Synastry: how to read two birth charts together

Synastry is an astrological method of comparing two horoscopes — two birth charts, the circles built from the date, time and place of birth. It looks at the dynamic, the compatibility and the potential between two people.

Put simply, synastry does not just answer “do we suit each other?” — it shows:

• where you naturally complement and support each other,
• which areas may bring misunderstandings or conflict,
• and what overall energy the two of you create together.

How it works

The two charts are laid over each other. Your planets then form angles with the other person's planets — in astrology these are called aspects. They are what tells you where two people understand each other without words, where they are drawn together, and where they get on each other's nerves.

What synastry does not say

It does not say whether a relationship will last, or whether you should be together.

It is a map, not a prediction. It shows where things come easily between you and where they take more effort — and that is something you can work with. A relationship rests on what two people do, not on what came out of a circle.

Eight areas instead of one number

A single number — “78% match” — tells you nothing. That is why the relationship is broken down into areas that work on their own:

• Partnership — how the two of you work as a team; dynamic and complementarity
• Attraction — the physical and erotic level
• Communication — whether you understand how the other thinks and speaks
• Emotional — whether you feel safe with each other
• Endurance — whether it holds once the infatuation fades
• Platonic — the depth of friendship, romance aside
• Fated — the sense that this meeting had a reason
• Plutonian — transformation and intensity; a relationship that changes both

On top of that comes friction — how much tension there is between you. Zero is not good news: a relationship without friction tends to be calm but not very alive.

So it can happen that with someone you get high depth and low attraction. That is not a mistake in the calculation — it is exactly the kind of bond that works as a friendship and not as a romance.

What you need for it

The date, time and place of birth of both people.

The time matters. Without it the houses — the twelve areas of life the circle is divided into — cannot be calculated, and synastry then says less. If you don't know the time, the app simply says so and leaves the houses out. It does not fill in what it doesn't know.

And yours has names, not just scores

This is the part a general article cannot give you: the actual contacts between your two charts, named one by one. Not “you are 78% compatible”, but Sun – Moon · conjunction: basic partner compatibility, you complement each other naturally — and next to it the one that rubs.

You also get both wheels drawn over each other, how many connections the two charts make in total, and the numbers for partnership, depth and friction — so you can see where the bond is carried and where it is thin.

You need a free account for this, and the other person's birth data. No payment.

What you take away

Not a verdict on the relationship, but a point of view — a way of looking at what happens between two people that you did not have before. That is what the whole app is for.