Tank Sizing Calculator
This simple tank calculator will help you determine how much rain you can capture in a year.
It is one of the factors in determing your tank size. This calculator helps you understand how much you can capture in a year (i.e. supply). Besides capture, you will need to determine how much water you need (i.e. demand).
Or you can let me do the calculations for you. You get a full report of supply, demand and recommended tank size. click here.
Let me do a customized report for you.
Enter the below data in the either inches for gallons or meters for litres.
- Enter in Feet, then Gallons is calculated .
- Enter in Meters, then Liters is calculated
Annual Maximum Rainfall (Supply) That Can Be Harvested
Annual Rainfall x Roof Size x .623
Above converts Gallons to Liters after size is calculated.
This calculator helps with what size a tank based on annual rainfall. To find out how big a tank has to be to hold the amount of rainwater you need click here.