Among the most popular tests, the Wechsler, Cattell and Stanford-Binet tests, the average IQ is designed to be a score of 100. While a score of 100 would make you perfectly average, in general, a score within 90-110 is seen as average.
These tests are created so that the scores fall along a standard distribution, or bell curve, where the majority of scores cluster around the middle and become fewer and fewer the farther away you get from the average. The bell curve below illustrates the scoring curve for the Wechsler test.