The relative humidity is the ratio of the current absolute humidity to the maximum possible absolute humidity (which depends on the current air temperature). It can be calculated as follows:
Relative humidity = (Absolute humidity / Maximum possible absolute humidity) x 100
Absolute humidity = mass of water vapor/volume of air
The maximum possible absolute humidity can be calculated from the air temperature using the saturation vapor pressure equation.
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Choose the units of your temperature and dew point temperature...
Enter values for temperature and dew point temperature. Press "Calculate" to compute Relative Humidity.
