Astrool
Glossary
Ayanamsa
The angle between the season-based and star-based zodiacs, currently about 24°, and the number that converts a Western chart into a Vedic one.
Definition
Ayanamsa (Sanskrit ayanāṃśa, "portion of movement") is the arc between the March equinox point and the start of sidereal Aries. It grows by about 50 arc-seconds a year because of precession.
Common ayanamsas
| Ayanamsa | Used by |
|---|---|
| Lahiri (Chitrapaksha) | Indian government calendar; the default in most Jyotish |
| Raman | Followers of B. V. Raman |
| Krishnamurti (KP) | Krishnamurti Paddhati system |
| Fagan-Bradley | Western sidereal astrology |
They differ by about a degree at most, enough to move a placement near a sign boundary. Astrool uses Lahiri by default; the others are in settings.
See it in your own chart
Astrool calculates your full birth chart, not just your sun sign, and writes your daily, weekly and monthly readings against it.
Common questions
What is today's Lahiri ayanamsa?
Roughly 24 degrees 12 minutes in 2026, increasing slowly each year.
Which ayanamsa should I use?
Lahiri unless your astrologer or tradition specifies another.