Calculate your active Mahadasha, Antardasha, starting balance, and 120-year planetary timeline using verified Swiss Ephemeris astronomy calibrated to Jagannatha Hora desktop accuracy.
Enter your birth details to calculate your planetary periods.
| Planet | Span | Starts (UTC) | Ends (UTC) | Status |
|---|
| Antardasha | Starts (UTC) | Ends (UTC) | Guide |
|---|
Get your dedicated Career & Work Dossier, or complete birth chart dossier with Dashamsha (D-10) analysis, Amatyakaraka, and dated Vimshottari windows for career pivots and ventures.
Before you order
Vimshottari Dasha (from Sanskrit vimshottari, meaning 120) is the foundational timing system of Parashari Jyotish. It maps human life across a 120-year cycle apportioned between nine celestial rulers: Ketu (7y), Venus (20y), Sun (6y), Moon (10y), Mars (7y), Rahu (18y), Jupiter (16y), Saturn (19y), and Mercury (17y). Each major period (Mahadasha) is divided into nine sub-periods (Antardashas), timing when latent planetary potentials in your natal chart become active reality.
Your starting dasha is determined entirely by the longitudinal coordinate of the natal Moon at birth. The 360° zodiac is partitioned into 27 Nakshatras of 13°20′ each, ruled sequentially by the nine planets. The percentage of the Moon’s birth Nakshatra already traversed determines how much of that planetary ruler’s period has elapsed, and the remaining span constitutes your starting dasha balance.
Two mathematical factors cause discrepancies across tools: 1) Ayanamsa discrepancy (popular tools use approximations that shift the Moon longitude by up to 1°, moving starting dasha dates by months or years), and 2) Solar vs 360-day Savana year calculation. Astrodai calculations use the Swiss Ephemeris C engine and true sidereal Lahiri / Chitrapaksha coordinates calibrated for exact congruence with Windows Jagannatha Hora (JHora).
The Mahadasha establishes the overarching macro-theme and background environment of your life for years. The Antardasha provides tactical focus (weeks to months), filtering how the Mahadasha lord expresses its karmic agenda. The Pratyantardasha (3rd level) and Sookshmadasha (4th level) pinpoint day-to-day turning points, contract signings, and major relocations.
Astrodai calculations bridge two rigorous traditions: verified classical critical editions from our literature archives, and modern NASA-grade computational ephemerides. Every finding is checkable, transparent, and built for rational inquiry.
Core Rule: Planetary periods (Mahadashas) unfold in a strict 120-year sequence seeded by the Moon’s exact sidereal nakshatra coordinate at birth.
Core Rule: A dasha period reflects the functional dignity and house ownership of its governing planet, delivering results proportional to divisional chart strength.
Mechanism: Calculates dasha sub-periods using exact solar calendar degrees, eliminating the multi-month drift created by simplistic 360-day approximations.
Mechanism: Compiles the 120-year timeline into structured Markdown with explicit prompt bounds for Claude, ChatGPT, and Obsidian.
Calculate a sidereal birth chart with 23 divisional charts, planetary strengths and dated Vimshottari periods calibrated to JHora accuracy.
Enter your recorded birth date, local birth time and birthplace. Results use the selected birth moment and location.
A question is welcome
Start with the free example. If you’re unsure about your birth time, the right file, or using it with AI, ask before you buy.