RegisterLog in
Compatibility calculator

Synastry calculator: compare two birth charts

Build a symbolic relationship outline from two birth profiles: emotional rhythm, attraction, communication, friction, responsibility and repair.

Enter both profilesOpen Love HubTry Love Tarot

Two people required

Synastry needs exact birth data for both people. The result is not proof of destiny or another person's feelings.

This astrology tool is for symbolic reflection and self-awareness. It does not guarantee future events and does not replace medical, legal, financial, mental health, or professional advice. Precise birth-chart work requires birth date, exact birth time, birthplace, coordinates, and time zone.

Enter both birth profiles

Person A

City not listed? Enter coordinates manually

Use this only when the city is missing from the list. If you choose a city, these values are filled automatically.

Person B

City not listed? Enter coordinates manually

Use this only when the city is missing from the list. If you choose a city, these values are filled automatically.

Your astrology result appears below this form. Keep the data exact, then read the output as a symbolic outline with practical limits.

After you use the tool, the result area below should show the first visible answer. Read it once before repeating the calculation or opening a related report.

How to read the synastry outline

Two profiles

Both people need date, exact time and city before comparison.

Result layers

The outline organizes symbolic themes of emotional rhythm, attraction, communication, friction, and repair.

Reality check

No compatibility result can prove feelings or future behavior.

Relationship charts

Synastry: how two charts interact

Synastry compares two natal charts. It should show emotional rhythm, attraction, communication, friction and repair conditions without turning compatibility into a verdict.

Moon contacts

Show comfort, care, emotional safety and daily reassurance.

Venus and Mars

Show affection, attraction, desire and conflict style.

Mercury

Shows how people explain, listen, misunderstand and repair.

Saturn

Shows commitment, pressure, maturity and possible heaviness.

Professional reading order

Use this route as a working page, not a loose glossary. A stronger result comes from data quality, layered interpretation and a clear limit.

  1. Enter both chartsBoth people need date, exact time and place or manual coordinates.
  2. Read support and frictionA good comparison names both ease and work.
  3. Return to behaviorThe result matters only if it helps real communication and boundaries.
Compatibility reportBirth chart