What this tool helps you explore
The composite chart looks at a relationship as a whole. While synastry compares two people, this tool combines positions from both charts to explore the relationship's tone, support and tensions.
✦ Your reading
A chart for the bond you create together: its tone, support and tensions.

Midpoints along the shorter arc between matching planets’ tropical longitudes. Opposite or ambiguous points are omitted. Birth dates are not averaged. Known times allow the midpoint of both ascendants and whole-sign houses; this is a composite convention, not a real horizon. Without a time, Moon, ascendant and houses are omitted, and other aspects have limited precision.
Symbolic meaning; the calculation does not establish personal traits or predict events.
A moment to bring the details of your reading together.

Composite Relationship Chart
A symbolic reading for reflection, not a guaranteed future.
You can save the complete reading, add notes or share the result.
A chart for the bond you create together: its tone, support and tensions.
The composite chart looks at a relationship as a whole. While synastry compares two people, this tool combines positions from both charts to explore the relationship's tone, support and tensions.
Enter both people's birth details, select their cities and indicate whether times are known. Calculate the chart and explore the available planets, contacts and sections. You do not need to average dates or make calculations yourself.
Positions are symbolic midpoints, not the actual birth sky of a third person. Read contacts as relationship themes. Missing times mean less information; absent houses or Moon positions do not describe a quality of the relationship.
Midpoints along the shorter arc between matching planets’ tropical longitudes. Opposite or ambiguous points are omitted. Birth dates are not averaged. Known times allow the midpoint of both ascendants and whole-sign houses; this is a composite convention, not a real horizon. Without a time, Moon, ascendant and houses are omitted, and other aspects have limited precision.
Yes. Save reading and Share appear when it finishes. My readings lets you reopen it, add notes and download text without an account. Data is saved in this browser.