Moon Phase Calculator
Find the exact moon phase for any date, your birthday, theirs, or today, computed from the real angle between the Moon and the Sun.
The moon phase soulmate calculator compares both phases and tells you if they complete each other. Or go deeper with the full reading.
Start my free readingThe eight phases and what they mean for you
The Moon's phase is set by its angle to the Sun: 0\u00b0 is a New Moon, 180\u00b0 a Full Moon, with crescents, quarters, and gibbous phases between. In birth chart terms, your natal phase describes your instinctive rhythm: New Moon people start things, Full Moon people are built for visibility and relationships, waning-phase people process and release.
The viral soulmate test
The TikTok version pairs two birth moons to see if the images combine into one full circle. We built a dedicated calculator for that, and an article on what the test actually says. For emotional compatibility, your moon sign matters more than your phase.