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Concrete Calculator – Cubic Yards, Volume & Bags
Calculate concrete volume in cubic feet and cubic yards, add extra material, and estimate bag count using an editable bag yield.
Quick answer
Volume = length × width × thickness. Cubic yards = cubic feet ÷ 27.
A 12 × 10 ft slab at 4 inches thick is 40 cubic feet, or about 1.48 cubic yards before extra material.
Enter values and calculate.