What do the compatibility notes actually mean?

Each note describes a classical pattern between the two charts, such as one Day Master generating or controlling the other. The notes are descriptive rather than scored, so they indicate the character of an interaction and not the quality or likely success of a relationship.

Is this a prediction about my relationship?

No. The result is offered for reflection only. It does not forecast whether a relationship will last and should never be used as a reason to start or end one. Charts showing many clashes often belong to people who understand each other well.

Does Bazi use Chinese New Year or Li Chun as the year boundary?

Zi Ping Bazi uses Li Chun, the solar term that begins spring around February 4, as the start of the year. It does not use Chinese New Year. Anyone born in January or early February belongs to the previous solar year for the Year Pillar.

Where does the practice of matching charts come from?

It grew out of the correlative cosmology systematised during the Han dynasty, which paired the Heavenly Stems and Earthly Branches with the five phases and yin yang. Matching charts before marriage became common in late imperial China and continues today as one consideration among many.

Four Pillars

Bazi Compatibility

Enter two birth charts to explore how your elemental energies interact. For reflection and self-awareness. Not a verdict on any relationship.

This tool explores elemental and symbolic interactions between two Bazi charts for cultural reflection only. It is not a prediction of relationship success or failure, and is not a substitute for your own judgment, experience, or professional guidance.

Relationship type

Person A

Name or label (optional, shown in results)

Birth Date

Birth Time (24-hour)

Gender (for some interpretations)

Time Zone (UTC offset)

True Solar Time (optional)

Adjusts clock time for longitude difference from the UTC meridian.

Person B

Name or label (optional, shown in results)

Birth Date

Birth Time (24-hour)

Gender (for some interpretations)

Time Zone (UTC offset)

True Solar Time (optional)

Adjusts clock time for longitude difference from the UTC meridian.

How Does the Bazi Compatibility Explorer Work?

The tool takes two sets of birth details, date, time, and place, and builds a Four Pillars chart for each person. Each chart yields a Day Master, the Heavenly Stem of the day pillar, which classical practice treats as the core signature of the person. The comparison then reads three layers. First, the relationship between the two Day Masters through the five phases, where each element generates one element and controls another, producing patterns traditionally described as supportive, draining, or competing. Second, the interaction between the Earthly Branches of both charts, checking for the six harmonies, the six clashes, and the three way combinations. Third, the overall elemental balance of the two charts read together, noting whether one chart supplies what the other lacks. The output is a set of descriptive notes for each layer, not a score of relationship quality. The generating and controlling cycles that underpin this reading are set out in the Internet Encyclopedia of Philosophy entry on wuxing.

How Should You Use This Result?

Read the output as a prompt for reflection, not a prediction about a relationship. Nothing here forecasts whether a partnership will last, and no result should be treated as a reason to begin or end one. The descriptions come from rule based classical patterns, so two charts showing many clashes may belong to people who understand each other well, and two charts that harmonise on paper may still ask for patience in daily life. One technical point affects accuracy. Zi Ping Bazi sets the year boundary at Li Chun, the solar term marking the start of spring around February 4, not at Chinese New Year. A birthday in January or early February therefore belongs to the previous solar year for the Year Pillar. If either person was born in that window, check the year assignment before reading the comparison. This page offers cultural context only. It is not fate, medical, financial, or psychological advice.

What Is the Cultural Background?

Reading two charts together grew out of the same correlative cosmology that shaped Bazi itself. Systematised during the Han dynasty, this framework paired the ten Heavenly Stems and twelve Earthly Branches with the five phases and yin yang, then applied the resulting grid to time, medicine, governance, and human character. Matching charts before a marriage became common in late imperial China and continues in parts of East and Southeast Asia today, usually as one consideration among many rather than a decisive test. See the Stanford Encyclopedia of Philosophy entry on Han dynasty thought for the intellectual context.

What This Tool Does Not Measure

Compatibility in classical practice is narrower than the modern word suggests. The traditional reading looks at elemental interaction between two charts, not at the many things that actually shape a relationship: shared values, communication habits, family circumstances, timing, and ordinary daily effort. A practitioner working in this tradition would also examine each person's luck pillars, the current annual pillar, and the palaces relevant to partnership, none of which this page computes. Treat the notes above as a description of one classical pattern, offered for interest, and let your own experience of the relationship carry the weight.