Concrete cost estimator

Concrete Cost Estimator — Ready-Mix vs Bags (2026)

How much does a slab of concrete cost? Compares ready-mix $/cubic yard against 80 lb / 60 lb bag price for the same pour, then picks the cheaper option. Includes waste-rounded yardage and bag counts per job.

Inputs
Slab dimensions
ft
ft
ft
%

Pricing

$/yd³
$/ea
$/ea
Cost comparison

Ready-mix cost

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Bag cost (total)

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80 lb bag count

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60 lb bag count

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Enter at least one price below

Assumptions

  • Including 10% waste on bag order (ready-mix orders round up to 0.25 yd).
  • Yield per bag: 80 lb = 0.6 cu ft, 60 lb = 0.45 cu ft.
  • 1 cubic yard = 27 cubic feet.
  • Bag math: ceil(cuFt × (1 + waste) / bag-yield). Ready-mix math: ceil(cuYd × (1 + waste) × 4) / 4 yd.
  • Ready-mix cost: enter /yd³ price to enable comparison.

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