Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Water Usage
Rainwater Harvesting Calculator
Estimate how many gallons of rainwater your roof can collect annually and what tank size you need to meet your water goals. Useful for sizing cisterns, rain barrels, and off-grid water systems.
Fill in the required fields to see your result.
Water Usage
Drip Leak Water Waste Calculator
Find out how much water a dripping faucet wastes per year and what it costs you. Use this whenever you spot a slow leak to make the case for a quick repair.
Fill in the required fields to see your result.
Key differences
| Rainwater Harvesting Calculator | Drip Leak Water Waste Calculator | |
|---|---|---|
| Category | Water Usage | Water Usage |
| Inputs required | 4 | 3 |
| Result | Annual Rainwater Collection (gallons) | Annual Waste Cost ($) |
| What it does | Estimate how many gallons of rainwater your roof can collect annually and what tank size you need to meet your water goals. Useful for sizing cisterns, rain barrels, and off-grid water systems. | Find out how much water a dripping faucet wastes per year and what it costs you. Use this whenever you spot a slow leak to make the case for a quick repair. |