Pitzer

Gaussian is a very popular general purpose electronic structure program. Recent versions can perform density functional theory, Hartree-Fock, Möller-Plesset, coupled-cluster, and configuration interaction calculations among others. Geometry optimizations, vibrational frequencies, magnetic properties, and solution modeling are available. It performs well as black-box software on closed-shell ground state systems. 

The XDMoD tool at xdmod.osc.edu can be used to get an overview of how accurate the requested time of jobs are with the elapsed time of jobs.

To request an amount of time for a job, you can use the following header.

#SBATCH --time=xx:xx:xx

The elapsed time is how long the job ran for before completing. This can be obtained for completed jobs using the  sacct command.