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Calculate Relative Humidity
Temperature: °F °C K

Dew Point: °F °C K

Relative Humidity:

Equations:

Equations to Calculate Relative Humidity from Dew Point

In the above equation, T is the temperature in °C, Td is the dew point in °C, es is the saturation vapor pressure in millibars, e is the actual vapor pressure in millibars, and rh is the relative humidity in percent.