Calculate your moon phase at birth
The Moon moves through eight phases on its journey from new to full and back, and the phase you were born under colours your inner rhythm and emotional nature. It’s set by the angle between the Sun and Moon at your birth. Birth Codex calculates it precisely, alongside 22 more cosmic systems.
Calculated with Swiss Ephemeris — astronomically precise data
23 cosmic systems · No sign-up
The moon phases
Frequently asked questions
How do I find the moon phase I was born under?✦
Your birth moon phase comes from the angle between the Sun and Moon at your birth. Birth Codex calculates it precisely from your birth date and time.
What does my birth moon phase mean?✦
Your birth moon phase describes your inner rhythm and emotional nature — where you sit in the cycle from new to full and back. Each phase carries its own archetype.
Is the birth moon phase the same as my moon sign?✦
No — your moon sign is the zodiac sign the Moon was in; your moon phase is its relationship to the Sun. Birth Codex reads both, plus 21 more cosmic systems.