Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Environment
Rainwater Harvesting Calculator
Estimate how many gallons of rainwater your roof can collect each year and size your storage tank accordingly. Ideal for homeowners planning irrigation systems, off-grid setups, or drought resilience.
Fill in the required fields to see your result.
Environment
Rainwater Harvesting Calculator
Estimate how many gallons of rainwater you can collect annually from your roof based on roof area, local annual rainfall, and system collection efficiency. Perfect for homeowners planning rainwater harvesting systems for irrigation or non-potable uses.
Fill in the required fields to see your result.
Key differences
| Rainwater Harvesting Calculator | Rainwater Harvesting Calculator | |
|---|---|---|
| Category | Environment | Environment |
| Inputs required | 4 | 3 |
| Result | Required Storage Capacity (gallons) | Annual Water Collection (gallons) |
| What it does | Estimate how many gallons of rainwater your roof can collect each year and size your storage tank accordingly. Ideal for homeowners planning irrigation systems, off-grid setups, or drought resilience. | Estimate how many gallons of rainwater you can collect annually from your roof based on roof area, local annual rainfall, and system collection efficiency. Perfect for homeowners planning rainwater harvesting systems for irrigation or non-potable uses. |