Water Pressure Drop Calculator vs Water Pressure & Flow 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 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.
- Answers
- Available Pressure (PSI)
- Inputs
- Static Water Pressure, Elevation Change, Friction Loss in Pipes, Number of Fittings/Valves, Fitting Type
Water Pressure & Flow Calculator
Estimate the flow rate (GPH) available at your fixtures given pipe size, supply pressure, elevation change, and pipe length. Use this when sizing a plumbing system or diagnosing low-pressure complaints.
- Answers
- Flow Rate per Fixture (GPM)
- Inputs
- Pipe Diameter, Water Pressure, Total Pipe Length, Elevation Change, Number of Fixtures
At a glance
| Water Pressure Drop Calculator | Water Pressure & Flow Calculator | |
|---|---|---|
| Category | Plumbing | Water Usage |
| Answers | Available Pressure | Flow Rate per Fixture |
| Inputs | 5 | 5 |
| Result unit | PSI | GPM |
When to use each
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.
Estimate the flow rate (GPH) available at your fixtures given pipe size, supply pressure, elevation change, and pipe length. Use this when sizing a plumbing system or diagnosing low-pressure complaints.