Birth Moon Calculator
What moon phase was in the sky when you were born? Enter your birth date and discover your birth moon — free, in seconds.
What is the birth moon?
The birth moon is the exact moon phase that was in the sky on the day you were born — from new moon through the waxing crescent to the full moon. Everyone has their own unique birth moon, defined by the precise date.
Many people see their birth moon as a personal symbol. As a personalized poster it becomes a unique gift — for a birth, a birthday, or as a memento of a special day.
How the birth moon calculator works
- 1Enter your birth date (or that of a loved one).
- 2The calculator instantly shows the moon phase, illumination and moon sign.
- 3Optionally turn your birth moon into a personalized poster.
Frequently asked questions
How is the birth moon calculated?+
The calculator uses precise astronomical formulas (SunCalc) to determine the moon phase for any date between 1900 and 2100 — exactly as it appeared in the sky.
Is the birth moon calculator free?+
Yes, the calculation is completely free and requires no sign-up. Only the optional personalized poster costs from €4.99.
What is the moon sign?+
The moon sign indicates which zodiac sign the moon was in at the time of your birth — a popular complement to the sun sign in astrology.
Can I gift the birth moon?+
Yes — a personalized birth moon poster with date, location and name is a unique gift for a birth, birthday or anniversary.
Your birth moon as a poster
Turn your birth moon into a personalized work of art — with your date, location and name. Print-ready at 300 DPI, instant download.
Create moon poster