Age Compatibility (Tuổi hợp/khắc)
Check how two birth years match by the Chinese–Vietnamese zodiac — earthly branches, heavenly stems and birth-elements.
Frequently Asked Questions
How is age compatibility calculated?
From each birth year we derive the sexagenary pillar (heavenly stem + earthly branch) and the birth-element (nạp âm), then weigh three classical relations: the zodiac branches (tam hợp / lục hợp / lục xung / lục hại), the heavenly stems, and the two birth-elements.
My year clashes — does that mean we can't be together?
No. This is a traditional reference for reflection, not a verdict. Many "clashing" couples thrive with understanding. Treat it as one lens among many, for entertainment.
Which birth year should I enter?
Enter the solar (dương lịch) birth year. If you were born in January or early February before Lunar New Year, your zodiac animal belongs to the previous lunar year — enter that year instead.