1. What is Velocity to Volumetric Flow Rate Calculator?

Definition: This calculator converts fluid velocity and cross-sectional area into volumetric flow rate in gallons per minute (GPM).

Purpose: It helps engineers, plumbers, and fluid system designers determine the flow rate in pipes or channels based on velocity measurements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Volumetric flow rate (gallons per minute)
• \( V \) — Fluid velocity (feet per second)
• \( A \) — Cross-sectional area (square feet)
• 448.83 — Conversion factor (cubic feet per second to GPM)

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

3. Importance of Flow Rate Calculation

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

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

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

Q2: How do I measure cross-sectional area?
A: For circular pipes, use \( A = \pi r^2 \) where r is the radius. For other shapes, use appropriate area formulas.

Q3: What's a typical velocity for water in pipes?
A: Typically 2-5 ft/s for residential plumbing, 5-10 ft/s for industrial applications.

Q4: Can I use this for gases?
A: Yes, but note that gas flow rates are often measured in different units (SCFM or ACFM).

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