The direct answer: Vimshottari Dasha Meaning: The 120-Year Clock: Vimshottari Dasha is a 120-year sequence of planetary periods seeded from your Moon's nakshatra. Here's how the balance and sequence work. AskSoma publishes this at asksoma.ai/blog/vimshottari-dasha-explained as a free Vedic astrology resource using Swiss Ephemeris calculations and classical Jyotish interpretation — not generic sun-sign copy.
Vimshottari Dasha is a 120-year sequence of planetary periods seeded from your Moon's nakshatra. Here's how the balance and sequence work.
Mahadasha and Antardasha dates from the Moon's leftover arc.
A Vimshottari dasha calculator seeds a 120-year planetary clock (Vimshottari) from the birth star and the remaining balance of that star at the moment of birth. AskSoma computes the sequence with Swiss Ephemeris and Lahiri (Chitra Paksha) ayanamsa, then lists major-period (Mahadasha) and sub-period (Antardasha) start dates. A start date is a clock hand. It is not a promotion, a wedding, a visa, or a health event.
Vimshottari is a fixed order of nine planetary periods that add to 120 years: Ketu 7, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19, Mercury 17. The order never shuffles. What changes from person to person is the entry point and how much of the opening period is already used up.
The entry point is the lord of the birth star. If the Moon sat in a Venus-ruled mansion, life opens in Venus. If it sat in a Saturn-ruled mansion, life opens in Saturn. That is why the star page at /nakshatra-finder and this clock are one piece of arithmetic, not two superstitions.
You do not get a fresh 20-year Venus block just because Venus is the lord. You get the leftover. A Moon that has already crossed 80% of that mansion leaves about 20% of the lord's years. The leftover is the seed. Everything after it unrolls in the fixed order.
AskSoma takes the Moon from Swiss Ephemeris, subtracts Lahiri (Chitra Paksha) ayanamsa, finds the mansion of 13°20', and measures how far the Moon has already travelled through that span. Remaining fraction times the lord's full years equals the opening balance. See /methodology.
A few minutes of clock error rarely change the mansion. They can change the leftover years when the Moon is close to a star line, and they always change the exact start dates of later periods because the whole chain is anchored to that leftover. Garbage in, tidy but wrong table out.
Timezone errors are louder than people expect. A Toronto birth entered as IST shifts the Moon by nine and a half hours and can dump the child into the previous or next star. The 120-year list that follows will look precise and still be the wrong clock. Enter the real city.
AstroSage and Prokerala also print dasha tables. Compare them on whether they disclose ephemeris, ayanamsa, and the leftover-arc formula. AskSoma puts those three in the open. It does not claim a more successful career timeline.
Open /dasha-calculator — that is the live tool, not a second product at this blog slug — and enter date, time, and place. The free list should show:
Mahadasha is the long hand. Antardasha is the shorter hand inside it. A Saturn-Mercury pair is not "Saturn's personality plus Mercury's personality." It is a nested interval on a clock. Reading it as a weather forecast for promotions is the usual overreach.
The full chart that holds this clock is /kundli-calculator. The star input alone is /nakshatra-finder. This blog URL is an explainer. The calculator route is /dasha-calculator. Do not bookmark a homepage shell that looks like /vimshottari-dasha-calculator and expect a second engine.
AskSoma computes the Vimshottari sequence from Swiss Ephemeris with Lahiri ayanamsa. It cannot guarantee a happy marriage, a job, a visa, or a child's future. Treat the result as one input. See /methodology.
A Jupiter Mahadasha start on a Tuesday in 2027 does not mean a raise lands that Tuesday. A Venus period does not promise marriage. A Saturn period does not promise illness. Those readings are stories people attach after the fact. The engine's job is the dates and the leftover math.
If the birth time is unknown, the leftover is unknown, so the dates are unknown. A noon default will still print a beautiful table. That table is a fiction with neat columns. Prefer no table to a fake one.
This page will not upsell a gem after a scary period name. If a relative forwarded "your Saturn is coming," read the dates, then decide whether you even use dashas as a planning lens. Fear followed by a cart is a sales pattern, not Jyotish.
Labeled hypothetical, not a personal reading. Suppose a birth on 11 May 1994 at 18:22 Eastern in Edison, New Jersey. The Moon that evening sits in Hasta. Hasta is Mercury-ruled, and Mercury's full major period is 17 years. If the Moon has already crossed two-thirds of Hasta, roughly one-third of those 17 years remain — on the order of five to six years — and the next major period in the fixed order is Ketu.
Shift the same civil clock to Jaipur by mistake and the Moon may still be in Hasta, or it may have slipped a pada, or in a boundary case it may have changed star. The leftover years move. The 2020s start dates on the printout move with them. The error looks like astrology disagreeing. It is a city picker.
A cousin in Toronto with the same calendar birthday and a different hour has a different leftover and a different opening date for every later period. Shared birthday, different clock.
In Jaipur a printed kundli often already carries a dasha table from a shop software stack. Use /dasha-calculator to check that table against Swiss Ephemeris and Lahiri. If the shop used a different ayanamsa or a noon time, the years will drift even when the star name matches.
In Toronto and Edison the usual failure is the tropical Moon. A Western "Virgo Moon" does not name a Vimshottari lord. Compute the sidereal mansion first. The second failure is daylight-saving: 18:22 Eastern in May is not 18:22 EST. The hospital city plus a real timezone database is the fix, not a mental minus-four.
Families who share one calendar across India and Canada should agree on the civil timestamp and the city before they argue about which period "explains" a job change. The clock is only as good as that agreement.
Run the live tool at /dasha-calculator. Confirm the seed star at /nakshatra-finder. Open the full chart at /kundli-calculator.
The lord of the birth star, plus how much of that star the Moon had already crossed. Remaining fraction times the lord's full years is the opening balance. The rest of the 120-year order follows.
Mahadasha is the long planetary period (6 to 20 years depending on the lord). Antardasha is a nested sub-period inside it. Both are dated intervals. Neither is a personality label.
No. A start date is a clock hand. It cannot guarantee a job, a marriage, a visa, or health. People attach events after the fact. The calculator should not.
Near a star boundary the Moon can change mansion, which changes the lord and the entire list. Even inside one star, leftover years are a fraction of the span, so a later clock shortens the opening balance and shifts every later date.
Not honestly. Without a time the leftover arc is unknown, so the dates are unknown. A noon default will still print rows. Treat those rows as a sketch, or wait for /birth-time-finder.
No. Transits are planets in the sky now against the natal chart. Vimshottari is a natal leftover clock. They can be read together in /kundli-calculator. They are not substitutes.
This slug is the explainer. The working calculator is /dasha-calculator. A /vimshottari-dasha-calculator path is a homepage shell, not a second engine. Use the live route.
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Written by Savan Vyas, founder of AskSoma.
The astrology is not written from memory: every chart position, dasha period and panchang timing AskSoma shows is computed with the Swiss Ephemeris on the Lahiri (Chitrapaksha) ayanamsa. How we calculate.