Introduction | Humidity | Measuring | Dew Point | Calculate | Activity

Calculate Relative Humidity

On a warm 76°F day, you measure that there is half a gram of vapor for each cubic yard of air.

At that temperature, air is able to hold 1 gram of vapor for each cubic yard of air. So what is the relative humidity?

To find the answer, divide the amount of vapor in the air (0.5 grams) by the total amount the air can hold (1 gram) and multiply by 100 to calculate relative humidity as a percentage.

(Answer: 50%)