RainwaterToPL
Rainwater planning

Rainwater tank calculator

Calculate annual roof yield, demand coverage, overflow and shortfall with a monthly storage balance.

Monthly balance

Enter values or load the example. Everything is calculated locally.

Source: IMGW 1991–2020. You can edit every value.
Monthly rainfall [mm] — editable

Result

The result appears after calculation.
This is a concept calculation. Confirm local rules, water quality, hydraulic sizing and manufacturer instructions.