ToolsProfessional Tool
Concrete Calculator
Volume, ready-mix order size, truck loads, bagged materials and reinforcement mesh for slabs, footings and post holes — with selectable mix strength.
C20–C35 mix guide rates
paths, shed bases
Volume required (incl. 10% waste) · C20
1.32 m³
Ready-mix: 1.35 m³ (1 × 6m³ truck)Approx. weight 3.2 t
Mixing it yourself? (C20 guide)
Cement, 25kg bags (300kg/m³)16
All-in ballast2.5 t
Ballast bulk bags (~850kg)3
Guide only. Confirm mix strength and reinforcement with your structural engineer. Need foundation drawings? Request a free quote.
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