Calculate Your RainwaterHarvesting Potential in Texas
Built for the Lone Star State. Uses location‑specific historical rainfall to estimate capture and recommend a tank size tailored to your needs.
Why This Calculator is Different
Most rainwater calculators rely on city or county averages, or require you to hunt down rainfall tables and build your own spreadsheet. This tool makes trusted, location specific rainfall data easy to use: we do the heavy lifting and turn decades of monthly history into capture estimates, tank sizing, and a tank simulation you can explore month by month.
Local grid rainfall data
Uses a small grid near your property, not generalized city or county averages.
No spreadsheets required
We combine the data and the math so you can get results in seconds, not hours.
Unique tank simulation
See month‑by‑month tank levels and reliability using the historical record at your location.
Get Started in 3 Simple Steps
Enter your home's details below to estimate how much rainwater you can collect and use.
Find Your Location
Enter your address or select your property on the map
Enter Property Details
Provide roof area and other basic information about your home
Get Your Results
View personalized estimates and system recommendations
Location
Find your property
Property Details
Enter home information
Results
View your analysis
Find Your Location
Enter your address or click on the map to select your property and get location-specific rainfall data.