This tool tells you which Vimshottari Mahadasha, Antardasha and Pratyantardasha you are running today, and when each of them changes. The whole 120-year cycle is anchored to the Moon's nakshatra at your birth, so the answer follows from your date, time and place with no interpretation in between.
Vimshottari runs Ketu 7 years, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19 and Mercury 17, in that order, totalling 120. The order never changes; what differs from person to person is where in the ring the life begins and how much of that first period had already run.
Both come from the Moon. The lord of the nakshatra the Moon occupied at birth opens the sequence, and the proportion of that nakshatra the Moon had already crossed is the proportion of the first mahadasha already elapsed. A Moon halfway through a Rohini, ruled by the Moon, means five of the Moon's ten years were gone at birth.
Each mahadasha is divided into nine antardashas in the same lord order beginning with its own lord, each proportional to its lord's share of 120 years, and each antardasha is divided again the same way into pratyantardashas. AstroZivi computes five levels in all, down to sookshma and prana, though the first three are what a reading normally uses.
There is one detail that a great many calculators get wrong, and it changes real dates. The sub-periods of the first mahadasha must be cut from the full length of that dasha, starting from its notional pre-birth start, not from the balance that remained at birth. Cutting from the balance displaces every antardasha boundary inside the first mahadasha, which for someone born early in a long dasha can be years out.
The dates are as accurate as your birth time. The Moon moves about thirteen degrees a day, so it crosses a nakshatra in a little under a day and a pada in about six hours; an error of an hour in the birth time shifts the balance of the first mahadasha by weeks, and every later boundary inherits that shift.
What the tool prints is the running mahadasha, antardasha and pratyantardasha, with the exact start and end date of each and the time remaining in the current one. It does not attach a prediction to a lord pairing on this page: the interpretive layer belongs with the full chart, where a reading can be traced to a text.
A Mahadasha is a major planetary period in the 120-year Vimshottari cycle. The nine lords run Ketu 7 years, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19 and Mercury 17, always in that order, and each contains nested Antardasha and Pratyantardasha sub-periods.
As accurate as your birth time. The sequence is computed from the Moon's nakshatra at birth and the exact fraction of it already crossed, so a precise date, time and place give exact period start and end dates, while an hour of error can move the first boundary by weeks.
The one ruled by the lord of the nakshatra the Moon occupied at your birth, and it starts partly elapsed. The proportion of the nakshatra already crossed is the proportion of that mahadasha already gone before you were born.
Usually because of how the first mahadasha is handled. Its sub-periods must be cut from the full length of the dasha, starting from its notional pre-birth start, not from the balance remaining at birth. Cutting from the balance displaces every antardasha boundary inside that first period.
Five: mahadasha, antardasha, pratyantardasha, sookshma and prana. The page highlights the first three, which are what most readings use, and each level is divided in the same lord order and in proportion to each lord's share of the 120 years.
For educational purposes. Astrological interpretations are traditional and not a substitute for professional advice.