Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Water Usage
Water Heater Usage Calculator
Estimate your water heater's annual energy cost based on hot water demand and temperature rise. Ideal for comparing heater types or finding savings before buying a new unit.
Fill in the required fields to see your result.
Water Usage
Shower Water Usage Calculator
Estimate the monthly water consumed by showering based on shower length, showerhead flow rate, and how often you shower. A simple way to size the savings from a low-flow showerhead or shorter showers.
Fill in the required fields to see your result.
Key differences
| Water Heater Usage Calculator | Shower Water Usage Calculator | |
|---|---|---|
| Category | Water Usage | Water Usage |
| Inputs required | 5 | 3 |
| Result | Annual Water Heating Cost ($) | Monthly Water Usage (liters) |
| What it does | Estimate your water heater's annual energy cost based on hot water demand and temperature rise. Ideal for comparing heater types or finding savings before buying a new unit. | Estimate the monthly water consumed by showering based on shower length, showerhead flow rate, and how often you shower. A simple way to size the savings from a low-flow showerhead or shorter showers. |