1. What is a Volume Flow Rate Water Hose Calculator?

Definition: This calculator estimates the volume flow rate of water through a hose based on water velocity and the hose's cross-sectional area.

Purpose: It helps plumbers, irrigation specialists, and engineers determine water flow in gallons per minute (GPM) for various applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Flow rate (gallons per minute)
• \( V \) — Water velocity (feet per second)
• \( A \) — Cross-sectional area of hose (square feet)
• 448.83 — Conversion factor (cubic feet to gallons and seconds to minutes)

Explanation: The formula converts the basic flow rate calculation (velocity × area) into practical units (GPM) for water systems.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate estimation ensures proper water pressure, adequate supply for irrigation, and correct sizing of plumbing systems.

4. Using the Calculator

Tips: Enter the water velocity in ft/s and the hose's cross-sectional area in ft². Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I find the cross-sectional area of my hose?
A: Measure the inner diameter (D) of the hose and calculate area as π×(D/2)², then convert to square feet.

Q2: What's a typical water velocity in residential plumbing?
A: Most systems are designed for 5-8 ft/s velocity to balance flow and pressure loss.

Q3: Why is the conversion factor 448.83?
A: It combines 7.48052 (gallons per cubic foot) and 60 (seconds per minute): 7.48052 × 60 ≈ 448.83.

Q4: Can I use this for pipes as well as hoses?
A: Yes, this calculation works for any water-carrying conduit with known dimensions and velocity.

Q5: How does flow rate affect water pressure?
A: Higher flow rates generally result in greater pressure loss due to friction in the hose/pipe.