The NRRTanks Water Tank Chooser provides a practical starting point for selecting a rainwater tank for an Australian home, farm or business.
The calculator estimates daily water use, yearly harvestable roof water and the minimum tank capacity needed for your selected no-rain period. It then shows tanks that meet or exceed that capacity. Use the result as a guide, then consider site access, available space, plumbing requirements and your intended water use before ordering.
Important: This calculator provides a planning estimate using the information entered and long-term rainfall data. It is not a site inspection, engineering assessment or guarantee of water supply. Contact NRRTanks for advice tailored to your property.