For the four compulsory sections, the raw score is converted to a scaled score from 1-36. Your overall ACT score is the average of each of the four section scores and will also have a range of 1-36. The scaled scores allow for consideration of the difficulty of each test, as some tests might be harder than others. Therefore, you should also evaluate your score with respect to the percentile you fall under.
The essay score is provided separately. Your is scored by two different graders on a scale of 1-6 across four different domains, for a total score out of 12 in each domain. To obtain the overall essay score, the four domain scores are then averaged into a total score out of 12.