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Guru Chandal Dosha Calculator | Jupiter-Rahu Conjunction

The Guru Chandal Dosha Calculator computes Jupiter's and Rahu's longitudes from birth details and reports their conjunction: separation in degrees, the house and rashi where the yoga forms, and whether Ketu rather than Rahu is involved (some texts include Guru-Ketu as a softer variant). Remedial context — strengthening Jupiter — comes with the result.

Last updated: September 2026 · Free · No sign-up required

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Results

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Quick reference

Conjunction orbs: <8° close, 8–15° loose. Jupiter exalted in Cancer, own signs Sagittarius/Pisces; debilitated in Capricorn.

public Location matters

Tithi and nakshatra boundaries depend on where you are — enter your city's coordinates for precise results.

schedule Ayanamsa

Calculations use the Lahiri (Chitrapaksha) ayanamsa, the standard for Vedic charts.

menu_book Panchang basis

Results follow drik-panchang style astronomical computation, not printed-table approximation.

school Traditions differ

Some regions use Surya Siddhanta conventions; where traditions conflict, your family panchang wins.

lightbulb A real example — Jupiter 118°, Rahu 122°

Birth chart with Jupiter at 28° Cancer, Rahu at 2° Cancer.

Result: Orb = 4° — a close conjunction in Cancer (exalted Jupiter), 9th house for a Libra ascendant: unconventional but strong dharma.

What this means: Orb under 8° is 'close'; exaltation or own-sign Jupiter materially softens the reading — the calculator reports both.

Formula & methodology

Formula: Tithi = ⌊(Moon−Sun elongation) ÷ 12°⌋; Nakshatra = ⌊Moon longitude ÷ 13°20'⌋; Vimshottari lord sequence Ketu→Venus→Sun→Moon→Mars→Rahu→Jupiter→Saturn→Mercury

How the Vedic calculation works

All Hindu calculators on CalcaTools share one astronomical runtime: Julian-day conversion, mean planetary longitudes, Lahiri ayanamsa, then derivation of tithi (Moon−Sun elongation ÷ 12°), nakshatra (Moon longitude ÷ 13°20'), rashi (Moon sign), and the Vimshottari dasha sequence (Ketu 7, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19, Mercury 17 years) anchored at the birth nakshatra's lord.

Festival dates use tabulated panchang data; muhurat windows use sunrise/sunset plus planetary day-lord hours. Default location is Delhi (28.61°N, 77.21°E, IST) unless you enter coordinates — a birth 500 km west shifts nakshatra boundaries in edge cases, so exact coordinates matter for precision work.

Frequently asked questions

What is Guru Chandal Dosha?
The conjunction of Jupiter (Guru) with Rahu (the 'chandal' outcast) in one house — traditionally read as wisdom obscured by ambition or unconventional ethics, with effects varying sharply by house.
Does Guru Chandal yoga always give bad results?
No. Strong Jupiter (exaltation, own sign, benefic aspects) can flip the yoga into unconventional brilliance; texts describe successful teachers, strategists and reformers with this placement.
Which house is worst for Guru Chandal?
Texts flag the 7th (marriage) and 10th (career) as sensitive; the 5th and 9th — Jupiter's own domains — are also watched closely.
What are the remedies?
Classical remedies centre on strengthening Jupiter: Thursday observances, guru-seva, yellow sapphire only after chart review, and Jupiter mantras on Thursdays.

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