Calculate concrete volume and bags for any project.
This tool calculates concrete volume in cubic feet and cubic yards. It also estimates the number of 80lb bags needed, including a waste allowance. For slabs, use depth (e.g., 4 inches = 0.33 ft). For footings and columns, use height as depth.
An 80lb bag yields about 0.6 cubic feet. This calculator uses that standard to estimate bag count.
Yes. A 5-10% waste allowance is standard to account for spillage and uneven subgrades.