Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Water Usage
Hot Water Heater Sizing Calculator
Find the right storage water heater capacity (in gallons) for your home based on bedrooms, bathrooms, occupants, and usage habits. Use it before buying a new water heater or when upgrading an undersized unit.
Fill in the required fields to see your result.
Water Usage
Hot Water Energy Cost Calculator
Estimates your monthly water heating bill based on daily hot water use, temperature rise, energy source, and heater efficiency. Useful when comparing electric vs. gas heaters or auditing home energy costs.
Fill in the required fields to see your result.
Key differences
| Hot Water Heater Sizing Calculator | Hot Water Energy Cost Calculator | |
|---|---|---|
| Category | Water Usage | Water Usage |
| Inputs required | 5 | 5 |
| Result | Recommended Tank Size (gallons) | Monthly Heating Cost ($) |
| What it does | Find the right storage water heater capacity (in gallons) for your home based on bedrooms, bathrooms, occupants, and usage habits. Use it before buying a new water heater or when upgrading an undersized unit. | Estimates your monthly water heating bill based on daily hot water use, temperature rise, energy source, and heater efficiency. Useful when comparing electric vs. gas heaters or auditing home energy costs. |