Birth Chart Compatibility

Compare two birth charts with a clear synastry preview.

This page is for people who want more than sign-only matching. Start with two birth charts, preview relationship themes, and then continue into deeper relationship astrology when you are ready.

Create your compatibility preview

Add two sets of birth details to preview key relationship themes. Birth time helps improve house overlays and Ascendant-sensitive indicators.

If birth time is unknown, you can still start with a lighter preview. House overlays and some timing-sensitive details stay limited until more exact data is available.

Want a deeper relationship reading than a quick web preview?

Use the website to compare two charts quickly. Use the app when you want stronger continuity, fuller relationship interpretation, and a better place to return to your compatibility reading later.

Download The App

Why this goes deeper than Sun sign compatibility?

Sun sign matching is a useful starting point, but synastry compares two whole charts. Astrology.com explains that synastry layers two charts and looks at houses, signs, elements, aspects, and planets together; Cafe Astrology also notes that Sun sign compatibility has value but remains general because many other factors are involved.

Two charts, not one label

Sign-only matching asks whether two Sun signs get along. Synastry compares how the two full natal charts interact, which gives a more personal and less generic starting point.

Aspects change the story

Ask Astrology emphasizes that synastry looks at how planets interact through aspects. That helps explain why two people with "compatible" signs can still feel very different in practice.

Houses add life context

Astrology.com points out that house placement in synastry helps describe how each partner affects the other and what area of life gets activated in the relationship.

Learn More About Birth Chart Compatibility

Why birth time matters on this page?

Birth time matters more here than on a simple sign match page because Ascendant-sensitive layers and house overlays change the reading. When birth times are unknown, scores become less definitive—but you can still start with a lighter preview.

House overlays depend on time

Without accurate times, it is harder to know exactly where one person's planets fall in the other person's houses.

Ascendant and angles shift quickly

Rising sign, Descendant, and other chart angles can change fast enough to alter how the relationship is framed.

Unknown time still works as a lighter start

You can still use this page without exact times, but the most detailed relationship layers are better reserved for the app or a fuller report.

Birth chart compatibility FAQ

Is birth chart compatibility the same as Sun sign compatibility?

No. Sun sign compatibility is a lighter starting point. Birth chart compatibility compares two whole charts, which is why it can describe the relationship more personally and in more detail.

What is a synastry chart?

A synastry chart compares two natal charts to see how planets, signs, houses, and aspects interact between two people. It is one of the most common tools for relationship astrology.

Do I need birth time for chart compatibility?

Birth time is strongly recommended. Without it, some details—especially house overlays and angle-sensitive factors—become less exact. A lighter preview still works, but it is less complete.

What should I do after this preview?

A good next step is to read a basic synastry guide, compare this result with sign compatibility, or move into the app if you want a deeper relationship reading.