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Relative Humidity Calculator

Relative humidity is the amount of water vapor present in air expressed as a percentage of the amount needed for saturation at the same temperature….or another way to think of it is percent of water moisture in air based on temperature.

Calculate
Relative Humidity

Enter temperature and dewpoint to calculate relative humidity

Temperature:
FC
Dewpoint:
Relative Humidity:
Looking for a deeper understanding? Below is the equation…

actual vapor pressure (e) = 0 = 0 millibar saturated vapor pressure (es) = 0 = 0 millibar
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