What the Dasha system does

Every predictive method in astrology tries to answer one question: when will the promises in a chart show up? Western astrology uses secondary progressions, solar returns and transits. The Vedic Vimshottari Dasha system answers it differently. It gives a fixed sequence of planetary periods that starts from your birth and runs for 120 years, so you can see which planet's themes are active at any age.

The word Vimshottari points to the number 120. The cycle has nine planetary periods in a set order. Each major period, called a Mahadasha, is split into nine sub-periods called Antardashas, and each of those is split again into Pratyantardashas. That gives three levels of timing. A normal lifetime covers only part of the 120-year cycle.

The nine Mahadashas and how long each lasts

The sequence is always the same. Where you enter it depends on your Janma Nakshatra, the Moon's birth star. The nine lords and their durations are:

  • Ketu: 7 years. Sudden changes, spiritual intensity, endings and beginnings.
  • Venus (Shukra): 20 years, the longest. Relationships, creativity, wealth and the pleasures of the senses.
  • Sun (Surya): 6 years, the shortest. Identity, authority, the father, career and vitality.
  • Moon (Chandra): 10 years. The mind, emotions, the mother, home and changing circumstances.
  • Mars (Mangal): 7 years. Energy, courage, property, siblings and physical action.
  • Rahu: 18 years. Ambition, expansion, foreign links, material desire and karmic speed.
  • Jupiter (Guru): 16 years. Wisdom, spiritual growth, children, wealth and dharma.
  • Saturn (Shani): 19 years. Discipline, karmic reckoning, service and patient achievement.
  • Mercury (Budha): 17 years. Intellect, communication, business and analytical skill.

The nine periods add up to 120 years, after which the cycle begins again with Ketu. A life of 70 to 80 years covers only part of one cycle.

How your starting Dasha is worked out

At birth the Moon has already travelled part of the way through its Nakshatra, and the ruling planet of that Nakshatra decides your first Dasha. The part already travelled counts as time already passed in that planet's Mahadasha. Take a Moon at 10 degrees inside Rohini. Rohini is ruled by the Moon and covers 10 degrees to 23 degrees 20 minutes of sidereal Taurus, so a Moon at 20 degrees Taurus has covered 75% of it. You are born 75% of the way through the Moon Mahadasha, and 2 years 6 months of its 10 years remain. Mars Mahadasha follows.

From that starting point every later Mahadasha follows in the fixed order. To calculate your current Dasha you need your birth date, time and place, the same details a Kundli needs.

Reading a Mahadasha

The main rule of Dasha reading is that a planet can only deliver what its position in your birth chart supports. A weak, afflicted Jupiter in the 8th house will not give the results of a strong Jupiter in the 9th, even though both are Jupiter Mahadasha. The Dasha switches on what the chart already holds, and does not override it.

These are the main things to look at when judging a Mahadasha:

  • The planet's own strength: is it exalted, in its own sign, in a friendly sign or debilitated? How strong is it in Shadbala, the six-fold measure of planetary strength?
  • The house it sits in: a planet in the 10th brings career themes, in the 7th relationship themes, and in the 12th foreign travel, retreat or losses.
  • The houses it rules: being lord of the helpful houses (1, 5, 9) or of the difficult ones (6, 8, 12) shapes whether the period leans toward opportunity or obstacle.
  • Aspects and conjunctions: other planets that aspect or join the Mahadasha lord change its results. Benefics support it and malefics can complicate it.

Antardasha: the timing within the timing

Inside each Mahadasha the nine Antardashas follow the same order, and the first one belongs to the Mahadasha lord itself. Their lengths are in proportion to the Mahadasha lengths. In an 18-year Rahu Mahadasha, for example, the Rahu-Rahu Antardasha lasts about 2 years 8 months and the Rahu-Jupiter Antardasha about 2 years 5 months.

How an Antardasha plays out depends on where the Antardasha lord sits in the chart in relation to the Mahadasha lord, which houses each rules, and how strong each is. An astrologer weighs these together, so no simple rule such as "friend" or "enemy" settles it.

To see your own Mahadasha and Antardasha, generate your free Kundli, which shows the full Dasha timeline. To see which period you are in now, use our Dasha calculator.