Net volume
Rectangular work uses length × width × depth. Circular columns use π × radius² × height, multiplied by quantity.
Field tool / Concrete
Measure first. Order clearly.
A practical concrete volume estimator for slabs, footings, walls and circular columns, with waste allowance, mass estimate and optional material cost.
Units supported
Metric + Imperial
Live calculation.
Concrete quantity estimator
Useful on site. Transparent in method.
Enter the finished dimensions, choose a waste allowance and get a ready-mix volume in both cubic metres and cubic yards. The result updates as you type.
How it works
Simple geometry. Visible assumptions.
Allowance
The selected contingency is added after geometric volume, so the net quantity and allowance remain separately visible.
Mass estimate
The default density is 2400 kg/m³ and remains editable because concrete density varies by mix and aggregate.
Reference conversions. NIST lists 1 cubic yard as 0.764554857984 m³. NRMCA describes normal-weight concrete in the approximate range 2240–2400 kg/m³ (140–150 lb/ft³). This calculator uses 2400 kg/m³ only as an editable default for mass estimation.
From estimate to delivery
Need the construction team behind the numbers?
Use the calculator for early quantity checks, then bring us the drawings, constraints and delivery brief.
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