School starting age, primary school - country data from around the world:
The average for 2016 was 6 years.The highest value was in Bulgaria: 7 years and the lowest value was in Ant.& Barb.: 5 years. Below is a chart for all countries where data are available for: School starting age, primary school.
Definition: Age at which students would enter primary education, assuming they had started at the official entrance age for the lowest level of education, had studied full-time throughout and had progressed through the system without repeating or skipping a grade.