Ayanamsa
Glossary · Last updated: 2026-07-26
Ayanamsa (from Sanskrit ayana + amsha) is the difference between the tropical and sidereal zodiac origins, expressed in degrees.
Pick a different ayanamsa and your sidereal Moon or Lagna can land in an adjacent sign near boundaries. Lahiri is our default.
Schools differ slightly
Raman, Krishnamurti, and other ayanamsas exist. For educational apps, consistency matters more than debating which tradition is authoritative.
Related
Main reading and tools
These are the main reading and calculator pages. Use them for a daily note, a birth-sign tool, or a pair check.
- Today's Horoscope hubAll twelve Western sun-sign daily pages, plus links into the seven-tradition reader.
- Horoscope & Zodiac CompatibilityTwo birth dates for Western, Chinese, and Vedic folk pairing, plus every sun-sign hub.
- Zodiac Sign CalculatorWestern sun sign from birth date, with element, modality, and ruler.
- Vedic Rising Sign CalculatorLagna estimate when you have birth date, time, and place.
- Vedic Moon Sign CalculatorJanma Rashi and nakshatra when birth time and city are available.