# CFM to FPS Calculator

## CFM to FPS Calculator

Enter any 2 values to calculate the missing variable

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)**.

### Introduction

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:

**Variables**

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**: