GPH to HP Calculator
Convert gallons per hour (GPH) to horsepower (HP) for pumps and fluid systems. Calculate pump power requirements based on flow rate, pressure, and efficiency.
Pump Power Calculator
Power Results
Enter values and click "Calculate" to see power requirements
GPH to HP Calculator
When working with pumps or fluid systems, flow rate alone is not enough. You also need to know how much power is required to move that fluid. A GPH to HP Calculator helps convert gallons per hour (GPH) into horsepower (HP) using pressure and efficiency.
Higher pressure or lower efficiency means more horsepower is required for the same flow rate.
This calculator uses standard pump engineering formulas to give accurate power requirements for various fluid transfer applications.
Pump Power Formulas
Standard Pump Power Calculations
Using Pressure (PSI)
HP = (GPH × PSI) ÷ (1714 × Efficiency)
Calculate HP from flow rate and pressure. 1714 is the conversion constant for US gallons.
Using Head (Feet)
HP = (GPH × Head) ÷ (3960 × Efficiency)
Calculate HP from flow rate and head pressure. 3960 accounts for feet of head.
Efficiency Factor
Efficiency = Actual Power ÷ Theoretical Power
Typical pump efficiency ranges from 50-85%. Higher efficiency means less wasted power.
These formulas follow standard fluid dynamics principles used in pump engineering.
Pump Power Examples
Common Power Requirements
| Flow Rate (GPH) | Pressure (PSI) | Efficiency | HP Required |
|---|---|---|---|
| 500 | 30 | 70% | 12.5 HP |
| 1000 | 40 | 75% | 31.1 HP |
| 1500 | 50 | 70% | 62.6 HP |
| 2000 | 60 | 80% | 87.4 HP |
These examples show typical power requirements for centrifugal pumps. Actual requirements may vary based on pump type and system conditions.
Final Thoughts
Power calculations don't need to be complicated. A GPH to HP Calculator gives quick, accurate results by combining flow rate, pressure, and efficiency. Just select a tab, enter your values, and get instant answers you can rely on.