In one paragraph
Vimshottari dasha is the main timing system of Vedic astrology. It divides a notional life of 120 years into nine planetary periods of unequal length, always in the same order. Which period you are born into, and how much of it is left, is decided by the nakshatra the Moon occupied at your birth. Each major period (mahadasha) is then subdivided into nine sub-periods (antardashas), giving a timeline that says when the promises in a chart are likely to unfold.
The nine periods
| Order | Dasha lord | Years | Starts here if your Moon is in |
|---|---|---|---|
| 1 | Ketu | 7 | Ashwini, Magha, Mula |
| 2 | Venus | 20 | Bharani, Purva Phalguni, Purva Ashadha |
| 3 | Sun | 6 | Krittika, Uttara Phalguni, Uttara Ashadha |
| 4 | Moon | 10 | Rohini, Hasta, Shravana |
| 5 | Mars | 7 | Mrigashira, Chitra, Dhanishtha |
| 6 | Rahu | 18 | Ardra, Swati, Shatabhisha |
| 7 | Jupiter | 16 | Punarvasu, Vishakha, Purva Bhadrapada |
| 8 | Saturn | 19 | Pushya, Anuradha, Uttara Bhadrapada |
| 9 | Mercury | 17 | Ashlesha, Jyeshtha, Revati |
Why the periods are in this order
The order — Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury — is the order in which the planets rule the nakshatras. Every nakshatra has a ruling planet, the nine rulers repeat three times round the zodiac, and the dasha sequence simply follows them.
That is the whole link between your chart and your timeline. If the Moon was in Bharani, Purva Phalguni or Purva Ashadha when you were born, your life begins in the Venus period. If it was in Pushya, Anuradha or Uttara Bhadrapada, it begins in Saturn's.
The balance of dasha at birth
You are not born at the start of a period. How far the Moon had already travelled through its nakshatra tells you how much of the first period was used up before birth.
An example. Suppose the Moon was at 16°40′ of Taurus. Rohini runs from 10°00′ Taurus to 23°20′ Taurus, so the Moon was exactly half-way through it. Rohini is ruled by the Moon, whose period lasts 10 years. Half of it had notionally elapsed, so this person is born with 5 years of Moon dasha remaining. After that comes Mars for 7 years, and the sequence continues in order from there.
This is why two people born a day apart can have their dashas years out of step, and why the Moon's exact position — and therefore the birth time — matters for timing.
Antardashas: the sub-periods
Each mahadasha is divided among all nine planets again. These sub-periods are called antardashas, or bhuktis. A mahadasha always opens with its own planet's antardasha and then follows the standard order.
The length of an antardasha is proportional to both planets: multiply the years of the mahadasha planet by the years of the antardasha planet and divide by 120. Venus has 20 years and the Sun 6, so the Sun's antardasha within the Venus mahadasha lasts 20 × 6 ÷ 120 = 1 year. The Sun's own antardasha in the Sun mahadasha lasts 3 months and 18 days.
| Sub-period | Length |
|---|---|
| Venus – Venus | 3 yr 4 mo |
| Venus – Sun | 1 yr |
| Venus – Moon | 1 yr 8 mo |
| Venus – Mars | 1 yr 2 mo |
| Venus – Rahu | 3 yr |
| Venus – Jupiter | 2 yr 8 mo |
| Venus – Saturn | 3 yr 2 mo |
| Venus – Mercury | 2 yr 10 mo |
| Venus – Ketu | 1 yr 2 mo |
The same division can be carried further — into pratyantardashas within each antardasha, and finer still — to narrow timing down to months and weeks. Each level uses the same proportional rule.
How a dasha is read
A dasha does not have a fixed meaning. "Saturn mahadasha" is not good or bad in itself. The period delivers what its planet signifies in your particular chart: the houses it rules, the house it sits in, its dignity, the planets that join or aspect it.
So a Jupiter period is a time of expansion in whichever areas Jupiter governs for you. For one person that is career and children; for another it is debt and relocation. The antardasha planet then modifies it. Periods in which the two planets are friends, well placed from each other and both strong tend to run smoothly; periods linking a planet to the lord of a difficult house tend to bring that house's themes forward.
Transits are read against this background. A transit usually produces a noticeable event only when the running dasha supports the same theme.
Other dasha systems
Vimshottari — the name means "120" — is the system given most prominence by Parashara and is the default almost everywhere. Others exist and are used alongside it: Ashtottari, a 108-year cycle; Yogini, a short 36-year cycle; and the sign-based Chara dasha of the Jaimini school. An astrologer may consult a second system to confirm what the first suggests.
One technical variation is worth knowing about: a few practitioners count dasha years as 360 days rather than as solar years. Over several decades the two methods drift apart by months, which can explain why dates from two sources disagree.
Frequently asked questions
- How do I know which dasha I am running?
- It is calculated from the Moon's exact position in its nakshatra at your birth. The ruling planet of that nakshatra gives your first period, the Moon's progress through the nakshatra gives the balance remaining, and the standard order gives everything after it.
- How long is each mahadasha?
- Ketu 7 years, Venus 20 years, Sun 6 years, Moon 10 years, Mars 7 years, Rahu 18 years, Jupiter 16 years, Saturn 19 years, Mercury 17 years — 120 years in all.
- Is Rahu or Saturn mahadasha always difficult?
- No. Every period delivers the results of its planet as that planet is placed in your chart. Saturn and Rahu periods are often when people build careers and lasting structures. Dignity, house rulership and the antardasha in force matter far more than the planet's reputation.
- What is the difference between mahadasha and antardasha?
- A mahadasha is one of the nine major periods, lasting between 6 and 20 years. An antardasha is one of nine sub-periods inside it. Results are read from the combination of the two planets.
- Does everyone go through all nine dashas?
- No. The full cycle is 120 years, so most people experience five to seven of the nine periods, depending on where the cycle started for them.
Work it out for yourself
These tools compute what this guide explains, from real astronomical positions.
- Kundli →Your full mahadasha and antardasha timeline with dates.
- Year-Ahead Forecast →The next twelve months from your running dasha and transits.
How this guide was written
The reference tables on this page are generated from the same data Astronaad’s calculators run on, so the guide and the tools cannot disagree. Where classical authorities differ, the text says so and names the convention Astronaad follows. Astrology is a traditional system of interpretation: nothing here is medical, legal or financial advice. Spotted an error? Tell us.