Vimshottari dasha explained — the planetary periods of your life

If a kundali shows what promises are in a chart, the dasha system shows when they are likely to become active. Of the many dasha systems in Vedic astrology, Vimshottari (“of 120”) is by far the most widely used. Parashara describes it in the Brihat Parashara Hora Shastra, and almost every Indian astrologer starts their timing here.

The 120-year cycle

Vimshottari divides an ideal human life of 120 years among the nine grahas. Each planet rules one period, called a mahadasha, and the periods always run in the same order:

Order	Graha	Mahadasha length
1	Ketu	7 years
2	Shukra (Venus)	20 years
3	Surya (Sun)	6 years
4	Chandra (Moon)	10 years
5	Mangal (Mars)	7 years
6	Rahu	18 years
7	Guru (Jupiter)	16 years
8	Shani (Saturn)	19 years
9	Budh (Mercury)	17 years
	Total	120 years

After Mercury the sequence returns to Ketu. Nobody lives through all nine periods from the start — where you enter the cycle depends on your Moon.

Where your dasha starts: the Moon’s nakshatra

Each of the 27 nakshatras is ruled by one of the nine grahas, in the same Vimshottari order, repeating three times:

• Ketu: Ashwini, Magha, Mula
• Venus: Bharani, Purva Phalguni, Purva Ashadha
• Sun: Krittika, Uttara Phalguni, Uttara Ashadha
• Moon: Rohini, Hasta, Shravana
• Mars: Mrigashira, Chitra, Dhanishta
• Rahu: Ardra, Swati, Shatabhisha
• Jupiter: Punarvasu, Vishakha, Purva Bhadrapada
• Saturn: Pushya, Anuradha, Uttara Bhadrapada
• Mercury: Ashlesha, Jyeshtha, Revati

The lord of your janma nakshatra (the nakshatra the Moon was in at birth) rules your first mahadasha.

But you are rarely born at the very start of that period. Each nakshatra spans 13°20’. If the Moon had already crossed part of it, that same fraction of the mahadasha is treated as “already used up” before birth. The remainder is called the balance of dasha at birth.

Example. Our reference chart (born 12 August 1991, 6:45 am, Jodhpur) has the Moon in Purva Phalguni, pada 3. Purva Phalguni is ruled by Venus, so life begins in the Venus mahadasha. Pada 3 covers the stretch from 6°40’ to 10°00’ within the nakshatra, meaning half to three-quarters of it had been crossed — so roughly 5 to 10 of Venus’s 20 years remained at birth. The exact balance comes from the Moon’s precise degree, which the engine calculates. After Venus comes the Sun (6 years), then the Moon (10 years), and so on.

Antardasha: periods within periods

Each mahadasha is divided into nine antardashas (sub-periods, also called bhukti), one for each graha. The first antardasha belongs to the mahadasha lord itself, and the rest follow the usual order. Their lengths are proportional:

antardasha length = mahadasha years × antardasha planet’s years ÷ 120

For a 16-year Jupiter mahadasha this gives:

Antardasha	Length (approx.)
Jupiter–Jupiter	2 y 1 m 18 d
Jupiter–Saturn	2 y 6 m 12 d
Jupiter–Mercury	2 y 3 m 6 d
Jupiter–Ketu	11 m 6 d
Jupiter–Venus	2 y 8 m
Jupiter–Sun	9 m 18 d
Jupiter–Moon	1 y 4 m
Jupiter–Mars	11 m 6 d
Jupiter–Rahu	2 y 4 m 24 d

The nine pieces add up to exactly 16 years. The same rule divides each antardasha into nine pratyantardashas, and so on, for finer timing.

You may notice that different software gives dates a few days or weeks apart. That usually comes from small choices — the ayanamsa used, and whether a “dasha year” is counted as 365.25 days or 360 days. The sequence of periods never changes.

How to read your current dasha

A common mistake is to treat each planet as simply “good” or “bad” — “Saturn’s dasha will be terrible”, “Venus will bring luxury”. Classical rules look at the planet’s situation in your chart:

• Which houses it occupies and rules. A planet ruling your 10th house will tend to bring career matters forward during its period.
• Its strength and dignity — exalted, in its own sign, debilitated, combust, retrograde.
• Its relationships — which planets it sits with or aspects, and how it relates to the lagna lord.
• The antardasha lord, and how the two planets relate to each other.
• Transits (gochar) during the period, especially of Saturn and Jupiter.

So Saturn’s mahadasha might be a period of steady promotions for one person and of slow, patient rebuilding for another. Neither is a punishment.

Using dashas wisely

Dashas are a way to understand the themes of a season of life: when to focus on studies, on family, on career, on inner work. They are not a countdown to a fixed event. If anyone uses your dasha to predict illness or death, or pressures you into costly remedies, please seek a second opinion — that is not what the tradition is for.

In the AstroSimply app, your Kundali screen shows your full Vimshottari timeline with mahadasha and antardasha dates, and you can ask the AI guide what your current period emphasises — it will cite the rules it uses, such as Parashara’s descriptions of each dasha.