Moon Phase Calculator
Estimate the lunar phase for your birthday, then explore its astronomy and symbolic meaning.
How Moon Phase Calculations Work
This calculator uses an average lunar cycle of about 29.53 days and a reference new moon. Results are approximate and may differ near phase boundaries. The illustration uses a Northern Hemisphere view.
What We Calculate
- • Phase Name: New, Waxing Crescent, First Quarter, etc.
- • Illumination: Approximate fraction of the Moon’s face illuminated
- • Lunar Age: Days since the last new moon
- • Keywords: Symbolic themes used in astrology
The 8 Moon Phases
- • New Moon: Near the start of the cycle
- • Waxing Crescent: Less than half lit, growing
- • First Quarter: Half lit, waxing
- • Waxing Gibbous: More than half lit, growing
- • Full Moon: Fully illuminated face
- • Waning Gibbous: More than half lit, shrinking
- • Last Quarter: Half lit, waning
- • Waning Crescent: Less than half lit, shrinking
Frequently Asked Questions
What moon phase was I born under?
Enter your complete birth date to estimate its Moon phase. This calculator uses an average cycle of about 29.53 days, so its date-only result is approximate and may differ near a phase boundary.
What does it mean to be born under a full moon?
A full moon occurs when the side facing Earth appears fully illuminated. BirthVerse also offers themes such as fulfillment for symbolic reflection; these themes are not a measurement or prediction of personality.
How does the moon phase affect your personality?
BirthVerse presents Moon-phase personality themes as symbolic interpretations used in astrology. The calculator estimates lunar illumination and cycle position; it does not measure your personality, emotions, or future.
Is there a best moon phase to be born under?
There is no best phase in this calculator. Each phase describes a different part of the lunar cycle. You can use the optional symbolic themes for reflection without treating them as a judgment about your character or prospects.