💫 Synastry Compatibility Calculator
Synastry is the astrological technique of comparing two full charts, point by point. This calculator goes deeper than a Sun-sign-only match by comparing Sun, Moon (if both birth times are entered), and Rising signs (if both full birth details are entered) using real astrological aspects — the same angle-based system professional astrologers use, applied at the sign level.
⚠️ Scope note: This compares Sun, Moon, and Rising signs — the three most impactful chart points for a first-pass synastry read. A full professional synastry chart also maps Venus, Mars, and outer planets, which need precise ephemeris data beyond what a browser calculator can responsibly provide. Moon signs here use a simplified approximation; Rising signs require exact birth time and coordinates for accuracy.