Free Astrological Compatibility Calculator Tool


This little tool “rates” your compatibility with another person.

It looks at the synastry (planet and sign compatibility) between natal charts to arrive as percentage of compatibility.

The higher you rate the better your chances are for developing and maintaining a  loving, lasting union.

Fill out the form below with the first the name and date of birth for each person.

This tool does not take into account “houses” which are based on time and place of birth. It’s a fun — but very simple — astrological compatibility tool. 

For more information on astrological compatibility, and insight into the different planet combinations, check out Soul Mate Relationships: The Truth About Venus and Mars.

Get Your Birth Chart Wheel

Birth Date
Exact Birth Time

Tip: Make sure the UTC time offset is correct. If it's wrong, you can change it.

Be sure to check out other astrological calculator tools. 


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Let us know what your thoughts are!