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Concrete calculators for the field
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Slab calculator
For driveways, patios, garage floors, slabs-on-grade.
Volume (yd³) = (Length × Width × Thickness in ft) ÷ 27
Most suppliers recommend 5–15% extra.
Your local concrete cost per yard.
Volume needed
Total yards3.91 yd³
Without waste3.56 yd³
Cubic feet96.0 ft³
If using bags
80 lb bags160
Surface area288 sqft
Estimated cost
Concrete material$645
Doesn't includelabor, prep, rebar
Disclaimer. Calculator results are educational estimates only. Material volumes assume ordinary concrete and do not account for ground conditions, reinforcement, formwork, or labor. Always confirm quantities with your supplier before pouring.
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