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 you can collect annually from your roof, capped by your tank size. Use it when designing a rain barrel system or planning irrigation needs.
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 Harvestable Water (gallons) | Annual Waste Cost ($) |
| What it does | Estimate how many gallons of rainwater you can collect annually from your roof, capped by your tank size. Use it when designing a rain barrel system or planning irrigation needs. | 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. |