Best is to wire your program using the units feature of LabVIEW. This is one of the least utilized jewels in labVIEW.
Assign pertinent units to controls and anunciators. You do not have to worry anywhere in your program about unit conversion factors or about wiring incompatible parameters.
Unit conversion is performed automatically even when not in RUN mode.
In the front panel, leave visible the units of those elements you want the user to be able to change.
Take care!