How do I calculate concrete for a pier or pad footing?
Multiply length × width × depth in metres, then by how many identical footings you need. A 600 mm × 600 mm × 300 mm pad footing is about 0.11 m³ each.
Order0.0 m³ ready-mix, or 0 x 20 kg bags
Indicative Australian rates: ready-mix $220–$320 per m³, bags $7–$10 each. Actual prices vary by region, supplier and mix specification, so confirm before ordering.
Multiply length × width × depth in metres, then by how many identical footings you need. A 600 mm × 600 mm × 300 mm pad footing is about 0.11 m³ each.
10% is a normal starting point. Use less for tidy formwork and more for rough ground, uneven excavation or over-dig.
Below 0.5 m³, bags usually work out cheaper: you skip the delivery minimums and short-load fees trucks charge. Above 0.5 m³, ready-mix usually wins on price, whether that's a mini-mix truck for tight access and smaller loads or a standard agitator truck for bigger pours.
No. Use SlabSet for estimating, then confirm quantities, grade and reinforcement before ordering.
A pier footing (or pad footing) is the isolated rectangular pad a post, stump or pier sits on, spreading a point load into the ground. Enter the pad length, width and depth in millimetres: a common 600 mm × 600 mm × 300 mm footing is about 0.11 m³.
Deck and verandah posts usually need several identical footings. Set Quantity to the number of pads and SlabSet multiplies the whole order for you.
Estimates only. Confirm quantities and prices with your supplier.
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