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Vedic Birth Chart Calculator
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Lahiri ayanamsa · Swiss-grade ephemeris · Whole-sign houses · Classical Parashari
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What is a Vedic birth chart?
A Vedic birth chart — called Janma Kundli — is a map of the sky at the exact moment and place of your birth, drawn in the sidereal zodiac (anchored to the actual star positions, not the seasons). It shows where every planet was sitting across the twelve zodiac signs, which signs were rising and setting, and how the sky was divided into twelve houses of life experience.
Unlike Western horoscopes — which are mostly sun-sign based — Vedic astrology reads the full chart. Your ascendant (Lagna), your moon sign (Rashi), your nakshatra, and your current dasha period are all equally important to a proper Vedic reading.
What the South Indian chart shows
The South Indian chart uses a fixed 4×4 grid where the twelve zodiac signs always occupy the same positions — Aries is always in the second cell of the top row, moving clockwise through all twelve. Unlike the North Indian style (where houses are fixed and signs rotate), the South Indian format is sign-first: you read it by finding which sign is marked as Lagna (Ascendant) and counting houses from there.
The ◈ marker shows your ascendant sign. The abbreviations in each cell show which planets are placed in that sign. Lg = Lagna (ascendant point), Su = Sun, Mo = Moon, Ma = Mars, Me = Mercury, Ju = Jupiter, Ve = Venus, Sa = Saturn, Ra = Rahu, Ke = Ketu.
Why birth time matters
The ascendant changes sign roughly every two hours, and the Moon moves about 13° per day. Even a 10-minute error in birth time can shift the ascendant degree — and a 2-hour error can put you in a different ascendant sign entirely, which changes the house placements of every planet. The dasha calculation also depends on the Moon's exact degree.
If you only know an approximate birth time, the Moon sign, nakshatra, and most planetary sign placements are still reliable. The ascendant and house cusps become approximate. Diya will tell you which parts of the reading remain solid and which depend on birth-time precision.
The nine planets in Vedic astrology
Vedic astrology uses nine grahas (planets): Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn, Rahu, and Ketu. Rahu and Ketu are the lunar nodes — the points where the Moon's orbit crosses the ecliptic. They are not physical bodies, but in classical Jyotish they are treated as full-weight planets with their own signs, nakshatras, dashas, and transits.
Rahu and Ketu are always exactly opposite each other (180° apart), which is why they often appear in opposite houses in the chart. They are the karmic axis of the chart — Ketu showing what the soul has already mastered, Rahu showing what the soul came in this lifetime to develop. For more on this, see finding your life purpose through your Vedic chart.
Frequently Asked Questions
What is the difference between Vedic and Western zodiac charts?
The main difference is the zodiac itself. Western astrology uses the tropical zodiac, anchored to the spring equinox. Vedic uses the sidereal zodiac, anchored to the actual star positions. They are currently about 24° apart — so your Vedic sun sign is often one sign earlier than your Western sun sign. The interpretive traditions also differ substantially: Vedic centres on the moon, the ascendant, and dasha timing; Western centres on the sun sign and aspect patterns.
What is Lahiri ayanamsa?
Ayanamsa is the offset between the tropical and sidereal zodiacs. Lahiri (also called Chitrapaksha) is the standard ayanamsa used in Vedic Parashari astrology and is the official government of India standard. It is currently about 24°. All calculations on this calculator use Lahiri ayanamsa.
What are whole-sign houses?
In whole-sign houses, each house corresponds to an entire zodiac sign. Your ascendant sign becomes the first house entirely — the full 30° of that sign. The second house is the entire next sign, and so on. This is the traditional Vedic house system and is what Parashari astrology uses. It differs from the Placidus and Koch systems common in Western astrology.
What is Vimshottari dasha?
Vimshottari dasha is the primary timing system in Vedic astrology. It divides your life into planetary periods (mahadashas) totalling 120 years, determined by which nakshatra your moon was in at birth. Each period activates that planet's themes across your chart. The current mahadasha and antardasha shown here are what Diya uses for timing-based questions.
Why are Rahu and Ketu always in opposite signs?
Rahu and Ketu are the north and south lunar nodes — mathematical points, not physical bodies. They are always exactly 180° apart on the ecliptic, so they always fall in opposite signs and opposite houses. This is why they are always read as an axis rather than individually.
How accurate is this calculator?
The planetary longitudes are computed using mean orbital elements (Meeus algorithms), which gives accuracy within 1–2° for most planets — sufficient for sign and house placement. The ascendant is sensitive to birth time: a 4-minute error can shift the ascendant by about 1°. For the highest precision (e.g. exact nakshatra pada boundaries), a Swiss Ephemeris backend is more accurate — which is what Diya uses for full readings.
Want a reading, not just a chart?
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