You are able to access your simulation's reference values using Ansys Fluent's web interface.

 Setup → Reference Values

From here, you can create new reference values or view and make changes to existing reference values that are available in your session, such as area, density, enthalpy, length, pressure, and so on. The available settings are similar to those found in the standard Fluent solver. For more detailed information about them, see Reference Values Task Page.