Stands for Simple Measure of Gobbledygook. It estimates the years of education the average person needs to understand a piece of writing.

Formula

$$grade = 1.0430\sqrt{number\ of\ polysyllables \times \frac{30}{number of sentences}}+ 3.1291 $$

Scores

Total Number of Polysyllabic Words	School Level	Comprehension
0-2	4th Grade	Very easy to read
3-6	5th Grade	Very easy to read
7-12	6th Grade	Easy to read
13-20	7th Grade	Fairly easy to read
21-42	8th & 9th Grade	Conversational English
43-56	10th Grade	Fairly difficult to read
57-72	11th Grade	Fairly difficult to read
73-90	12th Grade	Fairly difficult to read
91-110	College Freshman	Difficult to read
111-132	College Sophomore	Difficult to read
133-156	College Junior	Difficult to read
157-182	College Senior	Difficult to read
183-210	College Graduate	Very difficult to read
211+	Professional	Extremely difficult to read