Enter the total volume (ft^3) into the Calculator. The calculator will evaluate the Dehumidifier Capacity. 

Dehumidifier Capacity Formula

DHC = V / 60 * 3


  • DHC is the Dehumidifier Capacity (SCFM)
  • V is the total volume (ft^3)

To calculate Dehumidifier Capacity, divide the total volume by 60, then multiply by 3.

How to Calculate Dehumidifier Capacity?

The following steps outline how to calculate the Dehumidifier Capacity.

  1. First, determine the total volume (ft^3). 
  2. Next, gather the formula from above = DHC = V / 60 * 3.
  3. Finally, calculate the Dehumidifier Capacity.
  4. 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.

total volume (ft^3) = 300,000

Frequently Asked Questions

What is Dehumidifier Capacity?

Dehumidifier Capacity, measured in Standard Cubic Feet per Minute (SCFM), refers to the amount of air a dehumidifier can treat by removing moisture within a minute.

Why is it important to calculate the correct Dehumidifier Capacity?

Calculating the correct Dehumidifier Capacity ensures efficient moisture removal, prevents mold and mildew growth, and maintains a comfortable indoor humidity level.

Can I use the same formula for any room size?

Yes, the formula DHC = V / 60 * 3 can be used for any room size. However, it’s important to accurately measure the room’s total volume (ft^3) for precise calculations.

How often should I check or replace my dehumidifier to maintain its capacity?

Regular maintenance, such as cleaning filters and checking for leaks, should be performed every few months. Replacement depends on the dehumidifier’s performance and age, but typically, a dehumidifier can last 3-5 years with proper care.