Astrology

Synastry chart: two birth charts compared

Enter the birth details of two people. One chart is laid over the other, the contacts between their planets are listed with where each person's planets fall in the other's houses, and the composite chart reads the pair as a chart of its own.

The results are symbolic, for study, self-reflection and entertainment. They are not a prediction and not professional advice.

Enter the birth details of two people. Their charts are laid over each other, the contacts between them are listed, and the composite chart shows the relationship as a third thing.

First person

Local time, as exact as it is known. The rising sign moves one degree about every four minutes.

  • No country found by that name.
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  • No place found by that name.
  • The list of places could not be loaded. Check your connection and try again.

If the birthplace is not listed, choose the nearest town.

Second person

Local time, as exact as it is known. The rising sign moves one degree about every four minutes.

  • No country found by that name.
  • Searching…
  • No place found by that name.
  • The list of places could not be loaded. Check your connection and try again.

If the birthplace is not listed, choose the nearest town.

The name and the date and time of birth stay in your browser. They are not sent to us and not saved.

Houses of

The composite chart

The composite chart puts every planet and house cusp halfway between the two people's, and reads the relationship as a chart of its own. Its Ascendant and houses rely on both birth times.

Learn to read it

Zodiac Signs Explore your sign Planets 101 What each planet means Houses What each house means Astrology Aspects How planets interact

Frequently asked questions

What is a synastry chart?

Two birth charts read against each other. The page puts one person's planets around the other's chart, lists the aspects between their planets, and shows which house of each chart the other person's planets fall in.

What is the composite chart?

A third chart made from the two: every planet and house cusp sits halfway between the two people's. It reads the relationship as a chart of its own. Its Ascendant and houses rely on both birth times.

Does synastry say whether two people are compatible?

It shows a pattern of ease and friction between two charts, not a verdict on the relationship. What the two people do with it stays their choice.

What if one birth time is unknown?

The planets in signs and most of the contacts still hold. The houses, the overlays and the composite Ascendant depend on the birth times, so they are less reliable without them.

Is the birth data saved?

No. Both charts are calculated in your browser. The names, dates and times of birth are not sent to us. What you type in the place search is sent, so that we can return the matching places.

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