Ketu 7, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19 and Mercury 17, in the order of their operation. Vimshottari Dasha assumes that the maximum duration of life of an individual human being is 120 Solar sidereal years which is the aggregate duration of all nine planetary periods i.e. Vimshottari in Sanskrit stands for the number 120. undesirable or miserable results the planet that has fallen from exaltation but is in friendly or exalted navamsa gives ordinary results, and the planet that is ascending from debilitation but is in debilitated or unfriendly navamsa, gives a worthless period. Varahamihira explains that the dasha of the planet occupying unfriendly sign and navamsa will produce Aristaphala i.e. It is called the 'Poorna Dasha' if the planet is the most powerful or is in its sign of exaltation, which dasha gives health and wealth the dasha of a powerless planet is called the 'Rikta dasha', 'Rikta' means poor or devoid of any power. There are at least 43 different dasha systems. There are nine planets or grahas which severally rule the nine dashas: the seven classical planets, plus the north node, Rahu, and south node, Ketu, of the Moon.

Each dasha is controlled by one of the nine planets, and the quality and relative benevolence of each period is determined by the condition and position of that planet in the natal chart. : 4 Dashas provide a system to judge the effects of the planets throughout a person's life, by indicating how the planets distribute their effects. There are many kinds of Dasha systems, Parashara mentions forty-two of them, but of these only two are in vogue, namely, 'Vimshottari' and 'Ashtottari'. The Dasha Paddhati (system) of Directional Astrology is unique to the Hindus it is found nowhere else.

The planetary periods indicate when the good or bad effects are produced according to their placement by sign (Rasi), house (Bhava), combinations ( Yogas or Raja Yogas) or aspects ( Drishti). The Sanskrit term 'dasha' in Hindu astrology is used to indicate planetary periods. Dasha ( Devanagari: दशा, Sanskrit, daśā, 'condition', 'state', 'circumstances', 'period of life', 'planetary period'.) The dasha pattern shows which planets according to Hindu astrology would be ruling at particular times.

Dasha astrology calculator