Pump Altitude Calculator
This tool adjusts pump conditions for elevation changes, assuming flooded suction and electric motor drive.
| Head in Feet | |
|---|---|
| Flow Rate in GPM | |
| Feet of NPSHr | |
| Brake Horsepower (hp) | |
| Elevation in Feet | |
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This calculator adjusts pump performance values to account for changes in elevation, assuming a flooded suction and an electric motor drive. As elevation increases, atmospheric pressure drops — reducing the available Net Positive Suction Head (NPSHa) and requiring motors to be derated at high altitudes.
By entering your pump's original conditions and site elevation, this tool recalculates:
- Adjusted NPSHa based on elevation
- Derated brake horsepower (BHP) if applicable
- Flow and Head remain constant for reference
Other Pump Conversion Formulas
- Pressure Conversions
- Flow Conversions
- Temperature Convertions
- Vacuum Conversions
- Speed Change (Affinity Laws)
- Length Converter
- Viscosity Conversion
- Volume Conversion and Calculations of Cylinders, Squares, and Rectangles
- Pipe Velocity & Minimum Pipe Diameter
- Required Pump Horsepower
- Net Positive Suction Head Available (NPSHA)
- Total Dynamic Head
- Horsepower Conversion
- Density to Specific Gravity