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T_{dp} & = \frac{c\ln\frac{P_\mathrm{a}(T)}{a}}{b-\ln\frac{P_\mathrm{a}(T)}{a}} = \frac{c\ln\left(\frac\mathrm{RH}{100}\frac{P_\mathrm{s,m}(T)}{a}\right)}{b-\ln\left(\frac\mathrm{RH}{100}\frac{P_\mathrm{s,m}(T)}{a}\right)} = \frac{c\gamma_m(T,\mathrm{RH})}{b-\gamma_m(T,\mathrm{RH})};
\end{align}</math>
donde
where
*''a'' = 6.1121&nbsp;mbar, ''b'' = 18.678, ''c'' = 257.14&nbsp;°C, ''d'' = 234.5&nbsp;°C.
 
Otro conjunto común de valores proviene de las''Psychrometry and Psychrometric Charts'' publicadas en 1974, presentadas en '''''Paroscientific''''',<ref>{{cite web |url=http://www.paroscientific.com/dewpoint.htm |title=MET4 and MET4A Calculation of Dew Point |access-date=7 October 2014 |archive-url=https://archive.today/20120526034637/http://www.paroscientific.com/dewpoint.htm |archive-date=May 26, 2012 }}</ref>
*''a'' = 6.105&nbsp;mbar, ''b'' = 17.27, ''c'' = 237.7&nbsp;°C; for {{nowrap|0 °C ≤ ''T'' ≤ 60&nbsp;°C}} (error ±0.4&nbsp;°C).
También en el ''Journal of Applied Meteorology and Climatology'',<ref>{{cite journal|last1=Buck|first1=Arden L.|title=New Equations for Computing Vapor Pressure and Enhancement Factor|journal=Journal of Applied Meteorology|date=December 1981|volume=20|issue=12|pages=1527–1532|doi=10.1175/1520-0450(1981)020<1527:NEFCVP>2.0.CO;2|url=http://www.public.iastate.edu/~bkh/teaching/505/arden_buck_sat.pdf|bibcode=1981JApMe..20.1527B|access-date=2016-01-15|archive-date=2016-03-04|archive-url=https://web.archive.org/web/20160304093405/http://www.public.iastate.edu/~bkh/teaching/505/arden_buck_sat.pdf}}</ref> Arden Buck presentspresenta severalvarios differentconjuntos valuationde setsvaloración diferentes, withcon differentdistintos maximumerrores errorsmáximos forpara differentdiferentes temperaturerangos rangesde temperatura. TwoDos particularconjuntos setsconcretos provideproporcionan aun rangerango ofde −40&nbsp;°C toa +50&nbsp;°C betweenentre thelos twodos, withcon evenun lowererror maximummáximo erroraún menor withindentro thedel indicatedrango rangeindicado thanque alltodos thelos setsconjuntos aboveanteriores:
*''a'' = 6.1121&nbsp;mbar, ''b'' = 17.368, ''c'' = 238.88&nbsp;°C; for {{nowrap|0 °C ≤ ''T'' ≤ 50&nbsp;°C}} (error ≤ 0.05%).
*''a'' = 6.1121&nbsp;mbar, ''b'' = 17.966, ''c'' = 247.15&nbsp;°C; for {{nowrap|−40 °C ≤ ''T'' ≤ 0&nbsp;°C}} (error ≤ 0.06%).
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