The SMOG Readability Formula
Step 1: Take the entire text to be assessed.
Step 2: Count 10 sentences in a row near the beginning, 10 in the middle, and 10 in the end for a total of 30 sentences.
Step 3: Count every word with three or more syllables in each group of sentences, even if the same word appears more than once.
Step 4: Calculate the square root of the number arrived at in Step 3 and round it off to nearest 10.
Step 4: Add 3 to the figure arrived at in Step 4 to know the SMOG Grade, i.e., the reading grade that a person must have reached if he is to understand fully the text assessed.