Ayanamsa Calculator
Frequently asked questions about Ayanamsa
What is ayanamsa?
It is the angular gap between the tropical zodiac (tied to the spring equinox) and the sidereal zodiac (tied to the stars). Vedic charts subtract that offset from tropical longitudes so planets sit in the signs Indian Panchangs use. Around 2026 the Lahiri figure is just over 24 degrees.
Does a different ayanamsa mean my chart is wrong?
No. Lahiri, Raman and KP are three official zero points, not three competing truths. Raman sits about a degree and a half behind Lahiri, so a planet near a sign boundary can change sign. KP is typically a few arcminutes smaller than Lahiri. Pick the system your astrologer uses, and stay with it. This site's Kundlis stay on Lahiri.
Do I need my birth time or city?
No. Ayanamsa moves about 50.3 arcseconds a year, which is a small fraction of one second of arc in a day. This page uses 12:00 Universal Time. A rough date is enough unless you are comparing two systems at the second of arc, which almost nobody needs for a natal chart.
How is this different from Kundli Maker?
Kundli Maker draws the full sidereal chart - houses, dashas, Panchang - always on Lahiri. This page only answers what the offset is on a given date, and lets you compare Lahiri with Raman and KP. It is not a birth chart. The Moon sign from that Lahiri chart is Janma Rashi.
Why does this site stay on Lahiri?
Lahiri (Chitrapaksha) is the ayanamsa of the Indian national calendar and of most printed Panchangs. Using it here keeps Kundlis, Rashifal and festival dates on the same frame. Method notes for the Swiss Ephemeris and that choice are on How we Calculate.
How often should I recheck the value?
For a natal chart, once. The figure for your birth date does not change. For a transit or a Panchang, the current year's value is enough; it creeps by about 50 arcseconds a year. This calculator covers 1800 to 2100 from Swiss Ephemeris 2.10.
About Ayanamsa
Ayanamsa is the angular gap between the tropical zodiac (tied to the spring equinox) and the sidereal zodiac (tied to the stars). Vedic charts subtract that offset from tropical longitudes so planets sit in the signs Indian Panchangs use. The figure grows by about 50.3 arcseconds a year; around 2026 it is just over 24 degrees for Lahiri.
This page reports the Swiss Ephemeris value for three common systems: Lahiri (Chitrapaksha), the official Indian calendar ayanamsa and the one used on every Kundli here; Raman, about a degree and a half smaller; and KP (Krishnamurti), close to Lahiri and used in Krishnamurti Paddhati. A different number is not a "wrong" chart - it is a different zero point. Switching system here does not change Kundli Maker.
Enter a date only. Time of day does not move the displayed seconds. The Vedic Moon sign from Lahiri is Janma Rashi. Method notes for the ephemeris live on How we Calculate.
Have a question about the ayanamsa (Lahiri, Raman or KP)? Our astrologers answer real reader questions.
