Gas Flow Rate Conversion Calculator

Flow Rate Conversion Formula:

\[ Q_{gpm} = \frac{Q_{cfm}}{7.481} \]

Flow Rate (GPM):

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1. What is a Gas Flow Rate Conversion Calculator?

Definition: This calculator converts gas flow rate from cubic feet per minute (CFM) to gallons per minute (GPM) equivalent.

Purpose: It helps engineers and technicians compare or convert between different flow rate units used in fluid systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q_{gpm} = \frac{Q_{cfm}}{7.481} \]

Where:

\( Q_{gpm} \) — Flow rate in gallons per minute
\( Q_{cfm} \) — Flow rate in cubic feet per minute
7.481 — Conversion factor (gallons per cubic foot)

Explanation: The conversion accounts for the volume difference between cubic feet and gallons (1 ft³ = 7.481 gallons).

3. Importance of Flow Rate Conversion

Details: Accurate conversion between units ensures proper system design, equipment selection, and performance comparisons across different measurement systems.

4. Using the Calculator

Tips: Enter the gas flow rate in CFM (cubic feet per minute). The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why convert CFM to GPM?
A: Some systems specify flow requirements in GPM while others use CFM. Conversion allows comparison and standardization.

Q2: Does this account for gas density?
A: No, this is a volumetric conversion. For mass flow rates, additional density calculations would be needed.

Q3: Is 7.481 always the correct conversion factor?
A: Yes, for US gallons. For imperial gallons (UK), use 6.229 instead.

Q4: Can I use this for liquid flow rates?
A: Yes, the conversion works for any fluid when comparing volumetric flow rates.

Q5: How precise is this conversion?
A: The conversion is mathematically exact, though real-world measurements may have instrumentation errors.