Air Flow Converter Calculator

Air Flow Conversion Formula:

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

Flow Rate (CFM):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is an Air Flow Converter Calculator?

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

Purpose: It helps HVAC professionals, engineers, and technicians convert between different units of air flow measurement.

2. How Does the Calculator Work?

The calculator uses the formula:

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

Where:

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

Explanation: The conversion factor accounts for the volume difference between gallons and cubic feet.

3. Importance of Air Flow Conversion

Details: Proper air flow measurement is crucial for HVAC system design, ventilation calculations, and equipment sizing.

4. Using the Calculator

Tips: Enter the flow rate in GPM. The calculator will automatically provide the equivalent CFM value.

5. Frequently Asked Questions (FAQ)

Q1: Why is 7.481 the conversion factor?
A: There are 7.481 gallons in one cubic foot, making this the exact conversion between these units.

Q2: When would I need to convert GPM to CFM?
A: When working with systems that use different measurement units or when specifications require CFM values.

Q3: Is this conversion affected by temperature or pressure?
A: No, this is a simple volume-to-volume conversion that doesn't depend on air conditions.

Q4: Can I convert CFM back to GPM?
A: Yes, simply divide the CFM value by 7.481 to get GPM.

Q5: What's a typical GPM value for HVAC systems?
A: Residential systems typically range from 300-1200 GPM, while commercial systems can be much higher.