The slab uses 2.4 mΒ³ before waste and 2.52 mΒ³ with the allowance.
Home & Construction calculator
Concrete Volume Calculator
Turn slab dimensions into cubic metres and a practical order quantity.
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No account. Formula and assumptions are shown below.
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Concrete volume details
Formula & disclaimer
Concrete Volume = Length Γ Width Γ Thickness in Metres Γ Number of Slabs; Order Volume = Volume Γ (1 + Waste Allowance)
View assumptionsFormula reviewCalcs at Hand Editorial TeamVerified 28 August 2026 Β· automated checks included
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How to read this result
Three useful checks, kept deliberately short.
A 6 m Γ 4 m slab, 10 cm thick, with 5% waste: Convert 10 cm to 0.10 m Β· Multiply length Γ width Γ thickness Β· Add the waste allowance.
Footings, beams, uneven ground, reinforcement displacement and supplier minimum orders must be considered separately.
Formula and assumptions
Concrete Volume = Length Γ Width Γ Thickness in Metres Γ Number of Slabs; Order Volume = Volume Γ (1 + Waste Allowance)The calculation assumes a rectangular slab with a consistent thickness.
Keep in mind: This is a material-planning estimate. Confirm dimensions, structural requirements and order quantities with the contractor or supplier.
Produced byCalcs at Hand Editorial Team
Last formula check28 August 2026
Review methodKnown examples + boundary cases
Editorial and correction policy β