FAQ
Answers to the most common questions about the calculator and rainwater harvesting.
How much rainwater can I collect?
RainTact calculates it from the precipitation data for your location, your roof area in square feet and your roof material, and shows the result in gallons per year and per month.
Do I need to create an account?
No. You can buy a single report without an account. To buy report packages you need to create an account.
What does the rainwater report contain?
You get your annual result, month-by-month results, charts, roof information and clear comparisons.
How quickly do I get my report?
The report is generated automatically and becomes available immediately.
Can I calculate rainwater for any location?
Yes. Enter an address or coordinates for the location you want to calculate.