Hoang Oc Calculator
Determine Hoang Oc palace status for residential construction, distinguishing auspicious from inauspicious timing and age-borrowing protocols.
Input Parameters
Live Result
Hoang Oc Evaluation for 2026
Details
Quick Answer & Understanding Your Result
The Hoang Oc (literally 'Deserted Mansion') calculation is the foremost traditional astrological metric governing residential ground-breaking, major building renovations, and roof-raising ceremonies. As the ancient adage confirms: 'Avoid Kim Lau for marriage, avoid Hoang Oc for building.' The cycle revolves around 6 cyclical palaces determined by lunar age:
3 Auspicious Palaces (Recommended for Construction)
- 1. Nhat Cat (Prime Auspicious): Ensures stable, tranquil settlement and thriving career endeavors.
- 2. Nhi Nghi (Second Prosperity): Multiplies land, property holdings, and domestic financial abundance.
- 4. Tu Tan Tai (Fourth Influx of Wealth): Supreme palace for commercial success, attracting boundless fortune.
3 Inauspicious Palaces (Strictly Avoid Direct Ground-breaking)
- 3. Tam Dia Sat (Third Earth Hazard): Inauspicious palace; risks lingering family illness and medical expenses.
- 5. Ngu Tho Tu (Fifth Mortality): Severe discord palace; risks domestic estrangement and emotional separation.
- 6. Luc Hoang Oc (Sixth Deserted Mansion): High disruption palace; construction encounters structural hurdles, delays, and financial waste.
Remediation via Age-Borrowing
If the homeowner's lunar age triggers an inauspicious palace, the authentic remedy is to perform the traditional 'Age Borrowing' (Muon Tuoi) ceremony, inviting an auspicious male relative to break ground on their behalf.
Enter your birth year and target construction year above to inspect your Hoang Oc status.
Formula & Calculation Logic
Mathematical FormulaTraditional finger-joint reckoning progressing clockwise through the six palaces, combining decade milestones with individual unit year increments.
Step-by-Step Guide
Enter Birth Year
Provide your solar birth year to determine your lunar age.
Enter Construction Year
Select the year of intended building or roof-raising.
Review Hoang Oc Palace
Discover which of the 6 palaces applies and review the ancient mnemonic verse.
Apply Age-Borrowing Protocol
If inauspicious, review age-borrowing protocols to proceed safely.
Worked Examples Table
| Example | Input Values | Calculated Result | Explanation |
|---|---|---|---|
| Host born 1990 building in 2026 | Age 37 falls into Tu Tan Tai, attracting thriving prosperity and commercial success. | ||
| Host born 1988 building in 2026 | Age 39 triggers Luc Hoang Oc; delegate ceremonial ground-breaking to an auspicious relative. |
Frequently Asked Questions
Evidence-Based Methodology & Authoritative References
Vietnam Academy of Social Sciences
Institute of Han-Nom Studies - Architectural Metaphysics
Standard: ISO / W3C / IETF Authoritative Domain Standard
Formula: Hoang Oc Palace = Cyclical 6-palace calculation: Age 10 at Nhat Cat, 20 at Nhi Nghi, 30 at Tam Dia Sat, 40 at Tu Tan Tai, 50 at Ngu Tho Tu, 60 at Luc Hoang Oc
Last Reviewed: August 21, 2026
Primary Source: Vietnam Academy of Social Sciences
Reference Document: Institute of Han-Nom Studies - Architectural Metaphysics
Computation Privacy: 100% client-side 0ms computation, zero data retention
Traditional calendar, cultural, and spiritual calculations are derived from Eastern cultural folk traditions and historical reference literature for personal research and cultural appreciation.
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Calculated results are modeled based on standard scientific and mathematical formulas. Please verify with domain-specific technical documentation for specialized applications.