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Thước Lỗ Ban

Thước Lỗ Ban cuộn trực quan tra cứu kích thước phong thủy Thông Thủy (cửa đi, cửa sổ), Dương Trạch (nội thất, bếp) và Âm Phần (bàn thờ).

Lu Ban Feng Shui Ruler

Lu Ban Ruler

Interactive synchronized ruler for Clear Openings (52.2cm), Solid Structures (42.9cm), and Ancestral Altars (38.8cm).

cm
Overall Feng Shui Rating:

Triple Auspicious (3 Red Sectors - Supreme Fortune)

Exceptional dimension! All three rulers (Clearance, Solid, and Altar) fall into Auspicious Red sectors. Highly recommended for all residential and interior projects.

Selected
81 cm
810 mm
Red: Auspicious
Black: Inauspicious
100%
50556065707580859095100105110Prime MinisterBenefactor (Noble)DisasterNatural CalamityHeavenly FortuneBlessings & ProsperitySolitudeTheft & LossPrime MinisterBenefactor (Noble)DisasterSickness (Benh)Separation (Ly)Righteousness (Nghia)Authority (Quan)Robbery (Kiep)Harm (Hai)Origin & Root (Ban)Wealth (Tai)Sickness (Benh)Separation (Ly)Righteousness (Nghia)Authority (Quan)Prosperity (Vuong)Bitterness (Kho)Righteousness (Nghia)Office & Honor (Quan)Death & Ruin (Tu)Ascent (Hung)Loss & Isolation (That)Wealth (Tai)Heir & Descendant (Dinh)Harm (Hai)Prosperity (Vuong)Bitterness (Kho)Righteousness (Nghia)Office & Honor (Quan)Death & Ruin (Tu)Ascent (Hung)Loss & Isolation (That)81 cm
52.2 cm (Clear Opening / Airspace)
42.9 cm (Solid Structure & Furniture)
38.8 cm (Altars & Memorial Items)
52.2 cm • Clear Opening / Airspace

Doors & Windows Opening

RED - LUCKY
Major SectorAuspicious
Blessings & Prosperity(Blessings & Prosperity)

Abundant happiness and wealth, flourishing home, fulfilled lifetime.

Minor SectorRed / Lucky
Precious Gains(Precious Gains)

Acquisition of valuable treasures

42.9 cm • Solid Structure & Furniture

Furniture & Solid Structure

RED - LUCKY
Major SectorAuspicious
Origin & Root (Ban)(Origin & Root (Ban))

Solid foundation, sustained business profits, academic honors for children.

Minor SectorRed / Lucky
Wealth Arrival(Wealth Arrival)

Spontaneous influx of resources

38.8 cm • Altars & Memorial Items

Altars & Memorial Shrines

RED - LUCKY
Major SectorAuspicious
Heir & Descendant (Dinh)(Heir & Descendant (Dinh))

Blessed lineage, male descendants, ancestral favor, exam excellence.

Minor SectorRed / Lucky
Surging Wealth(Surging Wealth)

Surging financial growth

How to Use Lu Ban Ruler

1

Drag Ruler or Enter Dimension

Drag the visual ruler tape, use mouse wheel, or type your desired cm/mm directly into the input field.

2

Inspect 3 Rulers Simultaneously

Check the red center indicator needle to evaluate major and minor sectors across 52.2cm (Openings), 42.9cm (Solid), and 38.8cm (Altars).

3

Apply Curated Presets

Browse the Auspicious Presets library to quickly jump to standard door, window, bed, and altar dimensions.

Key Benefits

  • Synchronized 3-layer traditional Lu Ban ruler tape with smooth responsive interaction
  • Instant Triple-Red (Supreme Luck) and Double-Red sector assessment and recommendations
  • Built-in gold standard architectural presets for main doors, bedrooms, altars, and stairs
  • Runs 100% locally in your browser with zero latency and full offline support

Browser & Hardware Notes

  • Differentiate between clear opening dimension (lọt lòng) and outer frame dimension (phủ bì).

Frequently Asked Questions about Lu Ban Ruler

Always use the 52.2 cm (Clear Opening / Thông Thủy) ruler. Measure strictly the clear space through which light and air pass, excluding the outer door frame.
100% In-Browser Privacy Architecture

How Lu Ban Ruler Operates Privately on Your Device

Unlike traditional cloud services that transmit your confidential files across the open internet to remote servers, SafeWebUtil operates on a strict zero-upload client-side architecture. Every transformation performed by Lu Ban Ruler executes exclusively within your browser's secure memory sandbox.

Deterministic Astronomical Formulas

Calculates solar-lunar ephemeris conversions, solar terms, and lunisolar cycles using pure mathematical algorithms running locally in JavaScript.

Classical Combinatorial Computing

Computes 64 I Ching hexagram permutations, Heavenly Stems & Earthly Branches (Can Chi), and Lu Ban architectural dimensional standards in local client memory.

Zero Personal Query Tracking

Birth details, personal dates, and measurement searches are never stored in cookies, databases, or analytics logs. Complete personal privacy is guaranteed.

Engineering Insights & Performance Best Practices for Lu Ban Ruler

Astronomical solar and lunar algorithms and I Ching permutations execute mathematically in local JavaScript with zero data logging or telemetry.

Read our technical research on why client-side processing is the future of digital privacy

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