CALCULATOR
Harvested Rainwater from Supplied Efficiency Calculator
Harvested Rainwater from Supplied Efficiency Calculator — change the supplied values to calculate harvested rainwater from supplied efficiency.
No first-flush, evaporation, tank overflow, water-quality or roof-safety model. All monetary inputs use one selected currency with no currency conversion. Numerical binary64 projection.
Accepted inputs: Catchment horizontal area: 0 to 1,000 m²; Rain depth: 0 to 1,000 mm; Chosen collection efficiency: 0 to 1 ratio.
How the calculation works
area*(rain*efficiency)
One millimetre over one square metre is one litre; apply supplied collection fraction.
Worked example
With catchment horizontal area 50 m², rain depth 20 mm, chosen collection efficiency 0.8 ratio, harvested rainwater from supplied efficiency is 800 L.
Assumptions and limits
No first-flush, evaporation, tank overflow, water-quality or roof-safety model. All monetary inputs use one selected currency with no currency conversion. Numerical binary64 projection.