Bazi Compatibility 八字合盘

Compatibility in Bazi is not about zodiac animals — it is about how two complete charts interact. This free calculator compares two birth charts across the four layers a practitioner checks first: the Day Master relationship, the spouse palace (day branches), the year branches, and whether your elements fill each other's gaps. And it isn't only for couples — choose from six relationship lenses: romantic partners, friends, colleagues, boss & subordinate, parent & child, or business partners.

Last updated: July 2026

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Bazi Compatibility Calculator 八字合盘

Enter two birth dates and see how the charts interact — Day Master dynamics, spouse palace, zodiac branches and combined element balance. Free, solar-time adjusted.

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Person A

Person B

What This Comparison Reads

Day Masters are the two selves. Some pairs form classical stem unions (甲己, 乙庚, 丙辛, 丁壬, 戊癸) — an instinctive pull the classics rate as the strongest natural pairing. Others nourish, mirror, or discipline each other, and each dynamic has its own texture.

The spouse palace is the branch under each Day Master — the seat of marriage in a chart. When two people's day branches form 六合 (Six Harmony) or share a trinity (三合), the charts sit comfortably in each other's most intimate palace. A 冲 (clash) here is the classic "passionate but stormy" signature.

Year branches are the zodiac-level check most people already know — Rat clashes Horse, Ox harmonises Rat. It matters, but it is the coarsest layer; treat it as background.

Combined elements ask a subtler question: do the two charts complete each other? A Fire-scarce chart paired with a Fire-rich one is classically favourable — each becomes medicine for the other.

Beyond Couples: Six Relationship Lenses

The same structural signals mean different things in different relationships, so the calculator reweights them by lens. For romantic partners, the spouse palace carries the most weight — that is its classical function. For friends and colleagues, the day branch reads instead as the inner seat (day-to-day comfort in each other's company) and year-branch harmony and element balance count for more. For boss and subordinate, the direction of the Day Master relationship matters: a senior whose Day Master controls the junior's sits in the classical authority structure, while a junior who controls the senior means the reporting line runs against the natural current. For parent and child, the nurture direction — whose element produces whose — is the first thing read. And for business partners, element complementarity is weighted highest: partners who supply what the other's chart lacks are the classical co-founder signature.

What the Score Doesn't Know

The score reads structure, not strength. Whether your partner's abundant Metal helps you depends on whether Metal is your useful god or your burden — and that requires judging each chart individually first. It also can't see timing: some pairs are easy in this decade and hard in the next as luck pillars shift. For the full picture, book a couple reading with Master Yuan — both charts, read together, S$180 for 60 minutes.

  • A practitioner compares how two complete charts interact: the Day Master relationship (including classical stem unions), the day-branch (spouse palace) interaction, year-branch relations, and whether the combined charts balance the five elements. This calculator runs all four checks instantly.

  • No. Your zodiac animal is one character out of eight. Two "incompatible" animals can have beautifully matched charts, and two "compatible" animals can clash in the spouse palace. Bazi reads the whole chart.

  • Above 70 indicates structurally favourable charts; 55–69 is the workable band where most real partnerships live; below 55 flags significant clashes worth understanding properly. No score is a verdict — it is a map of where the work is.

  • No. Structural friction is information, not fate. Many enduring couples carry clashing charts knowingly; the clash even supplies the spark. A low score is a reason to understand the specific friction, not to panic about the relationship.

  • Times improve accuracy (they set the hour pillar and refine the day boundary), but the core comparison — Day Masters, spouse palaces, year branches — works from dates alone. Tick "Time unknown" if needed.

  • Yes — pick the relationship in the dropdown. The calculator reweights the same structural signals per lens: element complementarity counts most for business partners, year-branch harmony for friends, and the direction of the Day Master relationship for boss–subordinate and parent–child pairs. Outside romance, the day branch is read as the "inner seat" rather than the spouse palace.

  • It reads the structural fit between two specific charts, not anyone's absolute quality. A senior whose Day Master controls the junior's has the classical authority dynamic; a junior whose Day Master produces the senior's is the loyal-lieutenant signature. The same person can be an easy boss for one chart and a hard one for another.