1. What is the GPH to HP Conversion?

The GPH to HP conversion calculates the horsepower required for a pump based on flow rate (gallons per hour) and head height (feet). This is essential for selecting appropriately sized pumps for various applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( GPH \) — Flow rate in gallons per hour
• \( head \) — Head height in feet
• \( 60 \) — Conversion factor (minutes to hours)
• \( 3960 \) — Constant for horsepower calculation

Explanation: This formula converts flow rate and head pressure into the mechanical power (horsepower) required to move the fluid.

3. Importance of Pump Power Calculation

Details: Accurate pump power calculation is crucial for selecting the right pump size, ensuring energy efficiency, preventing motor overload, and achieving optimal system performance.

4. Using the Calculator

Tips: Enter flow rate in GPH and head height in feet. Both values must be positive numbers. The calculator will compute the required horsepower.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 3960 used in the formula?
A: The constant 3960 comes from the conversion of units to horsepower (1 HP = 550 ft-lb/sec) and the density of water.

Q2: Does this formula work for all fluids?
A: This formula is specifically designed for water. For other fluids, additional factors like specific gravity must be considered.

Q3: What is head height in pumping systems?
A: Head height refers to the vertical distance that a pump must move fluid, plus friction losses in the piping system.

Q4: Should I add a safety factor to the calculated HP?
A: Yes, it's common practice to add a 10-20% safety margin to account for system inefficiencies and future demands.

Q5: Can this calculator be used for submersible pumps?
A: Yes, the formula applies to all centrifugal pumps, including submersible models, when moving water.