Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Plumbing
Water Pressure Drop Calculator
Calculates the residual water pressure (PSI) at the end of a piping run after accounting for elevation changes, pipe friction loss, and fittings. Use it to verify adequate pressure reaches the most remote fixture.
Fill in the required fields to see your result.
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.
Key differences
| Water Pressure Drop Calculator | Water Heater Sizing Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 5 | 5 |
| Result | Available Pressure (PSI) | Recommended Tank Size (gallons) |
| What it does | Calculates the residual water pressure (PSI) at the end of a piping run after accounting for elevation changes, pipe friction loss, and fittings. Use it to verify adequate pressure reaches the most remote fixture. | 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. |