Estimate the total cost of concrete for a slab, footing or footpath from the volume and your price per cubic yard or metre.
Ready-mix is usually sold per cubic metre (or cubic yard) with a minimum load charge, so always round up and check your supplier's minimum order.
For anything above roughly 1 cubic metre, ready-mix delivered by the cubic metre (or yard) is usually cheaper and far less labour than mixing bags by hand. For small jobs, bagged concrete can work out more convenient.
A 5–10% allowance is sensible for most pours to cover spillage, an uneven sub-base and slight over-digging. Tight formwork on a level base needs less; rough ground needs more.
Not always. Many suppliers quote a base price per cubic metre plus delivery, a part-load surcharge and sometimes pump hire. Always confirm what is included before ordering.
Paths and shed bases are often C20, general slabs and footings C25–C30, and structural or heavy-duty work C35+. Higher strengths cost more per cubic metre.
Multiply the volume needed (in cubic yards or metres) by your supplier price per unit, then add waste. The calculator does this and lets you choose your currency.
Calculate how much concrete you need for slabs, footings, columns and walls in cubic yards or metres.
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