Look at your SAT score report. Locate your score for each of the three sections, critical reading, writing and math.
Sum the scores from step 1. For example, if you score 650 on the critical reading section, 700 on the writing section and 550 on the math section, then your summed score should be 1900.
Check your combined score to ensure that it ranges from the minimum score of 600 to the maximum score of 2400. If it does not fall within this range then you have miscalculated and should check steps 1 and 2.