GPM Flow Rate Calculator

Flow Rate Formula:

\[ Q = A \times v \times 15850.3 \]

Flow Rate (gpm):

Definition: This calculator estimates the flow rate in gallons per minute (gpm) based on cross-sectional area and fluid velocity.

Purpose: It helps engineers, plumbers, and fluid system designers determine flow rates for pipes, channels, and other conduits.

The calculator uses the formula:

\[ Q = A \times v \times 15850.3 \]

Where:

Explanation: The area and velocity are multiplied to get flow rate in m³/s, then converted to gpm.

Details: Accurate flow rate estimation ensures proper system design, pump selection, and performance evaluation in fluid systems.

Tips: Enter the cross-sectional area in m² and velocity in m/s. All values must be > 0.

Q1: Why is the conversion factor 15850.3?
A: This converts cubic meters per second (m³/s) to gallons per minute (gpm) (1 m³/s = 15850.3 gpm).

Q2: How do I measure cross-sectional area?
A: For circular pipes: \( A = \pi r² \). For rectangular channels: \( A = width \times height \).

Q3: What's a typical velocity for water in pipes?
A: Typically 0.5-2.5 m/s for water, depending on pipe size and application.

Q4: Can I use this for other fluids?
A: Yes, but the velocity range may differ based on fluid viscosity and density.

Q5: How accurate is this calculation?
A: It provides theoretical flow rate. Actual flow may vary due to friction, turbulence, and other factors.