Toolyard

Concrete Calculator

How to work out how much concrete you need

  1. Choose a slab or footing, or a round column, and metres or feet.
  2. Enter the dimensions and how many you need.
  3. Keep 10% extra for waste or change it, and read the volume and number of bags.

Frequently asked questions

How many bags make a cubic yard?

About 45 bags of 80 lb or 60 bags of 60 lb. An 80 lb bag makes about 0.6 ft³ of concrete.

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