1. What is a Hose Flow Rate Calculator?

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

Purpose: It helps irrigation professionals, firefighters, and homeowners determine water flow for various applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The velocity and area determine volumetric flow, which is then converted to standard GPM units.

3. Importance of Flow Rate Calculation

Details: Proper flow rate estimation ensures adequate water supply, proper system design, and efficient operation of irrigation or firefighting systems.

4. Using the Calculator

Tips: Enter the flow velocity in ft/s and the hose's cross-sectional area in ft². Typical garden hoses have velocities of 5-10 ft/s at 40-80 psi.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical flow rate for garden hoses?
A: Most garden hoses flow between 5-10 GPM at standard residential water pressures (40-80 psi).

Q2: How do I find the cross-sectional area?
A: Measure the inner diameter (ID) of the hose and calculate area using \( A = \pi \times (ID/2)^2 \).

Q3: Does pressure affect the flow rate?
A: Yes, higher pressure typically increases velocity and thus flow rate, up to system limits.

Q4: Why is the conversion factor 448.83?
A: It converts cubic feet per second to gallons per minute (1 ft³/s = 448.83 GPM).

Q5: Can I use this for pipes as well as hoses?
A: Yes, the formula works for any conduit carrying water, though friction losses may vary.