English Grammar: Lexical Density Test
Lexical Density = (Number of different words / Total number of words) x 100
The lexical density of a text tries to measure the proportion of the content (lexical) words over the total words. Texts with a lower density are more easily understood.
As a guide, lexically dense text has a lexical density of around 60-70% and those which are not dense have a lower lexical density measure of around 40-50%.