Rainwater harvesting calculator Rainwater harvesting calculator

Rainwater harvesting calculator

Estimate annual roof collection, demand coverage, tank size, mains-water saving and potential overflow.

Calculator settings

Result

Annual Harvest
66,300 l
Demand Coverage
100 %
Recommended Tank
3,780 l
Selected Tank
5,000 l
Annual Mains Saving
65.7 m³
Potential Overflow
600 l

Rainwater harvesting calculator online

Estimate annual roof collection, demand coverage, tank size, mains-water saving and potential overflow.

The result is an engineering or planning estimate. Verify critical dimensions, prices, limits and safety requirements before making a final decision.

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