Concrete Calculator
Work out concrete volume for slabs, footings, columns, and cylindrical structures in cubic metres or cubic yards, with an optional waste allowance.
Use This Tool → Our Services
Calculators Built for Real Construction Work
Every CAL estimate tool is free, works in metric and imperial units, and shows the formula behind the result so you can check the numbers before you order materials.
What We Offer
Six core service areas covering material estimation, cost planning, and day-to-day engineering calculations.
Brick Calculator
Estimate the number of bricks or blocks required for a wall using wall dimensions, brick size, mortar joint thickness, and deductions for openings.
Use This Tool →Construction Cost Estimator
Build a project budget from material costs, labour, delivery, equipment hire, and a contingency allowance — in your own currency.
Use This Tool →Material Quantity Take-Off
Calculate cement, sand, aggregate, steel, plaster, paint, tiles, and screed quantities from areas, volumes, and standard mix ratios.
Use This Tool →Unit Converter for Site Work
Convert between metric and imperial units — metres and feet, square metres and square feet, cubic metres and cubic yards, kilograms and pounds.
Use This Tool →Everyday Engineering Calculators
Solve common civil engineering problems: beam loads, slope and gradient, earthwork cut and fill, rebar weight, and water tank capacity.
Use This Tool →Estimating Support Beyond the Calculators
Most people only need our free online tools. If your project is larger or more complex, we also prepare detailed take-offs and reviewed estimates on request.
Detailed Quantity Take-Offs
Send us your drawings and we return an itemised schedule of concrete, reinforcement, masonry, finishes, and formwork quantities ready for pricing or tendering.
Budget and Cost Planning
We help homeowners and small contractors turn quantities into a realistic budget, with allowances for labour, delivery, wastage, preliminaries, and contingency.
Calculation Reviews for Students and Professionals
Submit your working for a second pair of eyes. We check units, assumptions, mix ratios, and formulas, and explain exactly where a calculation went off track.
Custom Calculators
Need a spreadsheet or web calculator for a repeating in-house task? We can build a simple, clearly documented tool to your own formulas and unit preferences.
Areas We Serve
CAL estimate calculators are used by homeowners, builders, and engineers across the world, with metric and imperial units for every region.
WorldwideGlobal AudienceUnited StatesUnited KingdomAustraliaCanadaNew ZealandEuropeAsiaMiddle EastAfrica
Not Sure Which Tool You Need?
Tell us about your project and we'll point you to the right calculator — or prepare the estimate for you.
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