Free Moon Sign Calculator
Find your natal Moon sign, exact zodiac degree, house placement, and emotional interpretation from precise birth details.
Free astrology tool
Calculate your Moon Sign
Use your birth date, exact time, and city to find the Moon's zodiac sign and position in your natal chart.
Your exact result appears here
Calculate your natal Moon sign, exact degree, house, and emotional interpretation. The calculation uses the same focused endpoint documented for developers.
View Simple Signs API documentationWhy calculation matters?
The Moon moves 13° a day. Date-based lookups are often wrong. We calculate the exact second.
Precision Timing
Vital for users born on days when the Moon changes signs. We guarantee 100% accuracy using NASA-grade ephemeris data.
Emotional Insight
Our "Improved" interpretation style focuses on emotional needs and subconscious patterns, perfect for wellness apps.
Poetic Option
Toggle style: "poetic" for a more lyrical, soulful description of the user's inner moon landscape.
Built for Relationship Apps
Moon signs are crucial for compatibility (Synastry). Use our lightweight endpoint to quickly match users based on emotional resonance.
Fast Response
~80ms response time for rapid matching.
House System Choice
Supports Placidus, Whole Sign, Koch, and more.
curl -X POST "https://api.freeastroapi.com/api/v1/western/signs/moon" \
-H "Content-Type: application/json" \
-H "x-api-key: YOUR_KEY" \
-d '{
"year": 1990,
"month": 5,
"day": 15,
"hour": 14,
"minute": 30,
"city": "New York",
"zodiac_type": "tropical",
"house_system": "placidus"
}'Frequently Asked Questions
How is this different from the Moon Phase API?
The Moon Phase API calculates the *illumination* (Full, New, etc.) for visual calendars. This **Moon Sign API** calculates the *zodiac placement* (e.g., Moon in Scorpio) for psychological profiling.
Do I need exact birth time?
Ideally, yes. The Moon moves quickly. However, finding the Moon Sign is often possible with just the date, unless the person was born on a day the Moon changed signs. In those cases, time is mandatory for accuracy.
Can I calculate compatibility?
Yes! Use the `abs_pos` from two users to check the angle between their moons. Or use our dedicated Synastry Endpoint for a full report.
Discover Your Inner Self
Start calculating detailed emotional profiles today.