Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Plumbing
Water Heater Sizing Calculator
Determines the minimum tank capacity (in gallons) your household needs based on occupants, bedrooms, bathrooms, usage pattern, and heater efficiency. Use it before buying or replacing a water heater.
Fill in the required fields to see your result.
Plumbing
Water Meter Sizing Calculator
Determines the appropriate water meter size (in inches) for a property by comparing peak flow demand against the meter's rated capacity at the available line pressure. Use it during new construction or meter upgrade planning.
Fill in the required fields to see your result.
Key differences
| Water Heater Sizing Calculator | Water Meter Sizing Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 5 | 4 |
| Result | Recommended Tank Size (gallons) | Recommended Meter Size (inches) |
| What it does | Determines the minimum tank capacity (in gallons) your household needs based on occupants, bedrooms, bathrooms, usage pattern, and heater efficiency. Use it before buying or replacing a water heater. | Determines the appropriate water meter size (in inches) for a property by comparing peak flow demand against the meter's rated capacity at the available line pressure. Use it during new construction or meter upgrade planning. |