Work out ready-mix volume or how many bags of pre-mixed concrete to buy for a slab, path or base.
Questions
How deep should a patio slab be?
About 10 cm (4 in) for foot traffic, 15 cm (6 in) or more for driveways.
Concrete Calculator
Calculate how much concrete a slab, footing or patio needs in cubic metres and yards, and how many bags to buy.