CFM – Cubic Feet per Minute Calculator

By inputting the airflow velocity (in feet per minute, FPM) and the area in square feet, you can calculate the required volume of air (in cubic feet, CFM) for a specific space. Conversely, there is an option to find the necessary values of the area or FPM, based on the other two parameters.

Calculate CFM, FPM, or Area

What is CFM?

Have you ever wondered how much air the fan moves in a minute? That's where CFM comes in.
CFM stands for Cubic Feet per Minute, and it measures how much air moves through a space in one minute. For example, if you could capture all the air that flows past a certain point in the room in one minute and put it into a box, CFM would tell you how big that box would be in cubic feet.

CFM is used in:

Ventilation Systems: CFM determines the volume of air that needs to be circulated to keep a space well-ventilated. This is important for maintaining indoor air quality in homes, offices, and other buildings.

HVAC (Heating, Ventilation, and Air Conditioning): HVAC systems use CFM to regulate the flow of air for heating, cooling, and maintaining comfortable temperatures indoors.

Industrial Processes: CFM is used in various industrial processes where airflow is critical, such as in manufacturing, food processing, and chemical production.

Fans and Blowers: When you're shopping for fans or blowers, you'll often see CFM ratings. This tells you how much air the fan can move in a minute, helping you choose the right one for your needs.

CFM Formula:

\text{CFM} = \text{FPM} \times \text{Area (sq ft)}

where:

CFM - Cubic Feet per Minute - denotes the volume of air (in cubic feet) that passes through a given space in one minute.

FPM - Feet per Minute - measures the speed at which air moves through a space, duct, or ventilation system.

Area in square feet (sq ft)- represents the size of a two-dimensional space or surface in square feet, such as a room, building, or outdoor space.