Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Environment
Rainwater Harvesting Calculator
Calculate how many gallons of rainwater your roof can collect each year based on area, local rainfall, and system efficiency. Use it to size a storage tank or estimate irrigation potential.
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 | Annual Water Savings ($) | Annual Water Collection (gallons) |
| What it does | Calculate how many gallons of rainwater your roof can collect each year based on area, local rainfall, and system efficiency. Use it to size a storage tank or estimate irrigation potential. | 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. |