Free tool · runs in your browser
Concrete Volume Calculator
Calculate concrete volume in cubic yards from length, width, and depth — with waste percentage and 60 lb / 80 lb bag equivalents. Free, runs in your browser.
No signup · nothing uploaded · Free — unlimited use, runs entirely in your browser
How it works
Enter length, width, and depth
Feet and inches for length and width; inches for depth/thickness.
Set waste percentage
10% is the common allowance for spillage and uneven subgrade.
Read cubic yards
Net volume, volume with waste, and bag-count equivalents.
Enter the slab or footing dimensions in feet and inches and get the volume in cubic feet and cubic yards — the units concrete is actually ordered in. Add a waste/overage percentage (10% is standard practice for most pours) and see the equivalent in 60 lb and 80 lb bag counts for smaller jobs.
For takeoff work, this is the CY step of an area-times-depth measurement — the same operation PDFDepth's volume takeoff performs directly on the drawing.
Questions, answered
27 — a cubic yard is 3 ft × 3 ft × 3 ft. Concrete is ordered by the cubic yard (often rounded to the nearest quarter or half yard by suppliers).
More free tools
Need more than the free limit?
PDFDepth's volume takeoff measures the area on the drawing and applies the depth automatically — CY straight off the sheet, exported to Excel.
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