Moon Sign Compatibility Calculator
Two Moon signs · Elements and modalities · Aspect and orb
Compare two Moon signs, their elements and modalities, and any qualifying Moon-to-Moon aspect. Enter both birth dates and places, with times when known. This free calculator compares positions; it cannot measure how two people feel about each other.
How to Check Moon Sign Compatibility
Compare two Moon signs and the aspect between them.
- 1. Enter the first person's birth date, time, and place
- 2. Enter the second person's birth details
- 3. See both Moon signs, their element and modality blend, and the exact Moon-to-Moon aspect
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FAQ
Do I need both birth times?
Birth times matter here because the Moon moves noticeably during the day. An unknown-time estimate can change the orb or, near a boundary, the sign. If either time is uncertain, read the result as provisional rather than treating the displayed degrees as recorded birth positions.
Does matching Moon signs guarantee emotional compatibility?
No. Signs and aspects are astrological descriptions, not measurements of emotional safety, shared values or relationship success. Two people with the same Moon sign can have different habits and needs. Ask the people rather than using a chart to decide for them.
Does the calculator use birth dates or a sign-pair table?
It calculates both charts from the entered birth details, then shows the Moon signs and any qualifying contact between their positions. That differs from selecting two sign names alone. Unknown birth times make the degrees provisional and can change the sign near a boundary.
Should I use this or the full compatibility report?
Use this free preview for the Moon comparison without signing in. The full report on the compatibility page covers a broader set of contacts and a written interpretation, with sign-in and account allowances. Neither provides a validated success percentage.
Why can two fire Moons have no trine in the results?
Elements group signs, while aspects compare positions. As a simple zero-latitude example, 0° Aries and 29° Leo are both in fire signs but are 149° apart, far outside this tool’s 6° trine orb around 120°. The same-element label and the measured aspect therefore answer different questions.