Flow Rate Calculation Formula

Flow Rate Formula:

\[ Q = V \times A \times 448.83 \]

Flow Rate (Q): GPM

Definition: This calculator computes the volumetric flow rate (Q) in gallons per minute (GPM) based on velocity and cross-sectional area.

Purpose: It helps engineers and technicians determine fluid flow rates in pipes, channels, and other conduits.

The calculator uses the formula:

\[ Q = V \times A \times 448.83 \]

Where:

Explanation: The velocity multiplied by area gives flow in cubic feet per second, which is then converted to GPM.

Details: Accurate flow rate calculations are essential for system design, pump selection, and ensuring proper fluid transport in piping systems.

Tips: Enter the fluid velocity in ft/s and the cross-sectional area in ft². All values must be > 0.

Q1: Why is the conversion factor 448.83?
A: It converts cubic feet per second to gallons per minute (1 ft³/s = 448.83 GPM).

Q2: What's a typical velocity for water in pipes?
A: Typically 2-8 ft/s, with 4-6 ft/s being common for many applications.

Q3: How do I calculate cross-sectional area?
A: For circular pipes: \( A = \pi \times r^2 \) where r is the radius in feet.

Q4: Does this work for any fluid?
A: Yes, but the velocity should be appropriate for the specific fluid's properties.

Q5: What if I have diameter instead of area?
A: First calculate area using \( A = \pi \times (D/2)^2 \) where D is diameter in feet.