Vedic Synastry: Relationship Compatibility in the Sidereal Zodiac
Vedic synastry compares two birth charts using the sidereal zodiac (the fixed star background, with the Lahiri ayanamsa) rather than the tropical zodiac used in Western astrology. Because of the ~24° ayanamsa shift, your sidereal sun sign is usually the sign before your tropical one — so a tropical Leo is usually a sidereal Cancer.
This calculator gives a first-layer Vedic synastry reading: sidereal sun signs, element harmony, the friendship of the ruling planets, polarity and quality. For the complete Vedic assessment — Guna Milan, nakshatra compatibility and dosha checks — pair this reading with a full kundali match.
Vedic vs Western Synastry
Western synastry overlays two tropical charts and reads aspects between planets. Vedic synastry works from the sidereal zodiac and traditionally centres the Moon, the nakshatras and the koota system. They answer the same question — how do these two people relate — with different tools. Many modern couples run both.
What This Reading Includes
Your sidereal sun signs are computed from your birth dates with the Lahiri ayanamsa. The reading then evaluates: element harmony (Fire–Air and Earth–Water are naturally friendly), the classical friendship of the two rasi lords, polarity (masculine/feminine energy), and quality (cardinal/fixed/mutable pacing). Each verdict contributes to an overall compatibility score.
Frequently Asked Questions
What is Vedic synastry?
Vedic synastry is the comparison of two birth charts using the sidereal zodiac and Vedic tools (rashis, nakshatras, kootas, doshas) to assess relationship compatibility.
Why is my Vedic sun sign different from my Western sign?
The Vedic (sidereal) zodiac is fixed to the stars, while the Western (tropical) zodiac is fixed to the seasons. The ~24° Lahiri ayanamsa shift usually moves your sun sign back by one sign.
Is Vedic synastry the same as kundali matching?
Kundali matching (Guna Milan/Porutham) is the marriage-focused Vedic system based on the Moon and nakshatras. Vedic synastry is the broader chart-comparison lens — this calculator is the first layer; the full match completes it.