North vs South Indian Chart Formats
Convert between North and South Indian chart layouts without changing the calculated chart. Identify fixed houses, fixed signs and the ascendant marker.
Overview
The common North Indian layout fixes the house positions, while the common South Indian layout fixes the sign positions. They can display the same D1 data. Moving a symbol to a different box is not a new astronomical calculation.
At a glance
- North Indian layout
- Fixed house locations
- South Indian layout
- Fixed sign locations
- Essential marker
- Ascendant / Lagna
- Transfer unchanged
- Factor, sign and longitude
What do the numbers inside the boxes mean?
In a conventional North Indian D1, the first-house area is fixed and the number inside it can identify the ascendant sign: 5 means Leo, not “this is house five.” Check the chart’s legend because software styles can vary.
In a South Indian chart, the signs stay in their designated boxes; the ascendant marker shows which sign begins house counting. Do not start house one at the upper-left box merely because it is the first place your eyes go.
Transfer a small chart between the layouts
For an invented example, set lagna to Leo and Mercury to Virgo. In the North Indian format, the first-house area carries sign number 5 and the second-house area carries 6 with Mercury. In the South Indian format, lagna goes in Leo’s fixed box and Mercury in Virgo’s fixed box.
Both describe Mercury in Virgo, second from Leo under whole-sign counting. Preserve its degree as well if supplied. If conversion changes Mercury’s sign, the transcription—not the astrology—needs correction.
A display format does not settle a method disagreement
Before comparing screenshots, check that both are D1 rather than one D1 and one D9 or bhava-chalit display. Also align zodiac and house convention. A matching drawing style cannot reconcile different underlying inputs.
Rao’s §1.3.4 presents these chart-layout conventions. Its example illustrates notation; the diagram format does not prove historical birth data or predictive outcomes. Use a position table when a screenshot’s legend is incomplete.
Sources and editorial basis
- P. V. R. Narasimha Rao: Vedic Astrology — An Integrated ApproachRao §1.3.4, printed pp. 8–10: fixed-house North Indian and fixed-sign South Indian layouts. Original Leo/Mercury teaching example; no historical chart is certified.A named practitioner’s introduction to Jyotish. Used for terminology and a stated method, not universal school agreement or scientific validation. The added March 18, 2010 note describes changed views; it does not establish a fully revised 2010 edition.
- OpenFate Editorial MethodologyOpenFate Editorial Methodology, stable sections #editorial-principles, #editorial-workflow, #editorial-ai, and #editorial-context. Used for the calculation/interpretation and evidence-boundary policy.OpenFate separates deterministic chart calculation, traditional interpretation, and modern editorial explanation.
- Swiss Ephemeris Programmer’s Manual: Time, Sidereal Modes and HousesSwiss Ephemeris Programmer’s Manual §§15.2/15.4: angle calculation and house methods W (whole-sign) versus A/E (equal). The layout example is supported by Rao §1.3.4.Primary software documentation for numerical time and position calculations. Sidereal modes, including named Lahiri variants, are explicit settings. The manual does not validate astrological interpretations.
- IANA Time Zone DatabaseIANA tz database theory.html, “Scope of the tz database” and “Accuracy of the tz database”; historical limitations, especially before 1970. This source does not verify an individual birth record.The maintained source for current and historical civil-time offsets and daylight-saving transitions; it provides timekeeping facts, not astrological interpretation.