Construction Calculators
Plan materials for any build — from concrete and cement to tiles, paint, and roofing — with free, instant construction calculators.
Most Popular Construction Tools
Concrete Calculator
The go-to tool for any pour — work out volume and mix quantities for slabs, footings, and foundations.
Calculate Now →Cement Calculator
Find exactly how many cement bags your slab, wall, or foundation needs based on your mix ratio.
Calculate Now →Sand Calculator
Estimate sand volume and weight for bedding, leveling, or mixing with cement on any project.
Calculate Now →How It Works
Choose a Calculator
Pick the construction tool that matches the material or job you're estimating.
Enter Your Measurements
Fill in dimensions like length, width, and depth — or pick your mix ratio and material type.
Get Instant Results
See exact quantities immediately, with the formula behind every number.
All Construction Calculators
Concrete Calculator
Work out concrete volume and bag quantities for slabs, footings, and foundations.
Calculate Now →Cement Calculator
Calculate how many cement bags you need based on your area and mix ratio.
Calculate Now →Sand Calculator
Estimate sand volume and weight for construction or landscaping projects.
Calculate Now →Gravel Calculator
Find out how much gravel you need for a driveway, path, or drainage layer.
Calculate Now →Asphalt Calculator
Estimate hot mix asphalt tonnage for a driveway, car park, or road surface.
Calculate Now →Brick Calculator
Find how many bricks your wall needs, including mortar joints and wastage.
Calculate Now →Tile Calculator
Work out how many tiles you need for a floor or wall, cuts included.
Calculate Now →Flooring Calculator
Calculate how many packs of laminate, vinyl, or hardwood flooring you need.
Calculate Now →Paint Calculator
Estimate how many litres of paint you need to cover your walls or ceiling.
Calculate Now →Roofing Calculator
Work out roof area, squares, and shingle bundles based on pitch and footprint.
Calculate Now →Why Use Construction Calculators?
Ordering too little material means a delayed job and a second delivery charge; ordering too much wastes money that could go elsewhere in the budget. Our free construction calculators use standard industry formulas and real material densities to give you an accurate quantity before you place an order — whether you're pouring a slab, laying a floor, or planning a full roof replacement.
Pro Tip: Every calculator on this page uses industry-standard formulas and realistic waste allowances specific to each material type — not a generic percentage applied blindly across every project.
Frequently Asked Questions
Yes, every calculator on this page is completely free, with no sign-up or account required.
Each tool uses standard industry formulas and material densities. Results are a reliable estimate for ordering, but always confirm final quantities with your supplier or contractor.
Most calculators let you set your own wastage percentage, since it varies by job complexity, cutting pattern, and site conditions.
Yes, every calculator is fully responsive and works the same way on phones, tablets, and desktop.