Is 109 good on an IQ test?

100 is the average IQ. The average for every age is 100. It is worked out based on one's peers' score. If your IQ is 109 in your teens, it is likely to be close to that score or at that score when older.

An IQ of 109 is within the average range. The average range is between 85 and 115. 68% of people fall within this range.

(This is based on an IQ worked out with a standard deviation of 15, most modern tests performed use this. The majority of professionally administered IQ tests today are the Wechsler adult intelligence scale and the Wechsler Intelligence scale for Children.)