Mahadasha Calculator — Vimshottari Dasha, Antardasha and Pratyantar Dasha

Use this free Mahadasha Calculator to find out which Vimshottari Dasha you are running right now. Enter your date, time and place of birth and the tool shows your current Mahadasha, Antardasha and Pratyantar dasha with start dates, end dates and time left. You also get the dasha balance at birth, the full 120-year Mahadasha timeline with the 9 Antardashas of each period, and the sign and house of the current dasha lord in your chart. It works as a Vimshottari Dasha calculator and an Antardasha calculator in one.

What is a Mahadasha?

In Vedic astrology, a dasha is a period of life during which one planet is believed to have the main influence. The birth chart shows where the planets are; the dasha shows when each planet gives its results. That is why astrologers look at the dasha first when timing events.

The most widely used system is Vimshottari Dasha, described in Brihat Parashara Hora Shastra. “Vimshottari” means 120: the system takes a full life span as 120 years and divides it among the nine planets. Each planet’s main period is its Mahadasha; each Mahadasha is split into nine Antardashas (bhuktis), and each Antardasha into nine Pratyantar dashas.

Vimshottari order, years and nakshatras

Order	Dasha lord	Years	Nakshatras ruled
1	Ketu	7	Ashwini, Magha, Mula
2	Venus	20	Bharani, Purva Phalguni, Purva Ashadha
3	Sun	6	Krittika, Uttara Phalguni, Uttara Ashadha
4	Moon	10	Rohini, Hasta, Shravana
5	Mars	7	Mrigashira, Chitra, Dhanishta
6	Rahu	18	Ardra, Swati, Shatabhisha
7	Jupiter	16	Punarvasu, Vishakha, Purva Bhadrapada
8	Saturn	19	Pushya, Anuradha, Uttara Bhadrapada
9	Mercury	17	Ashlesha, Jyeshtha, Revati

After Mercury the cycle returns to Ketu. Most people do not live through all nine Mahadashas — the 120-year cycle is the basis of the calculation, not a life expectancy.

How the calculator works

1. Birth nakshatra: the tool finds the Moon’s sidereal position at birth. The lord of the Moon’s nakshatra is the lord of your first Mahadasha — for example, a Moon in Rohini means you were born in the Moon Mahadasha.
2. Dasha balance: each nakshatra spans 13°20′. The part of the nakshatra the Moon had already crossed counts as the part of the first Mahadasha already used up. If the Moon had crossed a quarter of Rohini, about 7½ of the Moon’s 10 years remain after birth.
3. Timeline: the remaining Mahadashas follow in fixed order with their full years, giving the 120-year timeline.
4. Antardasha: the first Antardasha belongs to the Mahadasha lord itself, then the others follow in order. Length = Mahadasha years × Antardasha planet’s years ÷ 120. In Venus Mahadasha, for instance, Venus–Sun lasts 20 × 6 ÷ 120 = 1 year, and Venus–Rahu 20 × 18 ÷ 120 = 3 years.
5. Pratyantar: the same proportion applied one level down.

Why birth time matters: time is optional, but the tool warns you if you leave it out. The Moon crosses a nakshatra in roughly a day, so a few hours’ difference can shift the dasha balance by several months, and near a nakshatra boundary it can even change the first Mahadasha. The dasha lord’s house also comes from the Lagna, which needs the time. Different software may use slightly different year lengths and ayanamsas, so dates can differ by a few days.

General themes of each Mahadasha

Mahadasha	Themes traditionally linked
Ketu	Detachment, spirituality, sudden change, inner search
Venus	Marriage and relationships, comforts, arts, vehicles
Sun	Confidence, status, father, government matters
Moon	Mind and emotions, mother, travel, public dealings
Mars	Courage, energy, land and property, siblings, competition
Rahu	Ambition, foreign links, technology, unexpected ups and downs
Jupiter	Learning, children, dharma, teachers and guidance
Saturn	Hard work, discipline, patience, service, slow but lasting results
Mercury	Intellect, business, communication, studies

These are only general themes. No Mahadasha is good or bad by itself — its results depend on the dasha lord’s sign (exalted, own, friendly, enemy or debilitated), its house and lordships, its conjunctions and aspects, and the transits running at the time. That is why the tool shows the lord’s sign and house but does not claim to predict outcomes. For a full reading, see your free Kundli and check your birth star with the Nakshatra calculator.

Traditional practices during a dasha

• Sun: offering water to the rising Sun.
• Moon: Shiva puja on Mondays and chanting “Om Namah Shivaya”.
• Mars and Saturn: worship of Hanuman ji and reading the Hanuman Chalisa; for Saturn, serving workers and people in need.
• Mercury and Ketu: Ganesh puja. Jupiter: worship of Vishnu. Venus: Lakshmi puja. Rahu: worship of Durga.

These are devotional traditions, not guarantees — your own effort and choices matter most.

Mahadasha: beliefs and facts

• Belief: Saturn Mahadasha always brings suffering. Fact: a well-placed Saturn can give great stability and success. Saturn Mahadasha is also different from Sade Sati, which comes from Saturn’s transit over the Moon.
• Belief: Rahu Mahadasha ruins everything. Fact: many people rise suddenly in Rahu’s period, especially in new fields or abroad; it depends on the chart.
• Belief: life changes overnight when a dasha changes. Fact: changes usually unfold gradually, shaped by the Antardasha and transits too.

Frequently asked questions