Rainwater harvesting calculator

Use this calculator to estimate the amount of rainwater you can collect from the roof of your building and how much you will practically use.

Please note: This rainwater harvesting calculator estimates the amount of rain water collection that can be achieved by Waterscan rainwater harvesting products and rain water collection systems. For a more accurate calculation of the amount of rainwater collection you can expect for your building please contact Waterscan on 01243 839880. Waterscan are harvesting rainwater for leading companies and public authorities throughout the UK so you can be sure we will understand your requirements.