Free Self-Discovery Tool
Free moon phase soulmate calculator. Compare your birth moon phase with someone else’s and get your match — no signup required.
It calculates the Moon’s phase at each person’s birth (the angle between the Sun and Moon in the chart), then measures how the two phases overlay. Complementary phases that fill in toward a full moon score highest — the classic “you complete each other” signature.
Your natal moon phase is a real astrological placement tied to your emotional rhythm. The two-person “soulmate” overlay is a fun, popular interpretation rather than traditional synastry — best enjoyed as a meaningful conversation starter.
Birth time improves precision, especially near a phase boundary, but a birth date is usually enough to find each person’s moon phase.