Texas Rainwater Calculator
What's Your Rainwater Harvesting Potential
Use localized rainfall history to estimate capture and find a tank size that fits your demands.
Free to use. Built from Texas rainfall records.
Get started in 3 simple steps
Enter a few property details to estimate capture and get a practical starting point for system sizing.
Find Your Location
Enter your address or select your property on the map.
Enter Property Details
Add roof area and a few details about how you plan to use the water.
Review Your Results
Review estimated capture, tank sizing, and simulation-based guidance.
Live outside of Texas or have your own data?
Use the custom rainfall calculator to upload your own rainfall records or enter monthly values by hand for projects outside the Texas coverage area.
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.