Moon Sign Calculator

Free Moon Sign Calculator

Use this free Moon sign calculator to find your Moon sign from your exact date, time, and time zone of birth.

Unlike your sun sign, which only depends on your birth date, your Moon sign depends on the exact time of day you were born, since the Moon moves through the zodiac roughly once a month.

How to Use the Moon Sign Calculator

• Select your date of birth.
• Enter your time of birth and time zone.
• Click Calculate Moon Sign.
• View your Moon sign instantly.

Features

• Calculates your Moon sign from an astronomical approximation of the Moon's position.
• Accounts for your exact birth time and time zone.
• Works on mobile, tablet, and desktop.
• Includes print, share, copy, and download options.

Why Birth Time Matters So Much

The Moon travels all the way around the zodiac in about 27.3 days, so it spends only around two and a half days in each sign. On roughly one day in three, the Moon changes sign at some point during that day. If you were born on one of those days, your Moon sign depends on whether you were born before or after the change.

Why Time Zone Matters Too

The Moon's position is the same for everyone at a given moment, but clocks differ around the world. 08:00 in London and 08:00 in New York are five hours apart (usually), which can be enough to move the Moon into the next sign. That's why the calculator asks for your time zone as well as your birth time.

How Accurate Is the Result?

The calculator uses a standard astronomical approximation of the Moon's position that is accurate to within roughly an hour of Moon movement. If your birth time is far from a sign change, the result is reliable. If you were born within an hour or two of a change, or you only know your birth time roughly, a full ephemeris-based birth chart will give a more certain answer.

Astrology is a cultural tradition, and this calculator is intended for fun and general interest.

Frequently Asked Questions

What is a Moon sign?

Your Moon sign is the zodiac sign the Moon was passing through at the exact moment you were born. It's said to reflect your inner emotional life, separate from your sun sign.

Why does my Moon sign need a birth time?

The Moon moves through the entire zodiac in about 27.3 days, spending only 2 to 3 days in each sign. Without a birth time, it's often impossible to know which sign the Moon was in that day.

How accurate is this calculator?

It uses a well-established astronomical approximation of the Moon's position, accurate to within roughly an hour. If your birth time is close to when the Moon changed sign, the result may be uncertain without a precise ephemeris.

What if I don't know my exact birth time?

Try using your best estimate, or check your birth certificate or hospital records. Using noon as a default is common practice, but the result could be off if the Moon changed sign that day.

Is a Moon sign the same as a zodiac sign?

Your Moon sign is one of several placements in a birth chart. Your sun sign is based only on your birth date, while your Moon, Mercury, Venus and other placements each depend on the exact time and location of birth.

Related Calculators

Want your sun sign too? Try our zodiac sign calculator. Curious about the Chinese zodiac? See the Chinese zodiac calculator. Need your exact age down to the day? Check the age calculator. Converting a birth time across time zones? Try the time zone converter.