Disclaimer

Estimates for planning only

TrueSquare calculators produce estimates from the values you enter and the assumptions shown on each page. Real projects vary: ground is uneven, products differ, cuts produce waste and measurements contain errors. Always check results, round sensibly, and confirm quantities with your supplier before buying.

Not engineering or building advice

Results do not determine whether a slab, footing, driveway, roof or other structure is adequate. Structural sizing, reinforcement, drainage, ventilation, fire safety and similar matters depend on loads, soils, climate and local regulations — for example the International Residential and Building Codes in much of the US, the Building Regulations in England and Wales, the National Building Code of Canada and provincial codes, and the National Construction Code in Australia. Consult a qualified professional and your local building authority, and obtain any permits required.

Product data

Bag yields, densities, coverage rates and similar values shown as defaults are typical figures, not specifications for any particular product. Where the manufacturer publishes a figure, use theirs.

Prices and currencies

Any cost shown is calculated from prices you enter. We do not provide or guarantee material prices, which vary by country, region, supplier and time.

Safety

Construction work involves hazards such as cement burns, silica dust, heavy lifting, power tools and working at height. Follow manufacturers' safety instructions and the guidance of your national health and safety regulator.