1. What is a 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 flow rates in pipes and channels.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Volumetric flow rate (gallons per minute)
• \( V \) — Velocity (feet per second)
• \( A \) — Cross-sectional area (square feet)
• 448.83 — Conversion factor (ft³/s to GPM)

Explanation: The velocity multiplied by area gives flow in ft³/s, 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.

4. Using the Calculator

Tips: Enter the fluid velocity in ft/s and the pipe/channel 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 find the cross-sectional area?
A: For circular pipes: \( A = \pi \times r^2 \) where r is radius in feet.

Q3: What's a typical velocity for water in pipes?
A: Typically 2-8 ft/s for water, with 4-5 ft/s being common in many applications.

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

Q5: Does this account for friction losses?
A: No, this calculates theoretical flow rate. Actual flow may be less due to friction and other losses.