<Dd> a = 6.112 mb, b = 17.62, c = 243.12 ° C; for − 45 ° C ≤ T ≤ 60 ° C (error ± 0.35 ° C). </Dd> <P> Another common set of values originates from the 1974 Psychrometry and Psychrometric Charts, as presented by Paroscientific, </P> <Dl> <Dd> a = 6.105 mb, b = 17.27, c = 237.7 ° C; for 0 ° C ≤ T ≤ 60 ° C (error ± 0.4 ° C). </Dd> </Dl> <Dd> a = 6.105 mb, b = 17.27, c = 237.7 ° C; for 0 ° C ≤ T ≤ 60 ° C (error ± 0.4 ° C). </Dd>

Calculate dew point from dry bulb and relative humidity