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Concrete Volume Calculator

Estimate concrete volume for slabs, footings, pads, and other rectangular placements.

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Screen shallow foundation bearing capacity using a Terzaghi-style calculation.

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Estimate active, at-rest, or passive lateral earth pressure for simple drained backfill cases.

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Screen shallow translational slope stability with an infinite slope model.

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Estimate active retaining wall pressure, surcharge contribution, and drainage sensitivity.

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Calculate open-channel velocity and discharge from area, hydraulic radius, slope, and Manning roughness.

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Screen a preliminary USCS soil group using gradation percentages and Atterberg limits.

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Convert common soil and material density or unit weight values between pcf, kN/m3, and kg/m3.

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CBR test explained for pavement subgrade and base support evaluation.

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Compaction testing explained for field density, moisture control, and earthwork quality.

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Concrete volume calculation explained for slabs, footings, and rectangular placements.

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Culvert sizing basics, including inlet control, outlet control, slope, tailwater, and debris.

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How to estimate concrete for a slab with thickness, waste factor, and field tolerance checks.

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Manning's equation explained for open channel flow, velocity, discharge, roughness, and slope.

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Open channel flow basics for civil drainage design and field review.

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Proctor test explained, including maximum dry density, optimum moisture, and field compaction control.