Dasha Calculator
See your complete Vimshottari Dasha timeline based on your Moon's Nakshatra. Know which planetary period is active now and what lies ahead in your Mahadasha, Antardasha, and Pratyantardasha cycles.
What is Vimshottari Dasha?
Vimshottari Dasha is the most widely used planetary period system in Vedic astrology. It maps out a 120-year cycle divided among the 9 Vedic planets (Navagraha), with each planet ruling a specific number of years. The system reveals which planet's energy dominates different phases of your life.
The starting point of your Dasha cycle is determined by the Nakshatra (lunar mansion) your Moon occupied at birth. Each of the 27 Nakshatras is ruled by one of the 9 Dasha planets. The exact degree of the Moon within that Nakshatra determines how much of the first Mahadasha has already elapsed at the time of your birth, giving you a precise starting point in the cycle.
Unlike Western astrology's reliance on transits alone, the Dasha system provides a structured timeline of planetary influence unique to each individual — making it one of the most powerful predictive tools in Jyotish.
Mahadasha Periods — The 120-Year Cycle
Each planet rules a fixed number of years in the Vimshottari system. The sequence always follows this order:
| Planet | Duration | Ruling Nakshatras |
|---|---|---|
| Sun (Surya) | 6 years | Krittika, Uttara Phalguni, Uttara Ashadha |
| Moon (Chandra) | 10 years | Rohini, Hasta, Shravana |
| Mars (Mangal) | 7 years | Mrigashira, Chitra, Dhanishta |
| Rahu | 18 years | Ardra, Swati, Shatabhisha |
| Jupiter (Guru) | 16 years | Punarvasu, Vishakha, Purva Bhadrapada |
| Saturn (Shani) | 19 years | Pushya, Anuradha, Uttara Bhadrapada |
| Mercury (Budh) | 17 years | Ashlesha, Jyeshtha, Revati |
| Ketu | 7 years | Ashwini, Magha, Moola |
| Venus (Shukra) | 20 years | Bharani, Purva Phalguni, Purva Ashadha |
Total: 6 + 10 + 7 + 18 + 16 + 19 + 17 + 7 + 20 = 120 years
How Om.AI Calculates Your Dasha
Determines Your Birth Moon Nakshatra
Using your exact date, time, and place of birth, the app calculates the precise longitude of your Moon. This determines which of the 27 Nakshatras your Moon occupies and identifies the ruling planet that starts your Dasha cycle.
Computes the Balance of Dasha at Birth
The Moon's exact position within the Nakshatra determines how much of the first Mahadasha remains at birth. If your Moon is halfway through a Nakshatra ruled by Venus (20-year period), you start life with approximately 10 years of Venus Mahadasha remaining. This calculation requires arc-minute precision.
Generates Complete Timeline
From the starting balance, the app builds your full Dasha timeline — every Mahadasha, Antardasha (sub-period), and Pratyantardasha (sub-sub-period) with precise start and end dates. This gives you a complete map of planetary influences across your entire life.
What Each Mahadasha Means for Your Life
Each planet's Mahadasha brings its own themes and energy. Results vary based on the planet's strength and placement in your specific birth chart.
Sun Mahadasha (6 years)
Themes of authority, leadership, government connections, father, vitality, and self-confidence. A well-placed Sun brings recognition and career advancement. An afflicted Sun may bring ego conflicts or health issues related to the heart or bones.
Moon Mahadasha (10 years)
Focus on emotions, mind, mother, public life, travel, and nurturing. Strong Moon periods bring mental peace, popularity, and good relationships. A weak Moon may bring emotional turbulence, anxiety, or instability.
Mars Mahadasha (7 years)
Energy, courage, property, siblings, technical skills, and competitive drive. Well-placed Mars brings success in real estate, sports, engineering, or military. Afflicted Mars can cause accidents, conflicts, or legal issues.
Rahu Mahadasha (18 years)
One of the longest periods. Rahu brings unconventional growth, foreign connections, technology, sudden gains or losses, and worldly ambitions. Results depend heavily on Rahu's house placement and the sign it occupies. This period often brings unexpected life changes.
Jupiter Mahadasha (16 years)
Expansion, wisdom, spirituality, children, wealth, and higher education. Jupiter is a natural benefic — its Mahadasha often brings prosperity, marriage, childbirth, and spiritual growth. Even a moderately placed Jupiter tends to give protective results.
Saturn Mahadasha (19 years)
The longest Mahadasha. Saturn brings discipline, hard work, karma, longevity, service, and delayed but lasting results. Well-placed Saturn rewards patience with career stability and authority. Poorly placed Saturn can bring hardship, delays, and chronic health issues.
Mercury Mahadasha (17 years)
Communication, intelligence, business acumen, education, and analytical thinking. Mercury periods favor learning, trading, writing, and networking. Strong Mercury brings commercial success and intellectual achievement.
Ketu Mahadasha (7 years)
Spirituality, detachment, sudden insights, past-life karma, and liberation. Ketu periods often bring introspection, spiritual breakthroughs, and a desire to let go of material attachments. It can also bring unexpected health issues or sudden changes in direction.
Venus Mahadasha (20 years)
The longest single Mahadasha. Venus governs love, marriage, luxury, arts, vehicles, and material comforts. A strong Venus period brings romance, wealth, creative success, and enjoyment of life. Afflicted Venus may bring relationship difficulties or overindulgence.
Antardasha and Pratyantardasha
Each Mahadasha is divided into 9 Antardasha (sub-periods), one for each of the 9 planets. The Antardasha modifies the Mahadasha's effects — blending two planetary energies. For example, during a Jupiter Mahadasha, a Saturn Antardasha brings a mix of expansion (Jupiter) and discipline (Saturn), often manifesting as structured growth or career consolidation.
Each Antardasha further divides into 9 Pratyantardasha (sub-sub-periods), adding a third layer of planetary influence. At any given moment, three planetary energies are active in your Dasha system — Mahadasha, Antardasha, and Pratyantardasha — creating a highly specific planetary signature for each phase of your life.
Om.AI calculates all three levels and displays them in your birth chart section, so you can see exactly which planetary combination is active right now and what transitions are coming up.
How to Check Your Current Dasha
Download Om.AI
Get the app from Google Play or the App Store.
Enter Your Birth Details
Provide your date of birth, exact time of birth, and place of birth. Accurate birth time is especially important for Dasha calculations, as even a few minutes can shift the balance of Dasha at birth.
View Your Dasha Timeline
Your complete Vimshottari Dasha timeline appears in the birth chart section of the app. See your current Mahadasha, Antardasha, and Pratyantardasha along with start and end dates for each period. You can also ask the AI chat specific questions about what your current Dasha period means for career, relationships, health, or any other life area.
See Your Dasha Timeline
Download Om.AI, enter your birth details, and instantly see which planetary period is shaping your life right now — and what's coming next.
Frequently Asked Questions
What is Vimshottari Dasha?
Vimshottari Dasha is the most widely used planetary period system in Vedic astrology. It is a 120-year cycle divided among 9 planets, each ruling a specific number of years. The starting point of your Dasha cycle is determined by the Nakshatra your Moon occupied at the time of birth. Each Mahadasha is further divided into sub-periods called Antardasha and Pratyantardasha.
How is the starting Dasha calculated?
Your starting Dasha is determined by the Nakshatra (star) your Moon was in at birth. Each of the 27 Nakshatras is ruled by one of the 9 Dasha planets. The proportion of the Nakshatra already traversed by the Moon at your birth time determines how much of that planet's Mahadasha has already elapsed, giving you a precise starting point in the 120-year cycle.
How do I check my current Dasha period?
Download Om.AI from the App Store or Google Play, enter your date, time, and place of birth, and the app automatically calculates your complete Vimshottari Dasha timeline. You can see your current Mahadasha, Antardasha, and Pratyantardasha periods in the birth chart section of the app.
What is the difference between Mahadasha and Antardasha?
Mahadasha is the major planetary period lasting several years (e.g., Jupiter Mahadasha lasts 16 years). Antardasha is a sub-period within the Mahadasha — each Mahadasha contains 9 Antardashas ruled by all 9 planets in sequence. The Antardasha modifies the Mahadasha's effects. For example, during Jupiter Mahadasha, a Venus Antardasha blends Jupiter's expansion with Venus's themes of relationships and luxury.
Does Dasha alone determine life events?
No. Dasha indicates the timing and planetary influence active in your life, but the actual results depend on how strong and well-placed those planets are in your birth chart. A Jupiter Mahadasha gives different results for someone with Jupiter exalted in Cancer versus Jupiter debilitated in Capricorn. Transits (gochar) also modify Dasha results. Om.AI considers all these factors together.
Can Om.AI predict events during my current Dasha?
Yes. You can ask the AI specific questions about your current or upcoming Dasha periods. The AI analyzes the Dasha lord's placement, strength, and house lordship in your birth chart, overlays current transits, and provides timing-specific insights. You get an initial question included, and can earn additional questions through daily reading streaks. Question packs and Premium subscriptions (with unlimited questions) are also available.