Mahadasha Calculator

This calculator lays out the Vimshottari dasha sequence, the 120 year cycle Vedic astrology divides between nine planetary lords. Give it the Moon sidereal longitude from a chart you already trust, or a birth date, time and UTC offset, and it returns the nakshatra and its lord, how much of that first period was still to run at birth, the dates of all nine mahadashas and the antardashas inside the first one. Working from a birth moment, the Moon is computed here rather than read from an ephemeris, so it is good to about a tenth of a degree and the resulting uncertainty in the dates is printed alongside them. Vimshottari dasha is a tradition and this page does its arithmetic, nothing more.

Calculator Type
Local clock time at the place of birth. The dasha dates are given in that same local reckoning.
From a chart you already trust. Add 30 degrees for each sign before the Moon: Mesha 0, Vrishabha 30, Mithuna 60, Karka 90, and so on, then add the degrees within the sign.
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Local clock time at the place of birth.
India is 5.5, London is 0 in winter and 1 in summer, New York is -5 in winter and -4 in summer.
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