Luoban Feng Shui Ruler Calculator
Check auspicious and inauspicious dimensions across 52.2cm, 42.9cm, and 38.8cm traditional Luoban rulers.
Input Parameters
Live Result
Interactive Luoban Ruler (Auspicious / Inauspicious Sectors)
52.2 cm Aperture Ruler (Clear Opening / Doors & Windows)
Abundant fortune, successful offspring, and overflowing joy
Details
Steps
Select Luoban ruler standard based on purpose (52.2cm Aperture, 42.9cm Furniture, 38.8cm Altar)
Divide measurement modulo ruler cycle length to find sector position
Verify whether sector falls into Auspicious Red Zone or Inauspicious Black Zone
Quick Answer & Understanding Your Result
The Luoban Ruler (Thuoc Lo Ban) maps a measurement to a traditional auspicious or inauspicious sector.
How the reference works
- Select the 52.2cm, 42.9cm, or 38.8cm ruler system.
- Enter a measurement in centimeters.
- Review the resulting sector.
This is a traditional feng shui reference, not a building-code measurement standard.
Formula & Calculation Logic
Mathematical FormulaCalculates the modulo offset within the repeating dimensional cycle (52.2cm, 42.9cm, or 38.8cm) and maps it to the corresponding auspicious or inauspicious sector.
Step-by-Step Guide
Enter Measurement
Enter the clear opening width, height, or furniture length in centimeters.
Select Ruler Standard
Choose 52.2cm for doors/windows, 42.9cm for furniture/beds, or 38.8cm for altars.
Inspect Visual Ruler
View the real-time indicator on the tape measure track to see if it lands on a Red (Good) or Black (Bad) sector.
Adjust Dimensions
Fine-tune your architectural blueprint to align with auspicious red dimensions.
Worked Examples Table
| Example | Input Values | Calculated Result | Explanation |
|---|---|---|---|
| Standard Single-Leaf Bedroom Door | Falls within the 52.2cm ruler's Phuc Loc sector (78.3cm - 84.8cm), bringing peace and prosperity. | ||
| Main Entrance Door: 107cm (Noble Mentors) | Provides instant quantitative evaluation for comparative practical analysis. |
Frequently Asked Questions
Evidence-Based Methodology & Authoritative References
Ancient Chinese Architectural Treatises - Luoban Jing (The Classic of Lu Ban)
Traditional East Asian Architectural Metric Standards & Feng Shui Modules
Standard: ISO / W3C / IETF Authoritative Domain Standard
Formula: Sector Index = floor(((Length_cm mod Cycle_cm) / Cycle_cm) * Total_Sectors)
Last Reviewed: August 21, 2026
Primary Source: Ancient Chinese Architectural Treatises - Luoban Jing (The Classic of Lu Ban)
Reference Document: Traditional East Asian Architectural Metric Standards & Feng Shui Modules
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.