given the that the size of the galaxy is ~100,000 ly from one side to the other and given the average jump range is ~ 9.7 it would take 10,204 jumps give or take a few. to jump takes 5 seconds to spool up/cool down is 40 seconds and to refuel (if you have a fuel scoop) is ~1 minute so lets say every jump takes around 2 1/2 minutes that would take you 25,510 minutes, 425 hours or 17 days of constant jumping/refueling. This is just a rough estimate and does not take into account sectors with large gaps between stars and this is as the crow flies.