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FPM to CFM Formula:
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The FPM to CFM conversion calculates cubic feet per minute from feet per minute and cross-sectional area. This is commonly used in HVAC, ventilation, and airflow calculations to determine volumetric flow rate.
The calculator uses the FPM to CFM formula:
Where:
Explanation: The formula converts linear velocity (FPM) to volumetric flow rate (CFM) by multiplying by the cross-sectional area through which the air is flowing.
Details: CFM calculations are essential for proper HVAC system design, ventilation requirements, duct sizing, and ensuring adequate air exchange rates in buildings and industrial applications.
Tips: Enter FPM (velocity in feet per minute) and Area (cross-sectional area in square feet). Both values must be positive numbers greater than zero for accurate calculation.
Q1: What is the difference between FPM and CFM?
A: FPM measures linear velocity (feet per minute), while CFM measures volumetric flow rate (cubic feet per minute). CFM = FPM × Area.
Q2: Where is this conversion commonly used?
A: This conversion is widely used in HVAC design, ventilation systems, industrial exhaust systems, and airflow measurements in ducts and pipes.
Q3: How do I measure FPM in practice?
A: FPM can be measured using an anemometer or calculated from pressure differentials in duct systems using appropriate formulas.
Q4: What factors affect CFM requirements?
A: Room size, occupancy, heat load, air quality requirements, and specific application needs (kitchens, bathrooms, laboratories) all affect CFM requirements.
Q5: Can I use this for liquid flow calculations?
A: While the principle is similar, liquid flow calculations typically use different units (GPM instead of CFM) and account for fluid density and viscosity.