Why does this only need my Moon's Nakshatra, not my full birth chart?

Vimshottari Dasha's timing is specifically anchored to the Moon's position at birth — this is a real, classical feature of the system, not a simplification this tool is taking. A full birth chart (with Ascendant and all planetary positions) is used for other astrological purposes, like a Kundali reading, not for computing the Dasha timeline itself.

Why does birth time matter so much?

The Moon moves roughly 13° per day, or about 1° every 2 hours — since your starting Dasha balance depends on exactly where within its Nakshatra the Moon sits, even an hour's uncertainty in birth time can shift the calculated balance by a week or more.

What is a Mahadasha versus an Antardasha?

A Mahadasha is one of the 9 major planetary periods, lasting years; each Mahadasha further divides into 9 Antardashas (sub-periods) in the same 9-lord order, each proportionally shorter.

Why does my first Mahadasha last less than its full listed years?

Because you were already born partway through that lord's Nakshatra span — only the remaining "balance" of that period is counted from your birth date, exactly as the classical formula prescribes.

Does this account for Pratyantardasha (third-level sub-periods)?

No — this tool computes Mahadasha and Antardasha (2 levels) only. Pratyantardasha and deeper sub-divisions exist in the full classical system but aren't computed here.

Is Rahu a real planet?

Rahu and Ketu are the Moon's north and south lunar nodes — mathematical points where the Moon's orbit crosses the ecliptic, not physical bodies, but they're treated as full "planets" (Chhaya Graha, shadow planets) with real Dasha periods in Vedic astrology.

Can two people born on the same day have different Dasha timelines?

Yes — since the Moon moves continuously, two births even a few hours apart, or in different locations (affecting the local birth time conversion), can land in different Nakshatras or different points within the same Nakshatra, giving different Dasha balances.

Is a longer or shorter Dasha period better?

Classical Vedic astrology doesn't rank Dasha lengths as inherently better or worse — each planetary period is traditionally associated with its own themes and is interpreted in the context of that planet's placement in a person's full birth chart, which this tool doesn't compute.

Why is the total cycle length exactly 120 years?

It's a fixed classical constant — the sum of all 9 lords' individual years (7+20+6+10+7+18+16+19+17) totals exactly 120, a defining feature of the Vimshottari system named for it ("vimshottari" roughly translates to "120" in this context).

Vimshottari Dasha Calculator

About the Vimshottari Dasha Calculator

Computes your Vimshottari Dasha — the classical 120-year planetary period timeline used in Vedic astrology — from your birth date, time, and location.

100% Free Runs in Your Browser No Sign-Up Required

How to use it

Enter your birth location (used to convert your local birth time to the correct instant).
Enter your birth date and, as precisely as possible, your birth time.
Read the currently running Mahadasha and Antardasha at the top.
Tap any Mahadasha row in the timeline below to expand its own 9 Antardasha sub-periods.

Formula

Vimshottari Dasha assigns a fixed 120-year cycle across 9 planetary lords (Ketu 7, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19, Mercury 17 years) in a fixed repeating order. Which lord's period is running at birth, and how much of it remains (the "balance"), depends only on the Moon's Nakshatra (lunar mansion) at birth — specifically, which of the 27 Nakshatras and how far through its 13°20' span the Moon has traveled. Each Mahadasha further subdivides into 9 Antardashas in the same 9-lord order, each proportional to (Mahadasha lord's years × Antardasha lord's years) ÷ 120.

Worked example

A Moon at exactly 5° into Rohini Nakshatra (Moon's own 10-year Dasha) has a balance of (13°20′ − 5°) ÷ 13°20′ × 10 = 6.25 years of Moon Dasha remaining from birth — matching the standard textbook balance formula exactly.

The 9 Vimshottari Dasha lords, in cycle order

The 9 Vimshottari Dasha lords, in cycle order
Lord	Years	Governing Nakshatras (of 27, repeating this 9-lord cycle 3x)
Ketu	7	Ashwini, Magha, Mula
Venus	20	Bharani, Purva Phalguni, Purva Ashadha
Sun	6	Krittika, Uttara Phalguni, Uttara Ashadha
Moon	10	Rohini, Hasta, Shravana
Mars	7	Mrigashira, Chitra, Dhanishta
Rahu	18	Ardra, Swati, Shatabhisha
Jupiter	16	Punarvasu, Vishakha, Purva Bhadrapada
Saturn	19	Pushya, Anuradha, Uttara Bhadrapada
Mercury	17	Ashlesha, Jyeshtha, Revati

Interpreting your result

Computed from real sidereal Moon positions (Lahiri ayanamsa), the same astronomical foundation as this site's Panchang and Tithi calculators. Because the Moon moves roughly 13° per day, birth time accuracy genuinely matters — even an hour's uncertainty can shift the starting Dasha balance by weeks. This is a traditional astrological framework, not a scientific prediction system.

Recommendations

• If you don't know your exact birth time, ask your family or check a birth certificate — even a 30-minute uncertainty can shift the Dasha balance by a week or more, since the Moon moves continuously through each Nakshatra.
• The currently-running Mahadasha and Antardasha are highlighted automatically based on today's date — no need to search the timeline yourself.

Frequently asked questions

A traditional Vedic astrology system dividing a 120-year life cycle into periods (Dashas) ruled by 9 planets in a fixed order, used to time when different planetary influences are considered active in a person's life.

Related tools

Daily Panchang Calculator

Tithi Calculator

Hindu Calendar Converter

Kali Yuga Calculator

Rahu Kaal Calculator

Sunrise & Sunset Calculator

Kundali Birth Chart Calculator

Hindu Baby Names Generator

Lucky Number & Colour Calculator

Navamsa (D9) Chart Calculator