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    Construction & Electrical

    Rainwater Harvest Estimator

    Rainwater Harvest Estimator performs a browser-local calculation using measurements and quantities you control. The results are presented as labelled figures so each number is easy to interpret. Excludes first-flush, storage overflow, contamination and timing of rainfall.

    MAKE IT SIMPLE
    Formula assumptions and scope

    Excludes first-flush, storage overflow, contamination and timing of rainfall.

    Result

    Worked examples

    Catchment area (m²): 100, Rainfall (mm): 20, Runoff coefficient: 0.85

    Rainfall volume: 2,000 L

    Using these sample input values gives the first labelled output above. Excludes first-flush, storage overflow, contamination and timing of rainfall.

    Questions & answers

    Can I use the default numbers for purchasing or safety certification?

    No. Replace the examples with your real values. Excludes first-flush, storage overflow, contamination and timing of rainfall.

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