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Water Tank Size Calculator

Enter how many people live in the building and how many days of water you want stored.

Enter your details

litres
About 135 litres is a common planning value for homes.

SARZAMEEN Tools | Water Tank Size Calculator

Estimate generated 19 Oct 2026 | https://www.property.candletrack.pro/public/buildcraft/tool/water-tank-size-calculator

Results

Enter your values and press Calculate. Results will appear here and update as you change inputs.

    Planning aid only. It does not replace the judgement of a licensed engineer, architect or electrician. Confirm with a professional before work starts.

    How this calculator works

    • Tank = people × litres per person × storage days.
    • Plan size uses a 3:2 length-to-width shape at your chosen depth.

    Frequently asked questions

    One US gallon is 3.785 litres.

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