How to Calculate Air Volume

Calculating the volume of the air in your home, your building or your room can help you determine how much heating and cooling will cost and how much air should circulate through the area. Calculating air volume can also help you to figure out how much helium or other gases you might need to fill large balloons or other objects. Air volume, like other volumes, can be calculated in cubic dimensions.

Instructions

How to Calculate Air Volume

1. Calculate the size of the room, building or object you are measuring by figuring out the length, height and width of the object and multiplying the three numbers together. For round objects, multiply the radius (the distance from the center to an edge) of the sphere by itself three times, multiply that amount by pi (3.14), then multiply that amount by (4/3).

2. Measure the volume of every item in the room--such as dressers, boxes or cases--by the same method of multiplying the height by the width and the length.

3. Add the volume of every item from Step 2 together to find out the negative volume space in the room that is not occupied by air.

4. Subtract the sum from Step 3 from the volume from Step 1 to determine the total air volume of the space.

References

• How to Calculate Volume