Measure the length, width, and thickness of the concrete area
Convert all measurements to the same unit
Multiply length × width × thickness to get volume
For slabs, use thickness in feet or meters to match the other dimensions
For footings or beams, calculate each section separately and add them together
Add 5% to 10% extra for waste and spillage
Convert the final volume to cubic yards, cubic feet, or cubic meters as needed
Use the formula: Volume = Length × Width × Thickness
Use the formula: Cubic yards = Cubic feet ÷ 27
Use the formula: Cubic meters = Length × Width × Thickness in meters
For multiple areas, calculate each area separately and total them
For irregular shapes, divide the area into simple shapes and calculate each one
For columns, use: Volume = Cross-sectional area × Height
For cylindrical shapes, use: Volume = π × radius² × height