The Relative Humidity calculator computes the relative humidity based on the actual density of vapor and the saturated density.
INSTRUCTIONS: Choose units and enter the following:
Relative Humidity(rh): The calculator returns the relative humidity as a percentage.
is the amount of moisture in the air compared to what the air can "hold" at that temperature. Relative Humidity is also a common index regarding human comfort maintaining a normal temperature. Human comfort is ideally near 50% RH, while RD less than 30% is dry air and RD greater than 70% is considered humid.
When the air can't "hold" all the moisture,then it condenses as dew.
rh = W/Ws