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Global construction tools

Construction & Civil Engineering Calculators

Plan, estimate and check common construction calculations with transparent formulas, practical assumptions and global units.

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20+Calculator tools
GlobalMetric + imperial friendly
FreeNo sign-up required
ClearFormulas & assumptions

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Choose an area of construction work to continue.

🏗 EstimationCost, materials and excavation. 🧱 MaterialsConcrete, cement, brick, mortar and plaster. ⚙️ Steel & layoutSteel weight, rebar spacing and staircase geometry. 🎨 FinishingPaint and tile planning. 📐 GeometryArea, volume, wall area and roof pitch. 💧 WaterTank capacity and water-volume calculations. ↔️ ConvertersLength, area, volume, mass and pressure. 📚 GuidesFormulas and practical explanations.
Why 5iBuild

Calculators that explain the number

Clear inputs, assumptions and links to related tools.

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Visible assumptions

Planning factors and limitations are displayed instead of hidden.

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Global-friendly units

SI by default, with common imperial measurements where useful.

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Clear limitations

Preliminary estimates are labeled so they are not confused with professional design.

Construction calculations for real-world planning

5iBuild brings common building calculations into one place: cost planning, concrete volume, masonry, finishing, steel weight, site quantities, geometry and unit conversion. The goal is to make repetitive preliminary calculations faster and easier to check.

For project decisions, use project-specific drawings, specifications, product data and local rates whenever they are available. Where a generic assumption is used, the calculator tells you what that assumption is.

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Important: Results are indicative. Verify specifications, drawings, local rates, product instructions and applicable regulations before ordering or construction.