The literacy rate in India is calculated based on the percentage of the population above the age of 7 years who can read and write with understanding in any language.
This means that anyone aged 7 years and older who can read and write is considered literate when calculating the literacy rate.
This choice of age (7 years) is based on the assumption that by the age of 7, most children should have had the opportunity to start their basic education and acquire at least some fundamental literacy skills.
Using this age threshold helps to provide a more accurate representation of the literacy levels among the population while excluding very young children who may not have had the chance to begin their formal education yet.
It is a standard age threshold used in demographic and educational statistics to measure literacy rates in India and other countries.