The IELTS exam is scored on a 9-band scale, with 9 being the highest score and 0 being the lowest score. The overall IELTS score is calculated by averaging the scores of the four sections: Reading, Writing, Listening and Speaking. Each of these sections is scored on a band scale from 0 to 9. The 9-band scale is used to provide a consistent and standardized way of assessing language ability. It is designed to reflect the full range of language proficiency, from non-user (band 0) to expert (band 9). The scores are divided into nine bands, and the scores within each band are evenly distributed. For example, a score of 6.5 on the IELTS exam indicates that the individual's English language ability is at the high end of the band 6 range and is approaching the low end of the band 7 range. A score of 7.5, on the other hand, indicates that the individual's English language ability is at the high end of the band 7 range and is approaching the low end of the band 8 range. It is important to note that the IELTS exam is designed to be challenging, and a high score is not easy to achieve. A score of 7 or higher is generally considered to be good, and many universities and organizations have their own specific requirements for IELTS scores. It is a good idea to research the IELTS score requirements of the universities or organizations you are interested in to understand what is expected of you.