Dasha Calculator

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Quick Answer: Vimshottari Dasha is a 120-year planetary period system in Vedic astrology that predicts life events based on your Moon's nakshatra at birth. Each of the 9 planets rules a period of 6-20 years, creating a personalized timing map for your life.

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What is Vimshottari Dasha?

Key Facts: Vimshottari Dasha

Total cycle length: 120 years
Number of planetary periods: 9 (Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury)
Calculation basis: Moon's nakshatra position at birth
Classical source: Brihat Parashara Hora Shastra, Chapters 46-48
Birth time accuracy needed: Within 2-4 minutes for precise dates

Vimshottari Dasha (विंशोत्तरी दशा) is a 120-year planetary period system in Vedic astrology that divides life into sequential phases ruled by nine celestial bodies, each lasting between 6 and 20 years.

Think of it this way: If your birth chart is the map of your life, Vimshottari Dasha is the GPS that tells you when you'll arrive at each destination. Unlike Western astrology's transits that affect everyone similarly, Dasha periods are calculated specifically from YOUR Moon's position—making it uniquely personal.

Classical Sources: The Vimshottari system is detailed in the Brihat Parashara Hora Shastra (Chapters 46-48), composed by Maharishi Parashara over 4,000 years ago. Additional interpretive guidance appears in Phaladeepika by Mantreswara (13th century) and Jataka Parijata by Vaidyanatha Dikshita (14th century).

The Three Main Dasha Levels

Mahadasha

Major Period

6-20 years

Establishes the primary theme of your life chapter. Think of it as the season of your experience—the overarching energy that colors everything.

Antardasha

Sub-Period (Bhukti)

Months to Years

Activates specific results within the Mahadasha theme. Brings events, opportunities, and experiences aligned with its planetary nature.

Pratyantardasha

Sub-Sub Period

Weeks to Months

Refines timing for specific decisions and events. Used for precise prediction of when themes will manifest.

The Nine Planetary Periods

Planet	Years	Life Themes & Significations
Sun (Surya) सूर्य	6	Leadership, father figures, authority, self-confidence, health & vitality
Moon (Chandra) चन्द्र	10	Mind, emotions, mother, intuition, travel, nourishment, public life
Mars (Mangal) मंगल	7	Energy, courage, land & property, surgery, competitive drive
Mercury (Budh) बुध	17	Communication, learning, business, nervous system, mathematics
Jupiter (Guru) गुरु	16	Wisdom, teachers, dharma, children, fortune, expansion
Venus (Shukra) शुक्र	20	Love, marriage, vehicles, luxury, creativity, arts
Saturn (Shani) शनि	19	Discipline, hard work, career, longevity, delays, separation
Rahu (Rahu) राहु	18	Ambition, unconventional paths, foreign connections, transformation
Ketu (Ketu) केतु	7	Spirituality, moksha, past karma, sudden events

Ready to Know Your Planetary Timing?

Discover which planet is ruling your life right now—and understand the themes of your current phase.

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Frequently Asked Questions

What is Vimshottari Dasha?

Vimshottari Dasha is a 120-year planetary period system in Vedic astrology. It divides life into 9 sequential periods ruled by different planets: Ketu (7 years), Venus (20 years), Sun (6 years), Moon (10 years), Mars (7 years), Rahu (18 years), Jupiter (16 years), Saturn (19 years), and Mercury (17 years). The system predicts timing of major life events based on the Moon's nakshatra position at birth.

How do I calculate my current Dasha period?

To calculate your current Dasha: 1) Determine Moon's nakshatra at birth from your birth time and location, 2) Find the ruling planet of that nakshatra—this is your starting dasha lord, 3) Calculate the remaining portion of the first dasha based on Moon's exact degree within the nakshatra, 4) Follow the fixed sequence for subsequent periods. Our calculator does this instantly with your birth details.

What is the difference between Mahadasha and Antardasha?

Mahadasha is the major planetary period lasting 6-20 years that sets the overall life theme, while Antardasha is a sub-period within the Mahadasha lasting several months to a few years. Think of Mahadasha as chapters of your life and Antardasha as paragraphs within those chapters. For example, during Jupiter Mahadasha (16 years), you experience all 9 Antardashas, each modifying Jupiter's themes.

Do I need exact birth time for Dasha calculations?

Yes, accurate birth time within 2-4 minutes is essential. The Dasha system is based on Moon's exact degree position, which changes approximately 1 degree every 2 hours. Even a 15-minute birth time error can shift Dasha period start dates by weeks or months.

Which Dasha is good for marriage?

Venus Mahadasha and Jupiter periods are traditionally favorable for marriage in Vedic astrology. Venus rules love and partnerships, while Jupiter represents commitment and dharma. However, results depend on Venus and Jupiter's placement and dignity in YOUR specific birth chart—the same dasha manifests differently for each person.

Why is my Dasha different from Western astrology transits?

Dashas are calculated from your Moon's birth position and follow a fixed 120-year sequence unique to YOU. Western transits show current planetary positions affecting everyone similarly. Dashas reveal YOUR personal timing cycle, making predictions more specific than generic daily horoscopes.

What are Sookshma and Pran Dasha?

Sookshma Dasha (4th level) and Pran Dasha (5th level) are finer subdivisions within Pratyantardasha, lasting days and hours respectively. They're primarily used for muhurta (electional astrology) to select auspicious moments for important activities like weddings or business launches.

What classical texts describe the Dasha system?

The Vimshottari Dasha system is detailed in the Brihat Parashara Hora Shastra (BPHS), Chapters 46-48, composed over 4,000 years ago. Additional interpretive guidance appears in Phaladeepika by Mantreswara (13th century) and Jataka Parijata by Vaidyanatha Dikshita (14th century).

Our Calculation Methodology

This dasha calculator uses the traditional Vimshottari Dasha system as prescribed in the Brihat Parashara Hora Shastra (Chapters 46-48). Calculations are based on the Moon's precise nakshatra position at birth, using Swiss Ephemeris astronomical data (DE431 JPL) with Lahiri Ayanamsa—the official standard adopted by the Indian government.

"The Vimshottari Dasha, based on the 120-year cycle, is applicable to all beings and gives the most accurate results."
— Brihat Parashara Hora Shastra, Chapter 46

Why Vimshottari? Among the 42 dasha systems described by Parashara, Vimshottari is considered the most universally applicable. It was specifically recommended for the Kaliyuga era (current age), as the 120-year cycle aligns with expected human lifespan in this period.

Dasha Calculator

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What is Vimshottari Dasha?

Key Facts: Vimshottari Dasha

The Three Main Dasha Levels

Mahadasha

Antardasha

Pratyantardasha

The Nine Planetary Periods

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Frequently Asked Questions

Our Calculation Methodology

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