1. What is the PSI to GPM Formula?

The PSI to GPM formula calculates the flow rate (in gallons per minute) through a pipe or orifice based on the pressure (in PSI) and the diameter of the opening. This equation is commonly used in fluid dynamics, plumbing, and irrigation systems.

2. How Does the Calculator Work?

The calculator uses the PSI to GPM formula:

Where:

• \( Q \) — Flow rate in gallons per minute (GPM)
• \( d \) — Diameter of the orifice or pipe in inches
• \( P \) — Pressure in pounds per square inch (PSI)

Explanation: The formula accounts for the relationship between pressure, orifice size, and resulting flow rate, with 29.81 being a constant that incorporates conversion factors and fluid properties.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate calculation is essential for designing plumbing systems, sizing pumps, planning irrigation systems, and ensuring proper water distribution in various applications.

4. Using the Calculator

Tips: Enter the diameter in inches and pressure in PSI. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What does GPM stand for?
A: GPM stands for Gallons Per Minute, which is a unit of flow rate measurement.

Q2: What is PSI in fluid dynamics?
A: PSI stands for Pounds per Square Inch, which measures pressure in a fluid system.

Q3: Can this formula be used for any fluid?
A: This specific formula is primarily designed for water. Different fluids with varying viscosities and densities would require adjustments to the constant.

Q4: How accurate is this calculation?
A: The formula provides a theoretical maximum flow rate. Actual flow may be affected by factors like pipe friction, fittings, and fluid temperature.

Q5: What are typical GPM values for household plumbing?
A: Typical household fixtures range from 1.5-2.5 GPM for faucets, 2.0-2.5 GPM for showerheads, and 3.0-5.0 GPM for garden hoses.