Bazi Compatibility Calculator

Partners, friends and business collaborators

Compare two complete birth charts for a free reference score. A private analysis explains the match, differences and practical ways to work with them.

Person A

A label for your reference. Names do not affect the score.

Select a result to confirm the location and historical time zone.

Person B

A label for your reference. Names do not affect the score.

Select a result to confirm the location and historical time zone.

All three use the same structural score. The private reading addresses this relationship.

No account or credit needed for a score.

What the score means

This site’s versioned reference index combines each chart’s strength background, structural roles and seasonal requirements. It checks both directions and preserves multiple reasonable interpretations. The public score takes the conservative lower bound of complete scenarios; the private report shows the range and the evidence behind it.

The numerical weights are our modern design: strength 35%, structure 40%, seasonal requirements 25%. Bilateral aggregation gives more weight to the less favourable direction. Classical texts inform the evidence, while the number is not a classical formula or a relationship success probability.

Complete birth inputs matter

Both dates, known times and locations with historical time zones are required. Year and month boundaries follow absolute solar-term instants; day and hour use local true solar time. An unknown time receives no score and uses no credit. The score uses natal structure only; luck cycles and annual timing are excluded.

One index, three kinds of relationship

Partner, friendship and business analyses share the same total score. Their private readings address different questions: communication and needs, reciprocity and boundaries, or responsibilities and decision making. No score is advice to marry, end a friendship or start a venture.

Privacy and access

Guest births are used only for the calculation. Signing in can carry a short-lived, one-time draft; saving charts still requires confirmation. Detailed analyses require a valid purchased credit and remain private in My Reports. Reopening a saved analysis does not use another credit. Refunding its source purchase revokes access.

Read the Bazi compatibility guide, privacy policy and analysis terms. Explore other calculators in Tools.