How do you convert Cubic Feet per Minute (CFM) to Feet per Second (FPS)? The CFM to FPS Calculator is a tool designed to make this conversion easy. Enter the Total Cubic Feet Per Minute (CFM) and the Cross-Sectional Area (ft²) into the calculator to find the FPS (ft/s).
CFM to FPS Calculator
Enter any 2 values to calculate the missing variable:
Advanced mode: Enter all values to calculate the air velocity:
The CFM to FPS Calculator helps you determine the velocity of air in a duct or pipe. By knowing the volume of air (in CFM) and the cross-sectional area of the duct, you can calculate the airspeed in feet per second (FPS).
How to Use ?
To use the CFM to FPS Calculator is straightforward. Follow these steps:
- Total Cubic Feet Per Minute (CFM): Enter the CFM value. For example,
500 CFM
. - Cross-Sectional Area (ft²): Enter the area in square feet. For example,
2 ft²
. - FPS from CFM (ft/s): The calculator will compute the FPS value based on the inputs.
Formula
To convert CFM to FPS, use the following formula:
Variable | Description |
---|---|
CFM | Cubic Feet per Minute |
Cross-Sectional Area | Area in square feet |
FPS | Feet per Second |
Air Density (lb/ft³) | Density of the air |
Mass Flow Rate (lb/min) | Mass flow rate of the air |
Height | Total height in inches |
Velocity (ft/s) | Calculated air velocity |
Calculation Examples
Example 1
- Total Cubic Feet Per Minute (CFM):
300 CFM
- Cross-Sectional Area (ft²):
1.5 ft²
Step-by-Step Calculation:
1. Apply the Formula:
2. Calculate the Denominator:
3. Divide:
4. Result:
Example 2
- Total Cubic Feet Per Minute (CFM):
450 CFM
- Cross-Sectional Area (ft²):
2 ft²
Step-by-Step Calculation:
1. Apply the Formula:
2. Calculate the Denominator:
3. Divide:
4. Result: