To convert FPM to CFM, multiply the air velocity (in feet per minute) by the cross-sectional area of the duct (in square feet).
The FPM to CFM Calculator is essential for determining airflow in HVAC systems, ductwork design, and industrial ventilation. Airflow, measured in cubic feet per minute (CFM), helps evaluate system efficiency, ensuring optimal ventilation and air distribution.
This conversion links air velocity (feet per minute, FPM) with the duct cross-sectional area, making it easy to calculate the airflow through round or rectangular ducts. Whether you’re optimizing HVAC performance, calculating duct sizing, or analyzing air velocity, this calculator simplifies complex measurements for engineers, contractors, and enthusiasts alike.
Formula
CFM = FPM ∗ A
| Variable | Definition |
|---|---|
| CFM | Cubic Feet Per Minute (Airflow Volume) |
| FPM | Feet Per Minute (Air Velocity) |
| A | Cross-Sectional Area (Square Feet) |
Solved Calculations
Example 1: Calculate the airflow through a duct with an air velocity of 500 FPM and a cross-sectional area of 2 square feet.
| Variable | Value |
|---|---|
| Air Velocity (FPM) | 500 |
| Area (A) | 2 sq. ft. |
| CFM | 1,000 CFM |
Example 2: Determine the airflow for a duct with an air velocity of 750 FPM and an area of 3 square feet.
| Variable | Value |
|---|---|
| Air Velocity (FPM) | 750 |
| Area (A) | 3 sq. ft. |
| CFM | 2,250 CFM |
What is FPM (Feet Per Minute) to CFM (Cubic Feet Per Minute) Calculator | Instantly Understand Airflow, Wind Speed, Air Velocity with this HVAC System Oriented Calculator 2025:
The FPM to CFM Calculator is a valuable tool for converting air velocity in feet per minute (FPM) to volumetric airflow in cubic feet per minute (CFM).
It simplifies the process for engineers, HVAC professionals, and hobbyists working with ventilation, ductwork, or air circulation systems.
To perform the calculation, users need to input the FPM value and the duct cross-sectional area. The calculator multiplies these to determine the airflow in CFM, allowing users to size ducts, evaluate ventilation systems, or troubleshoot airflow issues.
For instance, converting FPM to CFM for round ducts is a common task, particularly when ensuring balanced airflow in HVAC systems.
Professionals can also use this tool in reverse to determine FPM from CFM for designing duct layouts. With applications ranging from industrial air handling systems to home HVAC setups, the calculator ensures precision and efficiency in airflow calculations.
Final Words:
To conclude, the FPM to CFM Calculator is an essential tool for accurate airflow measurements. It enhances efficiency in system design and maintenance, ensuring optimal ventilation and air circulation performance.
