Air-Flow Calculator

Are you looking to improve the air quality and efficiency of your ventilation system? Then you have come to the right place! Our Air-Flow Calculator is the perfect tool to help you calculate the correct air flow rate needed for your specific application. This calculator takes into account the size and type of your ducts, the cubic feet per minute (CFM) required for the space, and the static pressure of the system. By using this tool, you can make sure that your ventilation system is operating at optimal efficiency while providing clean and healthy air. Say goodbye to guessing and hello to accurate calculations with our Air-Flow Calculator.

Air-Flow Calculator

Calculate the air flow rate

Square Feet (ft2)
Feet per Minute (fpm)
Air-Flow Calculator Results
Air Flow Rate:0

Achieve optimal ventilation with our air flow calculator. To calculate air exchanges, visit our air exchange calculator.

How to Use the Air-Flow Calculator

The Air-Flow Calculator is a practical tool designed to calculate the air flow rate based on the area and velocity of the air. It allows you to determine the volume of air moving through a given space per unit of time. This calculator is useful in various applications where understanding and controlling air flow is essential, such as HVAC system design, ventilation analysis, and air quality management.


The Air-Flow Calculator finds its significance in various applications, including:

  • HVAC System Design: Determine the required air flow rate to ensure optimal heating, ventilation, and air conditioning in a space based on its size and air velocity requirements.
  • Ventilation Analysis: Assess the effectiveness of air exchange and ventilation systems by calculating the air flow rate in different areas.
  • Indoor Air Quality: Evaluate the adequacy of air supply and circulation to maintain optimal air quality and comfort in residential, commercial, and industrial spaces.

Instructions for Utilizing the Calculator

To use the Air-Flow Calculator, follow these instructions:

Input Fields

The calculator requires the following input fields:

  • Area: Enter the area of the space in square feet. It represents the surface area through which the air flows.
  • Velocity: Specify the air velocity in feet per minute (fpm). It represents the speed at which the air moves through the given area.

Accurate input values are crucial for obtaining reliable results.

Output Fields

The Air-Flow Calculator provides the following output field:

  • Air Flow Rate: Presents the calculated air flow rate in cubic feet per minute (CFM). It represents the volume of air passing through the given area per minute.

Air-Flow Calculator Formula

The calculator utilizes a straightforward formula to calculate the air flow rate:

Air Flow Rate = Area * Velocity

The formula multiplies the area and velocity values to determine the volume of air flowing through the space per unit of time.

Illustrative Example:

Let's consider an example to illustrate the calculator's usage:


  • Area: 500 Square Feet
  • Velocity: 200 fpm

Calculation: In this example, we need to calculate the air flow rate based on the given input values.

Air Flow Rate = 500 Square * 200 fpm = 100,000 CFM

In this example, with an area of 500 ft² and an air velocity of 200 fpm, the air flow rate would be 100,000 CFM.

Illustrative Table Example

Here is an example table showcasing different room configurations and their corresponding air flow rates:

Area (ft²)Velocity (fpm)Air Flow Rate (CFM)

The Air-Flow Calculator provides a valuable tool for calculating the air flow rate in a given space. By inputting the area and velocity, you can determine the volume of air moving through the area per unit of time. Understanding the air flow rate is crucial for HVAC system design, ventilation analysis, and maintaining optimal air quality. Utilize the Air-Flow Calculator to make informed decisions about air circulation and ensure efficient and effective air movement in various settings, contributing to improved comfort and indoor air quality.

About the Author

Author Image

Zayan Chowdhury
Theoretical physicist

Zayan Chowdhury is a theoretical physicist with a passion for exploring the fundamental laws of the universe. He is deeply interested in understanding the nature of dark matter and dark energy, and how they influence the evolution of the cosmos. Zayan has published several papers on topics ranging from black hole thermodynamics to quantum gravity, and his work has been recognized by leading physicists in the field. In his free time, Zayan enjoys reading philosophy and exploring the great outdoors.