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Septic Tank Size Calculator

Enter the number of users to estimate the tank volume for one day of retention plus sludge storage.

Enter your details

litres

SARZAMEEN Tools | Septic Tank Size Calculator

Estimate generated 19 Oct 2026 | https://property.candletrack.pro/public/buildcraft/tool/septic-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

    • Volume = one day of wastewater plus sludge storage at 0.04 m³ per person per year.
    • The plan uses a 2:1 length-to-width shape.

    Frequently asked questions

    No. Authorities may require specific tank designs and distances from wells and boundaries.

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