1. What is HP from GPM and PSI Calculator?

Definition: This calculator estimates the hydraulic horsepower required based on flow rate (GPM), pressure (PSI), and pump efficiency.

Purpose: It helps engineers and technicians determine the power requirements for hydraulic systems and pumps.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( HP \) — Hydraulic horsepower
• \( Q \) — Flow rate (gallons per minute)
• \( P \) — Pressure (pounds per square inch)
• \( \eta \) — Pump efficiency (0-1)

Explanation: The formula converts the hydraulic power (flow × pressure) to mechanical horsepower, accounting for pump efficiency.

3. Importance of Hydraulic Power Calculation

Details: Proper horsepower estimation ensures correct pump sizing, energy efficiency, and system reliability.

4. Using the Calculator

Tips: Enter the flow rate in GPM, pressure in PSI, and pump efficiency (default 0.85). All values must be > 0, and efficiency between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What does the 8.34 constant represent?
A: This is the weight of one gallon of water in pounds (8.34 lbs/gal).

Q2: Why is efficiency important in the calculation?
A: No pump is 100% efficient - the efficiency factor accounts for energy losses in the system.

Q3: What's a typical pump efficiency value?
A: Most pumps operate between 70-90% efficiency (0.7-0.9).

Q4: Can this be used for other fluids besides water?
A: The formula works for water. For other fluids, you'd need to adjust for specific gravity.

Q5: How does this relate to electric motor sizing?
A: The calculated HP is the hydraulic power required. The motor would need to be sized larger to account for its own efficiency.