Cement Calculator

Your details

Choose the shape that matches your pour.
All dimension inputs use this unit.
The longest dimension of the slab.
ft
The shorter dimension of the slab.
ft
Typical residential slabs are 4 inches thick; driveways 5-6 inches.
ft
Use this to multiply: e.g. 6 fence-post columns at the same size.
Add extra for spillage, uneven sub-base and leftover in the mixer. 10% is the industry standard.
Bag yield varies slightly by brand; these are manufacturer averages.
Leave at 0 to skip cost. Ready-mix typically runs $125-$200 per cubic yard depending on region.
USD
Cubic yards
19.56yd³

Volume in cubic yards - the standard unit for ready-mix ordering

Volume528ft³
Cubic metres14.951m³
Bags needed880bags
Concrete weight79,200lb
Estimated cost0USD
ft³528
yd³19.56
m³14.951

You need 19.56 yd³ of concrete (880 bags).

  • Your slab requires 19.56 cubic yards (528.0 ft³) of concrete including the waste allowance.
  • That is 880 premix bags at the selected bag size; always round up to avoid a short pour.
  • Over 3 cubic yards: ordering ready-mix concrete delivered by truck is usually faster and cheaper per yard than bagged mix.

Next stepConfirm slab thickness and sub-base preparation before ordering. For structural pours, ask your supplier about the correct concrete mix design (e.g. 3000 psi vs 4000 psi).

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