Enter the moisture content in the air and the moisture content at saturation into the Calculator. The calculator will evaluate the Percent Saturation. 

Percent Saturation Formula

PS = MCA / MCS * 100

Variables:

  • PS is the Percent Saturation (%)
  • MCA is the moisture content in the air
  • MCS is the moisture content at saturation

To calculate Percent Saturation, divide the moisture content int he air by the moisture content at saturation, then multiply by 100.

How to Calculate Percent Saturation?

The following steps outline how to calculate the Percent Saturation.


  1. First, determine the moisture content in the air. 
  2. Next, determine the moisture content at saturation. 
  3. Next, gather the formula from above = PS = MCA / MCS * 100.
  4. Finally, calculate the Percent Saturation.
  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.

moisture content in the air = 68

moisture content at saturation = 100

Frequently Asked Questions (FAQ)

What is Percent Saturation in terms of atmospheric conditions?

Percent Saturation refers to the ratio of the current amount of water vapor in the air to the maximum amount of water vapor the air can hold at a given temperature, expressed as a percentage. It is a key factor in understanding humidity and predicting weather patterns.

How does temperature affect moisture content and Percent Saturation?

Temperature plays a critical role in determining the moisture content air can hold. Warmer air can hold more moisture, increasing the moisture content at saturation. As temperature rises, the capacity of air to hold water vapor increases, potentially altering the Percent Saturation if the actual moisture content remains unchanged.

Why is calculating Percent Saturation important?

Calculating Percent Saturation is crucial for various applications, including weather forecasting, HVAC system design and operation, and understanding and controlling indoor air quality. It helps in assessing the humidity level of air, which can affect human comfort, building materials, and the growth of mold and bacteria.

Can Percent Saturation exceed 100%?

Yes, Percent Saturation can exceed 100%, a condition known as supersaturation. This occurs under specific conditions when air holds more moisture than it can theoretically contain at saturation. Supersaturation is often a precursor to the formation of fog, dew, or clouds as excess water vapor begins to condense.