1. What is GPM CFS Conversion?

Definition: This calculator converts between gallons per minute (GPM) and cubic feet per second (CFS) flow rate measurements.

Purpose: It helps engineers, plumbers, and water resource professionals convert between these common flow rate units.

2. How Does the Conversion Work?

The conversion uses the formula:

Where:

• \( Q_{gpm} \) — Flow rate in gallons per minute
• \( Q_{cfs} \) — Flow rate in cubic feet per second
• 448.83 — Conversion factor (1 ft³/s = 448.83 gpm)

Explanation: One cubic foot per second equals approximately 448.83 gallons per minute.

3. Importance of Flow Rate Conversion

Details: Different industries use different units - CFS is common in hydrology while GPM is standard in plumbing and irrigation.

4. Using the Calculator

Tips: Enter the flow rate in CFS to get the equivalent in GPM. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 448.83?
A: It's derived from the fact that 1 cubic foot = 7.48052 gallons and 1 minute = 60 seconds (7.48052 × 60 ≈ 448.83).

Q2: How do I convert GPM back to CFS?
A: Divide the GPM value by 448.83 to get CFS.

Q3: Which industries use which units?
A: CFS is common in hydrology and river flow measurements, while GPM is standard in plumbing, irrigation, and industrial processes.

Q4: What's a typical household water flow rate?
A: Most homes have 5-10 GPM (0.011-0.022 CFS) total water supply capacity.

Q5: How accurate is this conversion?
A: The conversion factor is mathematically exact, though practical measurements may have instrument error.