1. What is CFS to GPM Conversion?

The CFS (cubic feet per second) to GPM (gallons per minute) conversion is used to convert between two common units of water flow rate measurement. This is particularly important in hydrology, water resource management, and engineering applications.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

Where:

• \( GPM \) — Gallons per minute
• \( CFS \) — Cubic feet per second
• \( 448.831 \) — Conversion factor (exact value)

Explanation: One cubic foot contains approximately 7.48052 gallons, and one minute is 1/60 of a second. The exact conversion factor combines these relationships.

3. Importance of Flow Rate Conversion

Details: Accurate flow rate conversion is essential for water system design, irrigation planning, pump sizing, and regulatory compliance where different measurement units are used.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 448.831?
A: This comes from (7.48052 gallons/ft³) × (60 seconds/minute) = 448.8312 gallons·min⁻¹·ft⁻³·s

Q2: When would I need to convert CFS to GPM?
A: Common in US water systems where CFS is used for large flows (rivers, reservoirs) and GPM for smaller systems (pipes, pumps).

Q3: Is this conversion only for water?
A: The conversion factor is specific to water. Other fluids would require density adjustments.

Q4: How accurate is this conversion?
A: The conversion factor is mathematically exact, assuming standard definitions of the units.

Q5: What's the reverse conversion (GPM to CFS)?
A: Divide GPM by 448.831 to get CFS (CFS = GPM / 448.831).