1. What is the GPM to HP Conversion?

The GPM to HP conversion calculates the hydraulic horsepower required for a fluid system based on flow rate, pressure, and specific gravity. This is essential for pump sizing and hydraulic system design.

2. How Does the Calculator Work?

The calculator uses the hydraulic horsepower formula:

Where:

• \( HP \) — Horsepower
• \( Q \) — Flow rate in gallons per minute (GPM)
• \( P \) — Pressure in pounds per square inch (PSI)
• \( SG \) — Specific gravity (unitless)
• 1714 — Conversion constant

Explanation: The formula converts hydraulic power to mechanical horsepower, accounting for fluid properties through specific gravity.

3. Importance of HP Calculation

Details: Accurate horsepower calculation is crucial for proper pump selection, energy efficiency, system design, and preventing equipment overload.

4. Using the Calculator

Tips: Enter flow rate in GPM, pressure in PSI, and specific gravity (1.0 for water). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is specific gravity and when should I adjust it?
A: Specific gravity is the ratio of fluid density to water density. Use 1.0 for water, higher for denser fluids, lower for lighter fluids.

Q2: Why is the constant 1714 used?
A: 1714 is the conversion factor that relates GPM, PSI, and horsepower based on standard units and efficiency assumptions.

Q3: Does this calculate theoretical or actual horsepower?
A: This calculates theoretical hydraulic horsepower. Actual pump horsepower requirements will be higher due to efficiency losses.

Q4: Can this be used for air or gas systems?
A: This formula is primarily for liquid systems. Gas systems require different calculations due to compressibility.

Q5: How does efficiency affect the result?
A: To get actual motor horsepower, divide the result by pump efficiency (typically 0.7-0.9 for most pumps).