Ayanamsa Comparison Table: Lahiri vs Raman vs Krishnamurti vs Yukteshwar

Direct answer: The four major ayanamsas disagree by up to ~3°: Lahiri ≈ 24°13′ (2026), Krishnamurti ≈ 24°08′ (−5′24″), Raman ≈ 22°47′ (−1°26′38″), Yukteshwar ≈ 21°20′ (zero-year derivation; verify against a published table). Lahiri is the Indian government's Calendar Reform Committee standard and the mainstream default worldwide. Ayanamsa choice shifts every planet in your chart — it's the #1 reason two calculators disagree.

The ayanamsa is the angular distance between the tropical and sidereal zodiacs — the number subtracted from Western longitudes to get Vedic positions. There is no single "correct" value: different authorities fixed the zero point (the year the two zodiacs coincided) at different dates, and everything follows from that choice. This page gives you the data table, the derivation, and the practical consequences.

The comparison table (values for 2026-01-01)

Values are approximate (rounded to the arc-minute) for 2026-01-01, cross-checked against live calculator tables (e.g. AstroSage's ayanamsa page, Oct 2026). The offsets are NOT exact consequences of zero years at a single rate: Lahiri follows the Indian Astronomical Ephemeris 1989 formulation (as implemented in the Swiss Ephemeris), while Raman uses Raman's own constant 50.3333″/year. Yukteshwar values vary between published tables — verify against a published table before relying on it. Any calculator should compute the date-specific value, not use a constant.

How the numbers are derived

The ayanamsa grows as the equinox precesses westward along the ecliptic at roughly 50.29 arcseconds per year (Newcomb's rate, used in the classical formulations):

A first approximation: Ayanamsa ≈ (Year − Zero Year) × 50.29″. But the real systems don't all share one rate — Lahiri follows the Indian Astronomical Ephemeris 1989 formulation (as implemented in the Swiss Ephemeris), while Raman uses Raman's own constant of 50.3333″/year. So the naive zero-year derivation gives the wrong offsets. The published 2026 values above are the reliable numbers — not the back-of-the-envelope math:

• Lahiri: published tables converge near 24°13′ for early 2026 (Spica/Chitra anchored at 180°).
• KP sits a nearly constant 5′24″ behind Lahiri (~6′ in most citations).
• Raman: zero year 397 AD at Raman's own 50.3333″/yr → 1629 × 50.3333″ ≈ 81,993″ ≈ 22°46′33″, i.e. ≈ 22°47′ — checkable on any live ayanamsa calculator. The true 2026 Lahiri↔Raman gap is 1°26′38″, not the naive 112 × 50.29″ = 1°33.9′.
• Yukteshwar's value varies between published tables (~21°14′–21°20′ for 2026); treat any figure as provisional until checked against a published source.

The Swiss Ephemeris implements all of these (plus ~30 more ayanamsas) as selectable options — which is precisely why "which ayanamsa?" is a settings question with a dropdown, not a mystery.

Why Lahiri is the default

In 1955, the Government of India formed the Calendar Reform Committee under astronomer Nirmala Chandra Lahiri to unify the country's calendrical calculations — so festivals would fall on the same day nationwide. Lahiri anchored the sidereal zodiac to the star Spica (Chitra) at exactly 180° (0° Libra) and derived the precession formula from there. The result — the Chitrapaksha ayanamsa — became the official standard and, by adoption, the mainstream default of Indian astrology and nearly all Indian astrology software.

Arguments for Lahiri beyond officialdom: it has been tested against divisional charts (vargas) more extensively than any alternative, and KP's value sits only ~6′ away — effectively the same system with a refinement, which is why KP and Lahiri users rarely disagree meaningfully.

The practical impact: when ayanamsa changes your chart

Ayanamsa differences only matter near boundaries:

Concrete example: a lagna at 28° Sagittarius (Lahiri) becomes ~26.5° Sagittarius under Raman (the 1°26′38″ gap rounds to ~1.44°) — same sign, but a Moon at 0.5° Capricorn (Lahiri) becomes ~29° Sagittarius under Raman: different sign, different nakshatra, potentially different dasha sequence. This is why "which ayanamsa does the site use?" is the first question when two calculators disagree. (Why charts differ)

Which should you use?

• Default to Lahiri unless you have a specific reason not to: it's the official standard, the software default, and what most Indian astrologers expect. If you take a Lahiri chart to an astrologer, you're speaking the same language.
• Use KP ayanamsa only with KP techniques. Krishnamurti's system (sub-lords, ruling planets) was calibrated to its own ayanamsa; mixing KP ayanamsa with Parashari interpretation (or vice versa) combines two systems' assumptions incoherently.
• Raman has a genuine traditional following (B.V. Raman was a towering figure), particularly in parts of South India. It's a legitimate school choice, not an error — but it must be stated, because unstated Raman is indistinguishable from a bug.
• Yukteshwar remains a minority proposal. Interesting historically; rarely used in practice.

The meta-rule: the ayanamsa must be stated. A calculator that doesn't tell you which one it uses has denied you the single most important setting in the chart. kundli.site states Lahiri publicly in its methodology.

Frequently asked questions

What is ayanamsa in simple terms?

The gap between the tropical zodiac (Western, season-based) and the sidereal zodiac (Vedic, star-based), caused by precession of the equinoxes. Vedic longitude = tropical longitude − ayanamsa. Currently about 24°.

Which ayanamsa is correct: Lahiri or Raman?

There is no experimentally provable "correct" — they're different conventions for where the sidereal zero point sits. Lahiri is the official Indian standard and mainstream default; Raman is a respected minority school. What matters is knowing which one your chart uses.

What is the Lahiri ayanamsa value in 2026?

Approximately 24°12′ at the start of 2026, increasing about 50.3″ per year. Always use the date-specific value, not a memorized constant.

How much do Lahiri and KP ayanamsa differ?

Only about 6 arc-minutes — their zero years (285 AD vs 291 AD) are 6 years apart. For nearly all practical purposes they give the same chart.

Why does my chart change between websites?

Almost always the ayanamsa setting (Lahiri vs Raman is the classic 1.5° surprise), the house system, or timezone handling. Check the site's stated ayanamsa first.

Does ayanamsa affect dashas?

Yes — Vimshottari dasha is computed from the Moon's nakshatra, which is a sidereal position. Near nakshatra boundaries, a different ayanamsa can change the birth dasha lord and the entire sequence timing.

What ayanamsa does kundli.site use?

Lahiri (Chitrapaksha), computed date-specifically. Stated in the public methodology.

Can I convert a Western chart to Vedic myself?

Approximately: subtract ~24°12′ (2026 Lahiri) from each tropical longitude; if the result goes negative, add 360°. For the ascendant and houses, proper sidereal-time computation is needed — use a real calculator rather than hand-converting.