Is there an easy way for me to determine where I can find the highest percentage refine rates for ore from any given K-space location without having to visit each citadel in order to see what % refuine rate I get?
Also is there a calculator that will show me if it is better to buy ore or minerals dependent on the refine rate that i can get
Nope, as the values really only differ if they are using rigs. Some will advertise having rigs though it the name. Tataras generally have a good chance at having that rig though.
I am not familiar with there being a calculator, however compressed ore tends to sell well as that’s the easiest way to transport it and null will have better reprocessing values.