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📚 Engineering Guides — Construction Calculators & Formulas

Practical guides that explain “how to calculate” step by step — with formulas, worked examples, and reference tables — each linked to its free calculator for instant verification. The numbers match the calculators exactly.

All guides (12)

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Villa Construction Cost & Price per Square Meter in Saudi Arabia (2026 Guide)
Two estimates in one guide: quick (price/m² × area + 8-item split + contingency) and detailed by quantities (concrete/steel/block).
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How to Build a Professional Construction Quotation (2026 Guide)
Items × quantities × prices → subtotal + profit margin + 15% VAT → a professional client-ready quote.
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How to Calculate Concrete Volume & Materials (2026 Guide)
Pour volume + cement, sand, gravel per m³ + C20–C40 mix ratios + code water/cement.
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How to Calculate Rebar Weight: Steel per Meter & the D²÷162 Formula (2026 Guide)
Weight/m = D²÷162 + the T8–T32 bar weight table + converting bars to tons.
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How to Calculate a Staircase: Steps, Riser, Tread & the Blondel Rule (2026 Guide)
Step count + riser and tread + the Blondel rule 2R+T + slope angle per the SBC/IBC/BS/Eurocode codes.
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How to Calculate Excavation & Backfill: Volumes, Swell & Compaction (2026 Guide)
Excavation = dimensions × depth + 25% swell + backfill by soil type and compaction factor.
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How to Calculate Bitumen Waterproofing for Roofs & Foundations (2026 Guide)
Quantity = area × coats × type rate + 10% waste — for bitumen waterproofing.
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How to Calculate Thermal Insulation: R-value & Thickness by Energy Code (2026 Guide)
R = thickness ÷ λ · U = 1/R + SBC energy-code check + boards count.
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How to Calculate Block Quantity & Mortar for Walls (2026 Guide)
Block count = area ÷ block face + mortar + cement and sand per m² of wall.
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How to Calculate Tiles, Ceramics & Adhesive for Floors (2026 Guide)
Tile count = area ÷ tile area + waste + adhesive, primer, and grout per m².
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How to Calculate Plaster (Rendering): Cement & Sand per Square Meter (2026 Guide)
Mortar volume = area × thickness + waste + cement and sand per m² of plaster.
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How to Calculate Paint & Quantity per Square Meter (2026 Guide)
Paint quantity = area ÷ coverage × coats + waste + putty and primer per room.
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