Calculate cylindrical drum volume, radius or depth, or estimate a volume range from dry laundry weight and explicit loading-density assumptions.

Use the internal radius and depth of a cylindrical drum.

Cylinder volume is not a rated laundry capacity. Laundry estimates require model-specific dry-load factors.

Half the internal drum diameter.

Loading assumptions

Dryer Capacity Formula

DC = pi ร— r ยฒ ร— d

Variables:

  • DC is the ideal cylindrical drum volume (ft^3), not a manufacturer-rated laundry load
  • r is the radius (ft)
  • d is the depth (ft)

To calculate cylindrical drum volume, square the internal radius, then multiply by pi and the internal depth. Radius is half the internal diameter. Optional dry-load estimates require both model-specific load-factor bounds in pounds of dry laundry per cubic foot; no universal industry factor is applied.

How to Calculate Dryer Capacity?

The following steps outline how to calculate the Dryer Capacity.

  1. First, determine the radius (ft). 
  2. Next, determine the depth (ft). 
  3. Next, gather the formula from above = DC = pi * r ^2 * d.
  4. Finally, calculate the Dryer Capacity.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

radius (ft) = 1.5

depth (ft) = 2

Ideal cylinder volume = ฯ€ ร— 1.5ยฒ ร— 2 = 14.1372 ftยณ. This geometric result does not establish a rated dry laundry load.

FAQ

What is the significance of the radius in calculating dryer capacity?
The radius of the dryer is crucial because it directly influences the total volume of the cylinder that makes up the dryer. Since the volume is proportional to the square of the radius, even small increases in the radius can significantly increase the dryer’s capacity.

How does depth affect the dryer capacity?
The depth of the dryer, along with the radius, determines the volume of the cylinder. Increasing the depth allows for more space inside the dryer, thereby increasing its capacity to hold materials.

Can this formula be used for dryers of any shape?
No, the given formula (DC = pi * r^2 * d) is specifically for cylindrical dryers. Dryers of different shapes, such as rectangular or spherical, would require different formulas to accurately calculate their capacity.

Why is it important to calculate dryer capacity?
Cylinder volume helps compare drum dimensions. It alone cannot determine a safe or efficient load: follow the model-specific rated load and fabric instructions, and allow room for tumbling.