Mathcad 15 - Preferred units in results?

I am using Mathcad 15 for a course in Quantum Chemistry. Is there a way to set default units so that they match those commonly accepted in the dicipline?

For instance, when I calculate wavenumber, my result is in m^-1 rather than the commonly accepted cm^-1, and frequency is in s^-1 rather than Hz.

Thanks.

Best Regads,

Matthew