FPM to CFM Calculator | Feet per minute to cubic feet per minute
How to convert Feet Per Minute (FPM) to Cubic Feet per Minute (CFM)? The FPM to CFM Calculator is here to help. Just enter the values of FPM and area into the calculator, you can find the CFM quickly and accurately.
FPM to CFM Calculator
What is FPM to
To convert Feet Per Minute (FPM) to Cubic Feet Per Minute (CFM), you multiply FPM by the cross-sectional area of the duct or pipe (in square feet). This simple relationship is vital for determining airflow.
Formula
| FPM to CFM Formula | Explanation |
|---|---|
| CFM = FPM × Area | Multiply airflow speed (FPM) by duct area (ft²). |
Example Calculation
| FPM | Area (ft²) | CFM |
|---|---|---|
| 300 | 2 | 600 |
| 450 | 1.5 | 675 |
What Does CFM Stand For?
CFM means Cubic Feet Per Minute. It’s a unit for measuring airflow, often used in HVAC systems and industrial ventilation.
Importance of CFM
| Purpose | Details |
|---|---|
| Ventilation Systems | Ensures air circulation in buildings. |
| Equipment Efficiency | Helps calculate proper fan or duct sizes. |
How Many m/s in 1 FPM?
Feet Per Minute (FPM) converts to Meters Per Second (m/s) by dividing by 196.85. This conversion is handy for scientific and engineering contexts.
Conversion Formula
| m/s = FPM ÷ 196.85 | Divide FPM by 196.85 to get m/s. |
Conversion Examples
| FPM | m/s |
|---|---|
| 100 | 0.51 |
| 200 | 1.02 |
CFM to FPM Conversion Chart
Using a chart simplifies the conversion of CFM to FPM and vice versa. Below is a quick reference for common values:
| CFM | Area (ft²) | FPM |
|---|---|---|
| 500 | 1 | 500 |
| 750 | 2 | 375 |
| 1000 | 3 | 333.33 |
CFM to FPM Formula
The formula for converting CFM to FPM is just the reverse: | FPM = CFM ÷ Area | Divide CFM by duct area (ft²). |
Example
| CFM | Area (ft²) | FPM |
|---|---|---|
| 800 | 2 | 400 |
| 600 | 1.5 | 400 |
Calculate CFM Using FPM
To calculate CFM, you need the FPM value and the duct’s cross-sectional area. Use the basic formula CFM = FPM × Area.
Real-Life Examples
| FPM | Area (ft²) | CFM |
|---|---|---|
| 400 | 3 | 1200 |
| 200 | 1.5 | 300 |
How to Calculate Fan CFM
Fan CFM measures the airflow a fan produces. Use the duct size and FPM to compute.
Step-by-Step
- Measure the duct’s area.
- Use a device to find FPM.
- Apply the formula: CFM = FPM × Area.
Fan Example
| Fan Speed (RPM) | Blade Diameter (ft) | CFM (approx) |
|---|---|---|
| 1500 | 2 | 800 |
CFM and FPM Chart
A combined CFM and FPM chart offers a quick overview of airflow conversions for different duct sizes.
| CFM | FPM | Duct Size (ft²) |
|---|---|---|
| 600 | 300 | 2 |
| 900 | 450 | 2 |
| 1200 | 400 | 3 |
Result: 900 CFM
FAQs
1. What is the formula to calculate FPM (Feet Per Minute)?
The formula to calculate FPM is:
To calculate FPM, divide the air flow (CFM) by the cross-sectional area of the duct in square feet. This formula helps in determining the velocity of air moving through the duct.
2. How do you calculate air flow (CFM) for ventilation?
Air flow (CFM) can be calculated using the formula:
This equation requires the velocity of the air and the cross-sectional area of the duct to calculate the amount of air flow necessary for effective ventilation.
3. How do you calculate FPM in a duct?
To calculate the air velocity (FPM) in a duct, you need the CFM (Cubic Feet per Minute) and the duct’s cross-sectional area. Use the formula:
This will give you the velocity in feet per minute based on the air flow and duct size.
4. How do you calculate air flow rate from pressure?
Air flow rate can be calculated using Bernoulli’s principle or simplified formulas depending on the type of system. One common way is:
Final Words
We hope you find the FPM to CFM Calculator helpful. How was your experience? If you encountered any issues, please report them on our “Report an Error” page. Your feedback is important to us.