Estimate concrete volume in cubic yards and add a configurable waste allowance.
Planning estimate only. Verify dimensions, waste, coverage, product specifications, and local requirements before purchasing materials.
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Cubic feet = length × width × depth in feet. Cubic yards = cubic feet ÷ 27. The waste allowance is then added.
For a 20 ft × 10 ft slab at 4 inches deep, convert depth to 0.333 ft before calculating volume and adding the chosen waste allowance.
One cubic yard contains 27 cubic feet.
Many projects include an allowance for uneven excavation and handling, but the right amount depends on site conditions.
Calculate each rectangular section independently and add the volumes before ordering.
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