Concrete Calculator
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Free concrete calculator for slabs, footings and round columns: get the volume in cubic yards and cubic meters plus how many 40, 60, 80 lb or 25 kg bags to buy. Web page: https://calcbright.com/concrete-calculator
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| qty | No | Quantity | |
| unit | No | Units | imperial |
| depth | No | Thickness (in) | |
| shape | No | Shape | slab |
| waste | No | Extra for waste / spillage (%) Many contractors add 5–10%. | |
| width | No | Width (ft) | |
| height | No | Height / depth (ft) | |
| length | No | Length (ft) | |
| diameter | No | Diameter (in) |