Planetary Periods

Vimshottari vs
Ashtottari Dasha

Two ancient timing systems for life predictions. Understand the 120-year vs 108-year cycles.

Planetary Period Lengths

Vimshottari (120 Years)

Ketu
7 yrs
Venus
20 yrs
Sun
6 yrs
Moon
10 yrs
Mars
7 yrs
Rahu
18 yrs
Jupiter
16 yrs
Saturn
19 yrs
Mercury
17 yrs
Total: 120 years

Ashtottari (108 Years)

Sun
6 yrs
Moon
15 yrs
Mars
8 yrs
Mercury
17 yrs
Saturn
10 yrs
Jupiter
19 yrs
Venus
21 yrs
Rahu
12 yrs
Total: 108 years (Ketu excluded)

Side-by-Side Comparison

AspectVimshottariAshtottari
Total Cycle120 years108 years
Planets Included9 (all Grahas including Rahu/Ketu)8 (excludes Ketu)
Starting PointMoon's Nakshatra at birthMoon's Nakshatra at birth
ApplicabilityUniversal (all births)Night births in Krishna Paksha
PopularityMost widely usedRegional/specific use
Sub-periodsAntardasha, PratyantardashaAntardasha, Pratyantardasha
Longest PeriodVenus (20 years)Venus (21 years)
Shortest PeriodSun (6 years)Sun (6 years)

When to Use Each System

Use Vimshottari When:

  • You want the most widely-used standard system
  • Born during daytime (sunrise to sunset)
  • You need analysis of Rahu and Ketu periods
  • Following mainstream Vedic astrology texts

Use Ashtottari When:

  • Born at night during Krishna Paksha (waning Moon)
  • You want to cross-reference Vimshottari predictions
  • Following specific South Indian traditions
  • Prefer analysis without shadow planets

Frequently Asked Questions

Which Dasha system should I use?

Vimshottari is the most commonly used and is applicable universally. Ashtottari is traditionally recommended for night births (between sunset and sunrise) with Moon in Krishna Paksha (waning phase), though many astrologers use Vimshottari for all charts.

Why is Vimshottari 120 years when humans don't live that long?

The 120-year cycle represents a complete cosmic cycle, not human lifespan. Your Dasha sequence starts from your Moon's Nakshatra at birth, so you experience only a portion of the full cycle based on when you were born.

Why doesn't Ashtottari include Rahu and Ketu?

Ashtottari Dasha excludes the shadow planets (Rahu and Ketu) and focuses on the seven visible grahas plus the Moon. This gives more weight to the physical planets that are directly observable.

Can both Dasha systems give accurate predictions?

Yes, both systems have been used successfully for thousands of years. The key is consistent application. Many astrologers primarily use Vimshottari while cross-referencing Ashtottari for additional insights.

How do I calculate my current Dasha period?

Dasha calculation requires your exact Moon Nakshatra position at birth. My Kundli AI automatically calculates both Vimshottari and Ashtottari Dashas when you generate your Kundli.

Calculate Your Dasha Periods

My Kundli AI calculates both Vimshottari and Ashtottari Dashas automatically. See your current planetary period and future predictions.

Open Dasha Calculator