Enter two birth dates for a free summary of how you two relate: Day Masters, Five Elements and Earthly Branches. Works for partners, family, friends and coworkers.
Have both birth dates ready to start a free compatibility summary.
Birth times give the fullest result. If you don't know one, you can still see what the dates show and add the time later.
The free summary needs no account. The deep relationship report is optional.
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Calendar rules calculate the charts first; AI then explains the results. How your data is handled (new tab)
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Free result example · No Spirit Stones used
Strong attraction · Security needs work
The Five Elements support each other, but pressure can create a pursue-and-withdraw loop. The free summary first identifies the strongest support, the main friction, and one practical next step.
This is a fictional example using the real free-result structure. Your reading is calculated from both birth profiles and the relationship context you select.
A BaZi compatibility calculator compares two people's Four Pillars charts. The free summary covers Day Masters, Five Elements and your main relationship pattern; with both birth hours it also compares Earthly Branches, Ten Gods, the Spouse Palace and timing, all explained in plain English. It works for partners, exes, family, friends, coworkers and business partners. Ba-Zi.ai is the official website of GuanXiang (观象).
First, each person's birth date, time and place become a Four Pillars chart: Heavenly Stems, Earthly Branches, Day Master and Five Elements. Next, the two charts are compared across Day Masters, Earthly Branches, Five Elements, the Spouse Palace, Ten Gods, luck cycles and the current year. Finally, AI explains what those signals mean for your relationship in plain language. If a birth hour is unknown, you still see what the dates can show, and you can add the hour later for the full comparison.
Don't treat the overall score as a verdict. Start with the relationship pattern and the strongest support, then find the area causing the most friction. Check it against the Day Master, Five Elements, Spouse Palace and timing notes to see whether it's a lasting pattern or a passing phase. The result is most useful when it turns a vague worry into a concrete conversation about conflict, responsibility, support, money or commitment. Run it again if birth details change or you want to ask about a different relationship.
Q: What does BaZi compatibility compare?
A: It compares Day Master relationship, Five Elements balance, Earthly Branch clashes and combinations, Ten Gods roles, Spouse Palace signals, and luck-cycle timing between two charts. These signals help explain attraction, communication friction, emotional rhythm, marriage pressure, and long-term growth patterns. The combined picture matters more than any single clash, combination, or element score.
Q: Is BaZi compatibility accurate?
A: The charts follow fixed BaZi rules, so the same birth details always give the same charts. What they mean for a relationship is a traditional interpretation, not a scientific test, and the AI's wording can vary. Use it to find questions worth talking through, not to make the decision for you.
Q: Can I use BaZi compatibility without an exact birth hour?
A: Yes. If either birth hour is unknown, you still see what both birth dates can show. Scores, favorable elements, luck-cycle timing and the deep relationship report need both hours, so they appear once you add them.
Q: Is this calculator only for romantic relationships?
A: No. You can choose a romantic partner, spouse, ex, parent or child, family member, friend, coworker or business partner, or describe your own relationship. The reading changes with your choice: a clash that shows up as romantic tension may show up as decision-making friction between business partners.
Q: What if the compatibility result is low?
A: A low result does not automatically mean the relationship should end. Look at which dimension lowered the assessment: communication rhythm, role expectations, emotional support, practical pressure, or timing. A specific friction pattern is more actionable than the overall score. Use it to test whether both people can recognize and manage the issue in real life.
Q: Does BaZi compatibility predict marriage timing?
A: It can highlight periods when commitment, distance, conflict, family pressure, or practical marriage decisions may become more prominent across both charts. These are timing windows, not guaranteed events. They are most useful for planning conversations and noticing pressure early, especially when both partners' luck cycles activate the same relationship theme.