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Free synastry calculator.
Save both people's birth details, then compare the charts.
Reviewed by Dr. L. Nageshwwar Rao, PhD (Astrology), Consulting Astrologer · Last reviewed 5 August 2026 · How we compute this
Free synastry calculator. Compare the planet positions in two birth charts. See their angles and halfway points, without a compatibility score.
Add the first person's birth date, time and place.
Add the second person's birth date, time and place.
Get the angles between the two charts' planets.
See closest contacts, the full table and halfway points.
Synastry compares planet contacts across two birth charts. This tool lists the angles and gaps between each person's planets. It gives no compatibility score or relationship verdict.
Each row pairs a planet in Person A with one in Person B. It shows contact type, angle, gap and motion. Both sides use ten bodies, Sun through Pluto, without the Moon's nodes.
It is the halfway point between each planet's positions in the two charts. Each point has a sign and exact position. Life areas and key chart points are omitted because methods disagree.
Closing means the gap from the exact contact angle is shrinking. Widening means it has passed that angle. In synastry, these labels use speeds at birth and add no relationship verdict.
No. It shows planet contacts, not a compatibility score, percentage or relationship prediction. A full reading explains how the two charts fit.
Gun Milan uses eight match factors for a Vedic score out of 36. This tool uses Western signs and shows contacts without a score. Use the Kundli Milan calculator for the Vedic match score.
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