No, and the reason is that the measurement is not a "snapshot" pressure observation. By snapshot, I mean an instantaneous measurement. For example, CUP uses a copper slug that is compressed over the duration of the pressure event. It is not possible to convert to PSI because the pressure was never measured. The effects of pressure over a period of time caused the copper slug to be deformed, but the pressure is not known and cannot be inferred from measuring the slug.