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    Area & Drawings

    Rectangular Tank Capacity Calculator

    Calculate a rectangular tank's total capacity and liquid level volume. Use inside dimensions. Nominal outside dimensions can overstate the usable tank capacity. This browser-local calculator updates from numeric inputs and shows a labelled breakdown without uploading your data.

    MAKE IT SIMPLE
    Calculation assumptions

    Use inside dimensions. Nominal outside dimensions can overstate the usable tank capacity.

    Result

    Worked examples

    Inside length (m) 3 · Inside width (m) 2 · Inside height (m) 1.5 · Water height (m) 1.2

    First calculated quantity: 9.00000 m³

    Calculate a rectangular tank's total capacity and liquid level volume. Use inside dimensions. Nominal outside dimensions can overstate the usable tank capacity.

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