1. What is a PSI to GPM Calculator?

Definition: This calculator converts pressure difference (PSI) to flow rate (GPM) using fluid dynamics principles.

Purpose: It helps engineers and technicians determine fluid flow rates in pipes based on pressure measurements.

2. How Does the Calculator Work?

The calculator uses these formulas:

Where:

• \( V \) — Velocity (feet per second)
• \( P_1 \) — Initial pressure (psi)
• \( P_2 \) — Final pressure (psi)
• \( \rho \) — Fluid density (pounds per cubic foot)
• \( Q \) — Flow rate (gallons per minute)
• \( A \) — Pipe cross-sectional area (square feet)

Explanation: The pressure difference is converted to velocity, which is then used to calculate volumetric flow rate.

3. Importance of PSI to GPM Conversion

Details: Accurate flow rate calculations are essential for system design, pump sizing, and process control in fluid systems.

4. Using the Calculator

Tips: Enter the pressure values (P₁ and P₂), fluid density (default 62.4 lb/ft³ for water), and pipe area. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the 144 factor in the formula?
A: This converts psi (lb/in²) to lb/ft² (1 ft² = 144 in²).

Q2: Why 448.83 in the flow rate formula?
A: This converts ft³/s to GPM (1 ft³/s = 448.83 GPM).

Q3: What's a typical fluid density?
A: Water is 62.4 lb/ft³ at room temperature. Other fluids have different densities.

Q4: How do I find pipe area?
A: For circular pipes: \( A = \pi \times (diameter/2)^2 \) (convert diameter to feet).

Q5: Does this account for friction losses?
A: No, this is ideal flow. For real-world applications, consider additional factors like pipe roughness.