Water Heater Size Calculator vs Water Heater Usage 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 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.
- Answers
- Annual Water Heating Cost ($)
- Inputs
- Water Heater Type, Daily Hot Water Usage, Cold Water Inlet Temperature, Target Hot Water Temperature, Energy Cost per Therm/kWh
At a glance
| Water Heater Size Calculator | Water Heater Usage Calculator | |
|---|---|---|
| Category | Plumbing | Water Usage |
| Answers | Recommended Capacity | Annual Water 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 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.