Concrete Calculator Concrete Calculator Calculate the amount of concrete needed for slabs, footings, or columns. Measurement Units: Feet Inches Length: Width: Depth/Thickness: Inches Feet Note: When using Feet for Length/Width, Depth is typically measured in Inches. Optional: Calculate pre-mix bags needed. Bag Weight (lbs): 40 lbs 50 lbs 60 lbs 80 lbs 90 lbs Custom Bag Yield (cubic feet): 40 lbs ≈ 0.30 cu ft 50 lbs ≈ 0.375 cu ft 60 lbs ≈ 0.45 cu ft 80 lbs ≈ 0.60 cu ft 90 lbs ≈ 0.67 cu ft Custom Yield Calculate
