Synastry Chart Tutorial

Learn how to compare two birth charts and explore relationship compatibility.

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1 Add Two Birth Profiles

A synastry chart compares two birth charts, so you need two persons saved in your account first.

  • Go to your Dashboard and click Persons
  • Click Add Person and fill in the first person's birth details
  • Enter their First Name, Last Name, Birth Date, and Birth Time
  • Select Country and City — coordinates and timezone fill in automatically
  • Click Save, then repeat the process for the second person
Tip: Accurate birth times for both persons are essential for precise synastry analysis. If the exact time is unknown, noon is commonly used as a default.

2 Create a Synastry Chart

With both persons saved, you can now create a synastry chart to compare their birth charts.

  • Go to your Dashboard and click Charts
  • Click Add Chart
  • Select Synastry from the Chart Type dropdown
  • Choose Person 1 and Person 2 from the dropdowns
  • Enter a Chart Name (e.g., "John & Jane")
  • Click Save — the chart is calculated instantly
Tip: Person 1's birth data is used as the base chart. Person 2's planets are overlaid on top for comparison.

3 View the Synastry Chart

Your synastry chart displays both persons' planets on a dual wheel, along with a cross-aspect grid.

  • Open the chart from your Charts list by clicking the view icon
  • The inner wheel shows Person 1's planets and houses
  • The outer wheel shows Person 2's planets overlaid on Person 1's houses
  • The cross-aspect grid below shows all aspects between the two charts

4 Explore Composite Data

The synastry chart also computes composite midpoint data, which represents the relationship as a single chart.

  • Scroll below the synastry wheels to find the composite data section
  • Composite positions are midpoints of each planet pair between the two charts
  • This represents the combined energy of the relationship
Tip: Composite data is calculated on-the-fly and displayed alongside the synastry chart — no separate chart needed.

5 Generate a Compatibility Report

Unlock detailed relationship insights by generating a compatibility report from your synastry chart.

  • Go to your Charts page
  • Click the reports icon on your synastry chart's row
  • Choose a report: Synastry Pro for general compatibility or Love Compatibility for romance-focused insights
  • Click Generate and read the personalized interpretation
  • Use the download button to export the report as a PDF
Tip: Reports use both persons' names throughout the text for a truly personalized reading.

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