Calculation

calculate your tank size
Region you live in:
Roof surface (M2):
Rain Gauge
(water recovered per year)

USAge
Number of persons:
Watering area (M2):
Number of vehicles:

results (liters per year)
Vehicle consumption:
toilet consumption:
Washing machine consumption:
watering consumption:

TOTAL CONSUMPTION (liter per year)
Total:

*tank capacity (Liters)
Total:

* Estimate / 1000 litres. For sloping roofs and shingles. If your roof is made of sheet metal, flat or covered with a membrane, it will recover a greater volume of rainwater.