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    Construction & Electrical

    Concrete Slab Volume Calculator

    Calculate slab concrete volume from length, width, thickness and floor openings. Subtract openings before multiplying by thickness; waste, reinforcement and supplier ordering are separate. This browser-local calculator updates from numeric inputs and shows a labelled breakdown without uploading your data.

    MAKE IT SIMPLE
    Calculation assumptions

    Subtract openings before multiplying by thickness; waste, reinforcement and supplier ordering are separate.

    Result

    Worked examples

    Slab length (m) 10 · Slab width (m) 6 · Thickness (cm) 15 · Opening area (m²) 0

    First calculated quantity: 60.0000 m²

    Calculate slab concrete volume from length, width, thickness and floor openings. Subtract openings before multiplying by thickness; waste, reinforcement and supplier ordering are separate.

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