1. What is GPM to CFS Conversion?

GPM (gallons per minute) and CFS (cubic feet per second) are both units used to measure flow rates. The conversion between these units is important in various engineering and fluid dynamics applications.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

Where:

• \( CFS \) — Cubic feet per second
• \( GPM \) — Gallons per minute
• \( 448.831 \) — Conversion factor (gallons per minute to cubic feet per second)

Explanation: The conversion factor 448.831 comes from the relationship between gallons and cubic feet, and minutes and seconds.

3. Importance of Flow Rate Conversion

Details: Accurate flow rate conversion is crucial for engineering calculations, pipe sizing, pump selection, and various hydraulic system designs where different units may be used in specifications.

4. Using the Calculator

Tips: Enter the flow rate in gallons per minute (GPM). The value must be greater than 0. The calculator will automatically compute the equivalent flow rate in cubic feet per second (CFS).

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 448.831?
A: It's derived from 1 cubic foot = 7.48052 gallons and 1 minute = 60 seconds (7.48052 × 60 ≈ 448.831).

Q2: When would I need to convert GPM to CFS?
A: Common in civil engineering, hydrology, and when working with US customary units where different systems use different standard units.

Q3: Is this conversion exact?
A: Yes, the conversion factor is mathematically exact based on the defined relationships between the units.

Q4: Can I convert CFS back to GPM?
A: Yes, by multiplying CFS by 448.831 (the inverse of our formula).

Q5: What are typical GPM values in practice?
A: Household water pressure might deliver 4-8 GPM, while large pumps can handle thousands of GPM.