Calculate room air volume from dimensions or total air moved from airflow and time, with cubic feet and cubic meter results.

Air Volume Formula

The following formula is used to calculate the Air Volume. 

AV = AF * T
  • Where AV is the Air Volume (ft^3)
  • AF is the volumetric air flow (CFM) 
  • T is the total time (minutes) 

To calculate air volume, multiply the volumetric air flow (ft^3/min) by the total time.

How to Calculate Air Volume?

The following example problems outline how to calculate Air Volume.

Example Problem #1:

  1. First, determine the volumetric air flow (CFM).
    1. The volumetric air flow (CFM) is given as: 30.
  2. Next, determine the total time (minutes).
    1. The total time (minutes) is provided as: 5.
  3. Finally, calculate the Air Volume using the equation above: 

AV = AF * T

The values given above are inserted into the equation below:

AV = 30 * 5 = 150 (ft^3)

Example Problem #2: 

The variables needed for this problem are provided below:

volumetric air flow (CFM) = 6

total time (minutes) = 8

Entering these values and solving gives:

AV = 6 * 8 = 48 (ft^3)