Synastry chart

Synastry chart: what it is for

Synastry compares the birth charts of two people. The tool calculates the position of the Sun, Moon, Mercury, Venus and Mars for each one, draws the double wheel and lists the aspects between the two charts.

The result gives an overall compatibility score and four axes: emotion, conversation, love and attraction. Harmonious aspects appear in blue and tense ones in red.

How to use

1. Enter the date of birth of both people.
2. Type the names if you like.
3. See the score, the axes, the double wheel and the aspects.

When to use it

• Checking a couple's compatibility beyond the Sun sign.
• Understanding the strengths and friction points of a relationship.
• Comparing your chart with a friend's or a relative's.

Frequently asked questions

What is synastry?

It is the comparison of two birth charts. Astrology looks at the angles (aspects) that one person's planets form with the other's to describe the dynamics of the couple.

How is the score calculated?

The tool considers the aspects between the Sun, Moon, Mercury, Venus and Mars of the two people. Trines, sextiles and conjunctions add points; squares and oppositions take a little away. The Sun and Moon pair and the Venus and Mars pair weigh more.

Does a low score mean it will not work out?

No. Astrology has no scientific proof, and tense aspects are also read as attraction and growth. A relationship depends on respect, conversation and choices.

Is it really free?

Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 are free.

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