Relative Humidity
Relative humidity, abbreviated as RH, a dimensionless number, is a measure of the amount of moisture in the air with respect to the temperature.
Relative Humidity formula |
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\(\large{ RH = \frac{e}{e_s} \;100 }\) | ||
Symbol | English | Metric |
\(\large{ RH }\) = relative humidity | \(\large{dimensionless}\) | |
\(\large{ e }\) = actual vapor pressure | \(\large{\frac{lbf}{in^2}}\) | \(\large{Pa}\) |
\(\large{ e_s }\) = saturated vapor pressure | \(\large{\frac{lbf}{in^2}}\) | \(\large{Pa}\) |
Relative Humidity formula |
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\(\large{ RH = 100 \; \left( \frac{ 112 \; - \; 0.1 \; T \; + T_d }{ 112 \; + \; 0.9 \; T } \right)^8 }\) | ||
Symbol | English | Metric |
\(\large{ RH }\) = relative humidity | \(\large{dimensionless}\) | |
\(\large{ T_d }\) = dewpoint | \(\large{F}\) | \(\large{C}\) |
\(\large{ T }\) = temperature | \(\large{F}\) | \(\large{C}\) |