In Vedic astrology, Dasha and Antardasha are systems used to predict the timing of events in an individual’s life. These are based on the Vimshottari Dasha system, which divides a person’s life into planetary periods (Mahadasha) and sub-periods (Antardasha). Here’s how the calculation works:
Steps for Dasha and Antardasha Calculation:
- Determine the Moon’s Nakshatra at Birth:
The Vimshottari Dasha system is based on the position of the Moon in a specific Nakshatra (lunar constellation) at the time of birth. Each Nakshatra is ruled by a planet. - Calculate the Balance Dasha at Birth:
The planetary period (Mahadasha) starts with the ruling planet of the Nakshatra where the Moon is placed. The remaining duration of the Mahadasha is calculated based on the Moon’s degree within the Nakshatra. - Divide the Mahadasha into Antardashas:
Each Mahadasha is divided into sub-periods (Antardashas) governed by the nine planets. The duration of each Antardasha is proportional to the planet’s Mahadasha period. - Sequence of Dashas:
The sequence of Dashas follows the order of planetary rulership:
Ketu → Venus → Sun → Moon → Mars → Rahu → Jupiter → Saturn → Mercury
Duration of Vimshottari Dasha Periods:
| Planet | Mahadasha Duration | Antardasha Duration |
|---|---|---|
| Ketu | 7 years | Proportional to 7 years |
| Venus | 20 years | Proportional to 20 years |
| Sun | 6 years | Proportional to 6 years |
| Moon | 10 years | Proportional to 10 years |
| Mars | 7 years | Proportional to 7 years |
| Rahu | 18 years | Proportional to 18 years |
| Jupiter | 16 years | Proportional to 16 years |
| Saturn | 19 years | Proportional to 19 years |
| Mercury | 17 years | Proportional to 17 years |
Example:
If the Moon is in the Nakshatra ruled by Venus at birth, the Mahadasha starts with Venus. If the Moon is halfway through the Nakshatra, the balance Mahadasha will be 10 years (half of Venus’s 20-year period). The Antardashas within Venus’s Mahadasha will follow the sequence of planetary rulership.
Online Tools for Calculation:
You can use online calculators to determine your Dasha and Antardasha periods based on your birth details. For example, you can explore tools like AstroSage’s Dasha Calculator or Astrology Seek’s Antar Dasha Calculator.
