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 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.
Fill in the required fields to see your result.
Key differences
| Water Pressure Drop Calculator | Water Heater Size Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 5 | 2 |
| Result | Available Pressure (PSI) | Recommended Capacity (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. | 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. |