A Dasha is a planetary period — a span of time ruled by a specific Graha. The Vimshottari Dasha system ("Dasha of 120") is the most widely used timing system in Vedic astrology. It divides an entire lifetime into major periods (Maha Dasha), each governed by one of the nine Grahas. The sequence and starting point are determined by the Moon's Nakshatra at birth.

The concept is rooted in Parashari Jyotish: each planet "rules" certain years of your life, activating the houses it owns and occupies in your birth chart. During a planet's Dasha, that planet becomes the primary driver of events — its strength, placement, and associations colour everything from career to health to relationships.

The nine Maha Dashas follow a fixed sequence, each lasting a specific number of years. The total cycle spans 120 years. The sequence follows the Nakshatra lords in Vimshottari order: Ketu (7) → Venus (20) → Sun (6) → Moon (10) → Mars (7) → Rahu (18) → Jupiter (16) → Saturn (19) → Mercury (17).

Why 120 years? Parashari texts define a full human lifespan as 120 years (Param Ayush). The number has mathematical elegance — it allows clean fractional division across 9 planets for sub-period calculations. The system is prescribed for all charts where the Moon is strong; when the Moon is weak (e.g., in the 6th/8th house or heavily afflicted), some astrologers prefer alternative systems.

Each of the 27 Nakshatras is ruled by one of the 9 Dasha planets. The 27 Nakshatras are divided into 3 groups of 9, and each group cycles through the same sequence: Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury. Your birth Nakshatra's ruler determines which Maha Dasha is running at birth.

Your Dasha starting point depends on the Moon's exact position in its Nakshatra at birth. The Nakshatra lord determines which Dasha you're born into, and the Moon's progress through that Nakshatra determines how much of that Dasha remains.

Let us walk through a complete example. Suppose someone is born with Moon at 14 degrees 30 minutes in Aries.

Each Maha Dasha is subdivided into 9 Antardashas (sub-periods), which follow the same Vimshottari sequence starting from the Maha Dasha lord. Each Antardasha is further divided into 9 Pratyantardashas, and so on for even finer timing (Sookshma, Prana). Our software calculates down to the Antardasha level.

The hierarchy of precision: Maha Dasha (years) → Antardasha (months) → Pratyantardasha (weeks) → Sookshma Dasha (days) → Prana Dasha (hours). For most practical predictions, the Maha Dasha and Antardasha combination is sufficient. The Pratyantardasha is used for precise event timing — pinpointing the exact month or week when something manifests.

While Vimshottari is the most widely used, Jyotish texts describe over 40 dasha systems. Each has specific conditions when it is most appropriate:

A Dasha period activates the planet's significations based on its placement in your chart. The results depend on: (1) Which houses the Dasha lord owns, (2) Which house it occupies, (3) Which planets it's associated with or aspected by, (4) Its strength (exalted, debilitated, combust, etc.), and (5) The Antardasha lord's relationship to the Maha Dasha lord.

To find your current Dasha, generate your Kundali on this site and navigate to the Dashas tab. The system automatically calculates your complete Vimshottari Dasha timeline from birth based on your Moon's Nakshatra position. The currently active Maha Dasha is highlighted, along with the running Antardasha within it. You can see past periods and future ones stretching across your entire 120-year cycle.

Pay attention to the transition dates between Maha Dashas and between Antardashas — these are the periods of maximum change and adjustment. If you are near a Dasha transition (within 6-12 months), the themes of both the outgoing and incoming Dasha lord will be active simultaneously, creating a blended period.

Each Maha Dasha is divided into 9 Antardashas proportional to each planet's total Dasha years. The formula is: Antardasha duration = (Maha Dasha years x Antardasha planet years) / 120. The sequence starts with the Maha Dasha lord's own Antardasha, then follows the Vimshottari order.

Each Maha Dasha lord activates its core significations. The actual results depend on the planet's chart placement, but these are the universal themes each planet tends to emphasize during its rule:

Dasha Sandhi (junction) is the transition period between two Maha Dashas — typically the last few months of the outgoing Dasha and the first few months of the incoming one. This period is often turbulent because the native is simultaneously experiencing the winding down of one planetary energy and the activation of a completely different one. The contrast can be disorienting.

The degree of turbulence depends on how different the two Dasha lords are. A transition from Jupiter to Saturn (wisdom to discipline) or from Venus to Sun (luxury to authority) creates more friction than Jupiter to Mercury (both intellectual planets). During Sandhi, avoid major life decisions if possible — let the new energy settle before committing to irreversible choices.

Certain life events are strongly correlated with specific Dasha periods. While the exact outcome depends on the chart, experienced astrologers look for these classical combinations when timing events: