Calculate concrete volume and the cement, sand, gravel or bags required.
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Category
Construction & renovation
Plan your building and renovation work with quantity calculators that turn measurements into real material needs: concrete, mortar, blocks, bricks, tiles, paint, plasterboard, insulation, roofing, decking, fencing, stairs, gravel and more.
23 tools available · 6 subcategories · 23 embeddable widgets
All toolsConcrete & masonry 5
Calculate concrete, block, and masonry material quantities.
Calculate concrete blocks, pallets and mortar bags for a wall.
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Estimate bricks, joints, wall volume and mortar.
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Estimate mortar volume and bags for a brick or block wall.
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Estimate bar counts, linear length, and weight for a reinforcement grid.
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Floors & coverings 5
Calculate quantities for tiles, parquet, laminate, and other floor coverings.
Calculate tiles, boxes and quantities to order.
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Calculate packs, underlay, surplus and skirting boards for your floor.
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Estimate decking boards, joists, fixings and waste.
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Calculate screed volume, dry mix, cement, sand and bags.
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Calculate sloped roof area and the number of tiles required.
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Paint & decoration 3
Estimate paint, wallpaper, and interior decoration needs.
Calculate paintable area, litres required and paint containers to buy.
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Calculate drops and rolls from dimensions and pattern repeat.
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Calculate render kilograms and bags from area, thickness and consumption per mm.
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Partitions & insulation 2
Estimate plasterboard, framing, and insulation materials.
Calculate plasterboards, tracks, studs and screws for a partition or ceiling.
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Calculate area, volume, packs and thermal resistance R of insulation.
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Timber & framing 2
Estimate studs, rafters, and timber quantities for common framing projects.
Estimate studs, plates, and timber length for a framed wall.
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Calculate rafter length, count, and total timber for a simple gable roof.
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Landscaping & levels 6
Calculate gravel, slopes, levels, and outdoor project needs.
Calculate gravel volume, weight, bags or bulk bags to buy.
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Convert slope between percent, degrees, rise, length and ratio.
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Calculate steps, riser height, going, angle and the Blondel formula.
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Calculate fence panels, posts and footing concrete.
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Calculate pavers, packs, joints and bedding volume.
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Estimate asphalt volume, tonnage, and truckloads for a rectangular area.
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Why this category?
Why use construction & renovation tools?
Construction projects repeatedly raise the same purchasing questions: how much material is required, what allowance is sensible, how many complete packs must be ordered and what surplus will remain. This category brings those calculations together in consistent tools that keep every assumption visible and editable.
The Construction calculators use dedicated shared engines for geometry, surfaces, volumes, allowances, packaging and purchasable quantities. Technical defaults such as density, coverage, lambda, consumption or spacing can be replaced with the values supplied by the manufacturer, merchant or project specification.
Use cases
Prepare a material order
Convert measured areas and volumes into bags, packs, pallets, rolls, bulk bags or other purchasable units before visiting a merchant.
Control allowances and surplus
Apply cutting, breakage, compaction or site allowances explicitly and see the difference between theoretical need and material actually purchased.
Compare project scenarios
Change dimensions, formats, coverage, density, thickness or packaging and immediately compare how each assumption affects the order.
All these tools are also available as widgets
Add tools from this category to WordPress, Webflow, Wix, or any HTML page with the same local processing.
Frequently asked questions
Are the calculated quantities exact for every construction project?
No. They are estimates based on the values entered. Real losses, substrates, installation methods, product packaging and site conditions can change the final requirement.
Should I use the default density, coverage or consumption values?
They are useful starting points, but the manufacturer or supplier value should be used whenever the exact product provides one.
Do these calculators replace structural or regulatory design?
No. They calculate quantities, surfaces, volumes and geometric relationships. They do not replace structural studies, regulations, technical standards or professional specifications.
Are the calculations performed locally?
Yes. The calculators in this category perform their calculations directly in your browser and do not need to upload your project measurements to a server.
Why are bags, packs or rolls rounded upward?
Construction materials are normally sold in complete packaging units. The calculator therefore rounds to the next purchasable unit and shows the resulting surplus when relevant.