon. Dasha and transit are separate layers; the dasha says whose period it is, and the transit says where that graha is at present.

Jupiter's house is the single most informative fact in step 2, and each placement has its own page: 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th and 12th. If you would sooner ask about your own dates in plain language, the AI chat answers from the same computed chart and dasha data.

Common misreadings

• "Jupiter's dasha is always good." BPHS Ch. 48 Sl. 1 says the opposite in so many words: a benefic that is debilitated and in an inauspicious house gives adverse effects. Ch. 34 lists Jupiter as inauspicious for six rising signs.
• "A debilitated Jupiter means sixteen bad years." Ch. 47 Sl. 49-51 limit the unfavourable effects to the commencement and describe gains and recognition later.
• "Jupiter Mahadasha brings marriage and children." Marriage appears once in Ch. 56, in the Mars sub-period when Mars is strong (Sl. 65-66). Children appear in several favourable cases. None of these lines is unconditional, and none of them names a year.
• "Gaja Kesari guarantees a great Jupiter dasha." The one source in this corpus that addresses the question says the yoga favours the Moon's dasha more, and that Jupiter's results depend on when each dasha falls.
• "My dates are exact to the day." Every boundary is computed from the Moon's longitude at birth. A birth time that is off shifts the first balance, and that shift carries through all later Mahadasha, antardasha and pratyantar dates.

Before and after: the neighbours

Jupiter's period is always entered from Rahu's Mahadasha and always exits into Saturn's. The Rahu-Jupiter sub-period that ends Rahu's eighteen years and the Jupiter-Rahu sub-period that ends Jupiter's sixteen are both read from the relationship of those two grahas in your chart, so it is worth checking that relationship once and using it twice.

The other periods are covered on their own pages: Sun, Moon, Mars, Mercury, Venus and Ketu. Vimshottari is also not the only system in BPHS; the alternate dashas calculator shows the conditional systems from Ch. 46 that apply to your chart.

Questions people ask

How long is the Jupiter Mahadasha?

Sixteen years of the 120-year Vimshottari cycle. The engine counts a year as 365.2425 days, so a full period is 5,843.9 days. It is shorter only if you were born during it, in which case you live out the part remaining at birth.

At what age does it start?

It depends on the lord of your birth nakshatra. At the latest: birth for a Jupiter nakshatra, 18 for Rahu, 25 for Mars, 35 for Moon, 41 for Sun, 61 for Venus, 68 for Ketu, 85 for Mercury and 104 for Saturn. Your actual age is earlier by the part of the first period already elapsed at birth. The dasha calculator gives the exact dates.

Is Jupiter Mahadasha good for everyone?

No source used here says so. BPHS Ch. 47 gives a strong case and a weak case; Ch. 48 Sl. 1 says a debilitated, badly housed benefic gives adverse effects; Ch. 34 lists Jupiter as inauspicious for Taurus, Gemini, Virgo, Libra, Capricorn and Aquarius Lagnas. The result is read from your chart, not from the name of the planet.

My Jupiter is debilitated in Capricorn. What do the texts say?

BPHS Ch. 47 Sl. 49-51 list anxiety, loss of premises and distress concerning children, then add that the unfavourable effects come "at its commencement only", with gain of wealth and recognition in the later part. This app labels such a Jupiter "testing" or "challenging" and uses the same early-difficulty, later-improvement wording.

Which antardasha in Jupiter Mahadasha is the best?

The texts do not rank them. BPHS Ch. 56 gives each sub-period a favourable and an unfavourable reading and decides between them by the sub-lord's dignity, its house, and above all its position counted from Jupiter. The sub-periods of grahas in a Kendra, Trikon, 2nd or 11th from your Jupiter are the ones the chapter reads as helpful.

What comes after Jupiter Mahadasha?

Saturn's nineteen years, always. The last sub-period before the change is Jupiter-Rahu, about two years and five months long. See the Saturn Mahadasha page for what follows.

Does the app suggest remedies for a difficult Jupiter period?

No. BPHS Ch. 56 prescribes recitations and gifts for several sub-periods. This app does not carry over remedies, gemstones, mantras or donations from any source.

Do I need my birth time?

The dasha calculator runs on a date alone, but the Moon moves about one nakshatra a day, so an unknown time can move every boundary by months and occasionally changes the starting lord. The house and Lagna conditions in Ch. 47, 48 and 56 cannot be checked at all without a birth time.