Natal Moon position
Moon sign calculator
The Moon moves through the zodiac faster than the other major chart bodies, so accurate date, time and timezone information can matter near a sign change.
Find your Moon sign
Calculate the tropical Moon sign and degree from your birth data.
Calculator input: Birth time improves accuracy on days when the Moon changes signs.
Result preview: The result shows the tropical Moon sign, degree and house when the birth time is known.
This interactive calculator runs in the browser after the page loads. Inputs are calculated for the request and are not saved by the public preview.
How the Moon sign is calculated
The chart engine converts the birth moment to a standard astronomical time, calculates the Moon's ecliptic longitude and maps that longitude to the zodiac.
Moon sign versus Moon house
The sign describes the zodiac position of the Moon. The house depends on birth time and location and places the Moon within a specific chart area.
Check the exact degree
When the Moon is close to a sign boundary, the exact degree and birth time are more informative than a date-only Moon-sign table.
Frequently asked questions
Can the Moon change signs during one day?
Yes. The Moon moves quickly enough that a date-only lookup can be wrong on a day when it changes signs.
Is Moon sign the same as zodiac sign?
The commonly quoted zodiac sign is usually the Sun sign. The Moon sign is calculated from the Moon's position.
Does birthplace affect the Moon sign?
The location helps resolve the correct timezone and birth moment. The Moon's zodiac longitude itself is calculated for that moment.