Moon Sign Calculator

Free moon sign calculator. Find your lunar zodiac sign based on birth date, time, and location. Discover your emotional nature, inner self, and moon phase at birth. Supports Tropical and Sidereal zodiac systems. Works without birth time.

Location is used for timezone correction to calculate the Moon's exact position at your birth.

Tropical zodiac aligned to seasons and equinoxes. Used in Western astrology.

Your Moon Sign

Scorpio

10°34Scorpio|Tropical

WaterFixed

Scorpio Moon Traits

Emotional nature and instinctive responses

Intensely emotional
Deeply perceptive
Private inner world
Transformative instincts

With your Moon in Scorpio, your emotional depth is unmatched. You feel with extraordinary intensity and have a penetrating ability to see beneath surface appearances. Trust is earned slowly, and you guard your inner world carefully. Transformation is a constant theme — you instinctively understand that emotional healing requires going through darkness, not around it.

Moon Phase at Birth

The lunar cycle phase when you were born

Third Quarter

Phase angle: 300.43°

Born under the Third Quarter Moon, you are introspective and revisionary. You question established structures and release what no longer serves your growth.

Moon Sign Compatibility

Elemental harmony with other moon signs

Most Compatible

CancerPiscesVirgoCapricorn

More Challenging

LeoAquarius

Compatibility is based on elemental harmony. Same-element and complementary-element moon signs tend to understand each other's emotional needs more naturally.

What Is a Moon Sign?

Your emotional core and inner self in astrology

Your Moon sign represents the zodiac sign the Moon was in at the exact moment of your birth. While your Sun sign reflects your core identity, ego, and conscious self, your Moon sign reveals your emotional nature, instinctive reactions, subconscious patterns, and inner world.

Why the Moon Matters

In astrology, the Moon governs emotions, intuition, memory, habits, and your sense of security. It shows how you nurture others, what you need to feel safe, and how you process feelings. Many astrologers consider the Moon sign equally important to — or even more revealing than — the Sun sign.

The Moon completes its orbit through all 12 zodiac signs approximately every 27.3 days, spending about 2.5 days in each sign. This is why knowing your birth time matters — the Moon can change signs during a single day, and the exact time of birth determines which sign the Moon was in when you were born.

How to Calculate Your Moon Sign

Using astronomical ephemeris data for precision

Calculating your Moon sign requires knowing the Moon's exact ecliptic longitude at the moment of your birth. This calculator uses NASA JPL ephemeris data via the astronomy-engine library for scientifically accurate positions.

  1. Gather your birth details — date, time (if known), and location
  2. Enter your birth date — select month, day, and year
  3. Enter your birth time — or check "I don't know" to see both possible signs
  4. Select your birth location — for timezone correction
  5. View your results — Moon sign, degree, traits, phase, and compatibility

Don't Know Your Birth Time?

If you don't know your exact birth time, this calculator checks the Moon's position at the start and end of your birthday. If the Moon changed signs during that day, both possible Moon signs are shown with their descriptions so you can read both and identify which resonates more with your emotional nature.

Moon Sign vs Sun Sign

Understanding the difference between your two key signs

AspectSun Sign ☉Moon Sign ☽
RepresentsCore identity and egoEmotional nature and inner world
GovernsWillpower, vitality, self-expressionFeelings, instincts, habits
VisibilityHow others see you publiclyYour private emotional responses
Changes Every~30 days (one month)~2.5 days
Birth Time NeededNo (just birth date)Helpful but not always required
RelationshipsHow you attract partnersWhat you need emotionally from partners

Your Sun sign and Moon sign work together. If your Sun sign is your "outward identity," your Moon sign is your "inner emotional truth." Someone with an Aries Sun might appear bold and direct, but an Aries Sun with a Pisces Moon will have a deeply sensitive, empathic inner world that they may not show publicly.

Moon Signs and Their Meanings

A quick overview of all 12 lunar zodiac signs

SignElementModalityEmotional Nature
AriesFireCardinalImpulsive, courageous, direct
TaurusEarthFixedSteady, loyal, comfort-seeking
GeminiAirMutableCurious, communicative, versatile
CancerWaterCardinalNurturing, intuitive, protective
LeoFireFixedWarm, generous, expressive
VirgoEarthMutableAnalytical, helpful, detail-oriented
LibraAirCardinalHarmonious, diplomatic, fair
ScorpioWaterFixedIntense, perceptive, transformative
SagittariusFireMutableOptimistic, adventurous, philosophical
CapricornEarthCardinalDisciplined, ambitious, reserved
AquariusAirFixedIndependent, humanitarian, unconventional
PiscesWaterMutableEmpathic, dreamy, spiritually attuned

Frequently Asked Questions

Common questions about moon signs and how this calculator works