Natal Moon Phase Calculator
Find the exact phase of the Moon at your birth, including the Sun–Moon angle, illumination, waxing or waning direction, lunar age, and both zodiac positions.
What Moon phase were you born under?
Your birth date is enough for a strong estimate. Time and place make the phase angle and zodiac positions more precise.
Birth data
Choose a city from the suggestions for coordinates.
If the birth time is unknown, Regu calculates at local noon and labels the result as an estimate—especially important near a phase boundary.
Why natal Moon phase differs from Moon sign
The Moon sign uses the Moon’s zodiac position. Natal phase measures the relationship between the Sun and Moon, so two people with the same Moon sign can be born in different phases.
Eight phases, one continuous cycle
The eight familiar phase names divide a continuous 360-degree cycle into readable sections. The exact angle and lunar age show where you sit inside that section.
Natal Moon phase questions
How is natal Moon phase calculated?
It is calculated from the angular distance between the natal Sun and Moon. That 0–360 degree angle identifies the phase, illumination, and waxing or waning direction.
Do I need my exact birth time?
Not always. A date-based noon estimate is often enough to identify the broad phase, but exact time improves the angle and matters near phase or zodiac-sign boundaries.
Is natal Moon phase the same as Moon sign?
No. Moon sign is the Moon’s zodiac sign; Moon phase is the Sun–Moon relationship within the lunar cycle.