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Mark Stevens, PE
Verified by Mark Stevens, PEPE, MS in Structural Engineering

Senior Civil Engineer

Concrete Calculator

Estimate the total volume of concrete needed for slabs, footings, and walls. Provides precision volume in cubic yards or cubic meters to prevent over-ordering.

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Density Constants

Concrete150 lb/ft³
Mortar135 lb/ft³
Cement94 lb/ft³

Standard Bag Yields

80lb Bag0.60 ft³
60lb Bag0.45 ft³
40lb Bag0.30 ft³

*Approximate yield after water addition.

Water Ratio Tip

Always start with 3/4 of targeted water. Excess water significantly reduces structural PSI.

Adding a 10% waste factor is industry standard to account for spills, uneven forms, and consolidation.

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Calculation Logic

Volume=Length×Width×Thickness\text{Volume} = \text{Length} \times \text{Width} \times \text{Thickness}

Frequently Asked Questions

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Mark Stevens, PE

About the Expert: Mark Stevens, PE

Senior Civil Engineer (PE, MS in Structural Engineering)

Mark Stevens is a licensed Professional Engineer with over 20 years of experience in structural design and construction management. He specializes in masonry standards and concrete engineering.

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