Concrete construction / US units
Calculate how much
concrete you need.
Enter your project measurements to estimate concrete volume, bags of mix, and other materials. Each calculator explains which dimensions to use and what the result includes.
01 / Concrete volume
What are you measuring?
For a rectangular slab, patio, or footing, multiply length by width and thickness. Choose a different calculator for round forms, hollow sections, or solid steps.
Estimate the concrete for a rectangular slab, wall, footing, or column using its length, width, and thickness.
Round concrete volumeCalculate concrete for a round column or form using its inside diameter and height.
Hollow cylinder volumeCalculate concrete between a round outer form and a round post or opening. Both circles must share the same center and fill height.
Solid concrete stepsCalculate concrete for solid steps with equal tread depths and riser heights, built on a flat base.
02 / Material quantities
Estimate materials for your project
Convert concrete volume to bags using the yield printed on your product. You can also estimate material weight, mesh sheets, and liquid product quantities from stated coverage.
Calculate how many bags of concrete mix you need using your required volume and the mixed yield per bag.
Concrete and aggregate weightConvert concrete or aggregate volume to weight using the density of your material.
Wire mesh sheetsEstimate full mesh sheets needed to cover a rectangular area, including the overlap required by your project.
Liquid product coverageEstimate liquid quantity from the treated area, the exact product’s coverage per application, and the number of equal-rate applications.
03 / Estimating guides
Check your measurements and units
Learn the difference between cement and concrete, convert measurements correctly, and round material quantities before ordering.
Measurements
Measure inside the forms
Use the dimensions of the space that concrete will fill. Calculate that volume before adding any extra material for waste or uneven surfaces.
Browse the guides ↗Calculations
Understand your estimate
Read the formula and the notes listed with each calculator. Check whether the result includes all the parts of your project.
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Concrete quantity tools