Cast a Human Design composite

Enter both birth records: the tool casts two bodygraphs, overlays their gates into a composite, and lists the electromagnetic channels, shared gates, compromise and dominance and all nine centers.

What kind of relationship is this?

Set this first: it decides which houses the reading looks at and how the five themes are ordered.

The type never enters the numbers: switching it leaves every aspect and placement identical. Now: No relationship type assumed; read the overall interaction first

What do you most want to see clearly?

Pick the closest one, or write it in your own words. Once the chart is cast, the reading answers it against both charts.

A

Person A

Synastry casts one natal chart per person, then reads the relationship between them. Order only decides which side is which.

Birth details · Person A

Calendar

Minute precision is enough for gate and line; color is indicative, while tone and base need a birth time to the second

Linked timezone Asia/Shanghai · Longitude 116.4074° · Latitude 39.9075°

Astrology restores the UT instant from the recorded clock time (including historical offsets and DST), then uses latitude and longitude for the Ascendant and houses. Accuracy matters: the Ascendant moves about 1° every 4 minutes.

B

Person B

Birth details · Person B

Calendar

Minute precision is enough for gate and line; color is indicative, while tone and base need a birth time to the second

Linked timezone Asia/Shanghai · Longitude 116.4074° · Latitude 39.9075°

Astrology restores the UT instant from the recorded clock time (including historical offsets and DST), then uses latitude and longitude for the Ascendant and houses. Accuracy matters: the Ascendant moves about 1° every 4 minutes.

Fill in both birth details first

Names are used for the chart title only and never enter the calculation; birth details stay in the link and are not stored on the server.