MEASURE BEFORE YOU PLAN
Concrete volume calculator
A practical starting point for rectangular flatwork. Enter dimensions to estimate surface area and material volume.
This tool calculates volume only. It does not specify the right slab thickness, reinforcement, or concrete mix for your use.
YOUR PLANNING QUANTITIES400square feet
Net volume4.94 cu yd
With 10% allowance5.43 cu yd
Volume = length × width × thickness (inches) ÷ 324. Allowance is optional; final ordering quantities require site verification.
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