Dashas: the planetary periods that time your life
A 120-year cycle divided among nine planets — the most distinctive timing system in astrology.
4 min read · Published 22 August 2026
The short answer
The Vimshottari dasha divides a notional 120-year lifespan among the nine grahas in a fixed sequence, each ruling for a set number of years: Ketu 7, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19, Mercury 17. Which period you are born into, and how far through it, is determined by your Moon's nakshatra. Each mahadasha subdivides into antardashas and further still, producing a timing framework of considerable precision — and no validation.
The nine periods
| Order | Graha | Years |
|---|---|---|
| 1 | Ketu | 7 |
| 2 | Venus | 20 |
| 3 | Sun | 6 |
| 4 | Moon | 10 |
| 5 | Mars | 7 |
| 6 | Rahu | 18 |
| 7 | Jupiter | 16 |
| 8 | Saturn | 19 |
| 9 | Mercury | 17 |
The order never changes and the sequence is cyclical — after Mercury it returns to Ketu. What differs between people is where in the cycle you start and how much of that first period had already elapsed at your birth.
The word vimshottari means one hundred and twenty, which is the total and the notional maximum lifespan the system assumes.
How your starting point is set
By your Moon's nakshatra. Each of the 27 nakshatras has a ruling planet, cycling through the nine in the same Vimshottari order, three times over.
Whichever planet rules the nakshatra your Moon occupied at birth gives you your starting mahadasha. And critically, how far through that nakshatra the Moon had travelled determines how much of that period had already elapsed before you were born.
So someone born with the Moon at the very start of an Ashwini nakshatra begins with a full seven years of Ketu. Someone born with the Moon near the end of Ashwini begins partway through Ketu with only months of it remaining.
This is why nakshatra precision matters so much, and why a birth time is close to essential — the Moon crosses roughly one nakshatra a day, so a few hours' error can shift your entire life timeline by years.
The subdivisions
Each mahadasha divides into nine antardashas — sub-periods ruled by each of the nine planets in the same order, proportional to their main-period lengths. A twenty-year Venus mahadasha contains a Venus-Venus antardasha, a Venus-Sun, a Venus-Moon and so on.
Each antardasha divides again into pratyantardashas, and those divide again. Practitioners commonly work three or four levels deep, producing periods measured in weeks or days.
The combination of two or three planets is what a reading interprets: a Jupiter mahadasha with a Saturn antardasha is read as expansion meeting constraint, and the reading depends on how those two planets sit in the natal chart.
Why Western astrology has nothing like it
This is the clearest structural difference between the two traditions, more consequential than the zodiac shift.
Western timing uses transits — where planets are now against where they were at birth — plus secondary progressions and solar returns. All of these are continuous and gradual; nothing carves a life into named blocks.
Dashas are discrete. You are in a Saturn period or you are not, and it began on a specific date. That gives Jyotisha a confidence about life stages that Western astrology structurally cannot match, and it is a large part of why Vedic readings feel more definite.
Whether definiteness is a virtue depends on whether the predictions land, which brings us to the honest part.
The honest assessment
No study has tested dasha predictions against outcomes at scale, and the structure makes such a test difficult: with nine planets, multiple subdivision levels and a natal chart to condition on, almost any event can be fitted to some active period afterwards.
The system is also fully determined — your entire dasha timeline is fixed at birth and computable to the day for the next 120 years. That is an unusually strong claim, and it is worth noticing that a framework generating a complete life schedule from a Moon position is asserting something far more specific than most Western astrology attempts.
AsterNym does not compute dashas, because it does not compute sidereal positions at all. For those you want a Jyotisha tool — see Far Far Away astrology for one example.
Common questions
- What is a dasha in Vedic astrology?
- A planetary period. The Vimshottari dasha system divides a notional 120-year lifespan among the nine grahas in a fixed sequence — Ketu 7 years, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19 and Mercury 17.
- How is my dasha sequence determined?
- By the nakshatra your Moon occupied at birth. That nakshatra's ruling planet gives your starting period, and how far the Moon had travelled through the nakshatra determines how much of that period had already elapsed when you were born.
- What is an antardasha?
- A sub-period within a mahadasha. Each main period divides into nine antardashas ruled by each planet in the same sequence, proportional to their main-period lengths, and these subdivide further into pratyantardashas and beyond.
- Does Western astrology have dashas?
- No. Western timing uses transits, secondary progressions and solar returns, which are continuous and gradual. Nothing in Western practice divides a life into discrete named planetary periods the way the dasha system does.