Credits

Credits are the basic unit of commerce when it comes to either higher-value dealings or simply deals within the core worlds or military. They are only popular in these places for the rather simple fact that they are much easier to redeem, much more frequently used, and thought of as the most basic form of currency. In most other places, other forms of currency would be used by almost everyone and anyone for lower-value transactions. Conversion rates of credits to other 'hard' forms of currency (Dereterium or Catalyst Ingots being the most popular) are in constant flux, but generally fall into a relatively small range.

Per gram of Catalyst Ingot the conversion rate is approximately 0.2 Credits/Gram  (99.999%)

Per gram of Dereterium Ingot the conversion rate is approximately 20 Credits/Gram  (10.000%)