Concrete slab calculator
Cubic metres, bags and mesh for a slab. Metric, updates as you type. An estimate to plan with and to describe the job — not a cut list or a quote.
100 mm is usual for paths and sheds
Estimate
Slab area12 m²
Concrete100 mm thick1.20 m³
Bags of premixover 1 m³ — order ready-mix from a truck instead, it is cheaper and far less work96 x 25 kg
Reinforcing mesh2.4 x 6 m sheets, 10% for laps1 sheet
Estimated installed costsupply and labour, incl. GST · concrete slab, driveway or patio$1,850–$3,400
Refine this estimate →Assumes 0.0125 m³ per 25 kg bag of premix (0.01 m³ per 20 kg bag); mesh sheets 2.4 x 6 m with 10% for laps; no allowance for uneven base or thickened edges. An estimate for planning and for describing the job, not a cut list or a quote.
What does the whole job cost? See concreting prices in the cost guide.
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