Janma/Methodology
Behind every reading

How Janma Calculates Your Chart

No guesswork, no generic horoscopes. Here's exactly what runs behind the scenes — the astronomy, the astrology system, and how AI turns your placements into a reading that's actually about you.

Swiss Ephemeris

The astronomy

Every planetary position starts with Swiss Ephemeris, the same astronomical data set used by professional astrology software and observatories. It's accurate to within an arc-second for modern dates — there's no rough approximation happening underneath your chart.

Lahiri Ayanamsa

The zodiac system

We calculate sidereal, not tropical, positions — using the Lahiri ayanamsa, the standard adopted by India's official calendar authority and the most widely used system in Vedic astrology. This is why your Vedic Moon sign often differs from your Western sun sign.

Whole-Sign Houses

The house system

Houses are assigned using the whole-sign method — the oldest and most traditional house system in Vedic astrology, where your entire ascendant sign forms the 1st house. No house-edge ambiguity, no split signs.

True Node

Rahu & Ketu

Rahu and Ketu are calculated using the true lunar node (its real, slightly wobbling position) rather than the smoothed mean node some tools default to — a more precise placement, especially when you're born close to a node change.

From chart to reading

Your reading isn't a random AI essay, and it isn't a templated paragraph swapped in based on your sun sign. We first compute a full set of concrete chart facts — your lagna lord's condition, your Moon's placement and strength, which houses are crowded, which planets are exalted or under pressure, any classical yogas present, your Rahu-Ketu axis, and your current Vimshottari dasha period.

Those facts — not raw astrology jargon, and not a blank prompt — are what we hand to the AI that writes your reading. It builds the narrative from your actual placements, so two people with different charts get genuinely different readings, grounded in what's really there rather than generic statements that could apply to anyone.

We're upfront about what this is and isn't: a reflective tool for self-understanding, not a deterministic prediction. For medical, legal, financial, or major life decisions, talk to a qualified professional.

Common questions

Why Lahiri ayanamsa and not another system?

It's the ayanamsa used by India's official calendar (the Indian Calendar Reform Committee's standard) and the most common choice in Vedic astrology practice and publications, which keeps your chart consistent with what a traditional astrologer would calculate.

Why whole-sign houses instead of Placidus or KP?

Whole-sign is the house system used in classical Vedic texts and is still the default among most Jyotish practitioners — it avoids the ambiguity of house cusps falling mid-sign under quadrant systems.

Does the AI ever make things up?

The AI is constrained to write from the deterministic chart facts we calculate for you — it isn't free to invent placements or predictions. It also avoids hard predictions, fear-based language, and any medical, legal, or financial advice.

What birth details do you need, and why?

Your birth date, exact time, and birthplace coordinates — that's all Swiss Ephemeris needs to place every planet, house, and nakshatra precisely. Without an exact time, your ascendant and house positions can't be calculated accurately.

See it calculated on your own chart.

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