Water Heater Size Calculator vs Water Heater Efficiency Calculator
Two calculators for the same neighbourhood of questions. Here is what each measures, what you feed in, and where you'd reach for one over the other.
Water Heater Size Calculator
Estimates the recommended water heater tank capacity in gallons based on household size and hot water usage habits. Use it when purchasing a new water heater or upgrading to match a growing household's demand.
- Answers
- Recommended Capacity (gallons)
- Inputs
- Number of Occupants, Usage Level
Water Heater Efficiency Calculator
Estimate your monthly water heating cost in dollars based on hot water usage, temperature settings, heater efficiency, and energy price. Use it to compare operating costs before upgrading to a more efficient unit.
- Answers
- Monthly Heating Cost ($)
- Inputs
- Daily Hot Water Usage, Incoming Water Temperature, Target Hot Water Temperature, Water Heater Efficiency, Energy Cost
At a glance
| Water Heater Size Calculator | Water Heater Efficiency Calculator | |
|---|---|---|
| Category | Plumbing | Water Usage |
| Answers | Recommended Capacity | Monthly Heating Cost |
| Inputs | 2 | 5 |
| Result unit | gallons | $ |
When to use each
Estimates the recommended water heater tank capacity in gallons based on household size and hot water usage habits. Use it when purchasing a new water heater or upgrading to match a growing household's demand.
Estimate your monthly water heating cost in dollars based on hot water usage, temperature settings, heater efficiency, and energy price. Use it to compare operating costs before upgrading to a more efficient unit.