Price the formwork, concrete and reinforcement for a suspended upper-floor slab — BRC mesh or a rebar grid, any thickness — with editable prices.
Looking for an outdoor timber patio deck instead? Use the Timber Deck Calculator.
125mm is typical for a residential suspended slab.
BRC A393 mesh sheets (2.4 × 4.8m), suited to lightly-loaded residential slabs.
per 50kg bag
per tonne
per tonne
per m³
per m², material + labour
per 2.4×4.8m sheet
Enter slab length and width to see quantities and cost.
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Professional Estimator
Ready to take the next step?
A suspended slab needs three things priced together: the formwork (soffit boards and props) that holds the wet concrete in shape until it cures and can carry its own weight, the concrete itself, and the steel reinforcement that gives it tensile strength. Leaving any one of these off a BOQ line is a common way a "decking" allowance comes in far short.
This calculator uses the same 1:2:4 concrete build-up and BRC/rebar conventions as the site's Professional Estimator, so a figure here should track closely with what a full room-by-room estimate would price the same slab at.