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#### 2010

Constants used in Gaussian 16, taken from [Mohr12, Mohr12a] and references therein. This is the default.

#### 2006

Constants used in Gaussian 09, taken from [Mohr08] and references therein.

#### 1998

Constants used in Gaussian 03 from [Mohr00] and references therein.

#### 1986

Constants used in Gaussian 88 through Gaussian 98, from [Cohen86, CRC80].

#### 1979

Constants used in Gaussian 80 through Gaussian 86, mostly from [Constyear79].

Current Values

Here are summarized various conversion factors and physical constants used by Gaussian 16 in converting from standard to atomic units. All quantities used in calculations inside Gaussian are in atomic units; the conversion factors are used only when processing input or generating printed output. Values without references are derived from the referenced quantities.

Raw Constants. The constants which are stored directly in the program are:

Conversion Factors. The following useful conversion factors are included for your convenience:

Last updated on: 18 October 2016. [G16 Rev. A.03]