House-building age check
Kim Lâu · Hoang Ốc · Tam Tai — all three Vietnamese feng shui factors.
Note: born in Jan–Feb before Lunar New Year? You belong to the previous lunar year — pick that year instead.
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ForLife stores Can Chi, element and building-age data for every family member — no need to recalculate. Family event reminders included.
Try ForLife free →Frequently asked questions
What is Kim Lâu and how is it calculated?
Kim Lâu is a feng shui taboo: when your ceremonial age (tuổi mụ) divided by 9 leaves remainder 1, 3, 6 or 8, you violate one of four types — Thân (harms yourself), Thê (harms your wife), Tử (harms your children) or Súc (harms livestock). Tradition advises not breaking ground at those ages.
What are the six Hoang Ốc stars?
Six stars rotate with ceremonial age (from 10 up): Nhất Cát ✓, Nhì Nghi ✓, Tam Địa Sát ✗, Tứ Tấn Tài ✓, Ngũ Thọ Tử ✗, Lục Hoang Ốc ✗. If your age lands on one of the three bad stars (3rd, 5th, 6th), tradition says skip building that year.
Is Tam Tai really dangerous?
Tam Tai is a run of three unlucky years (determined by your sign's harmony group). Tradition advises against building, marrying or major ventures during them. There is no scientific evidence — many Vietnamese still observe it for spiritual peace of mind.
What if all three factors conflict?
You can use mượn tuổi (borrowed age): a compatible relative or friend nominally leads the groundbreaking and initial feng shui steps, then the owner takes over. Or simply postpone to a clear year.
How is ceremonial age (tuổi mụ) calculated?
Ceremonial age = current year − birth year + 1. Example: born 1990, then in 2026 it is 2026 − 1990 + 1 = 37.