Rectangular Tank Capacity Calculator

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Calculate rectangular tank volume and water capacity.

Water & TanksWorking calculatorMobile friendly

Rectangular Tank Capacity CalculatorVisual reference for this tool.

Use this calculator for quick estimating and planning. Verify project-specific assumptions before final procurement or design.

Length (m)

Width (m)

Water Depth (m)

Freeboard (m)

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Calculations run locally in your browser; no backend is required.

Capacity = Length × Width × Water Depth × 1000 litres/m³

A 3 × 2 × 1.8 m tank holds about 10,800 litres.

For structural, electrical, code-compliance or safety-critical work, use this as a preliminary estimate and verify with a qualified professional.

Short answers for common estimation questions.

They are estimation values. Site conditions, product specifications and local practice can change final quantities.

Yes. Civil Micros is designed to work on mobile browsers without a backend.

Continue your calculation workflow.