Get precise measurements for concrete slabs, footings, and walls. Calculate cubic yards, concrete bags, and project cost with our free concrete calculator.
Cubic Yards (with Waste)
1.30 cu yd
80lb Bags
59
60lb Bags
78
40lb Bags
117
Estimated Cost
$162.04
For larger projects, consider ordering 5-10% extra concrete to account for spillage, uneven excavation, or last-minute changes.
Concrete estimates usually start with the project area or volume, then add a waste factor before converting the result into bags, pieces, bundles, panels, or gallons. Use this calculator when you need a fast material estimate before ordering supplies, comparing costs, or planning a construction project.
Contractors, builders, remodelers, and DIY homeowners who need a practical jobsite estimate.
Start with the dimensions of the project, then choose material settings, price, and waste percentage.
The basic workflow is to measure dimensions, convert units, calculate volume, then round up so you do not run short during installation.
It takes approximately 45 bags of 80lb concrete to make one cubic yard (27 cubic feet). An 80lb bag yields about 0.6 cubic feet.
Calculate the volume of concrete needed for your project. Multiply the length, width, and thickness (convert inches to feet first) to get cubic feet, then divide by 27 to get cubic yards.
Accurately measure the length, width, and thickness of your concrete project in feet and inches.
Convert all measurements to the same unit (feet for imperial, meters for metric).
Multiply length × width × thickness to get total volume.
Add 5-10% extra for spillage, uneven surfaces, and mistakes.
Divide cubic feet by 27 to get cubic yards, or use bag counts for small projects.
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