Readability Formulas Test Calculator

Check Readability Score for text document using the calculator to know what grade level is your writing/reading.

Check Reading/Writing Levels & Grades

After calculating score in above tool, you can convert the result in grade using the tables below.

Automated Readability Index

Score School Level Age
1 Kindergarten 5-6
2 1st & 2nd Grade 6-7
3 3rd Grade 7-9
4 4th Grade 9-10
5 5th Grade 10-11
6 6th Grade 11-12
7 7th Grade 12-13
8 8th Grade 13-14
9 9th Grade 14-15
10 10th Grade 15-16
11 11th Grade 16-17
12 12th Grade 17-18
13 College Student 18-24
14 Professor 24+

Coleman-Liau Index

Index Score School Level Comprehension
5 & below 5th Grade and below Very easy to read
6 6th Grade Easy to read
7 7th Grade Fairly easy to read
7-10 8th, 9th & 10th Grade Conversational English
11-12 11th & 12th Grade Fairly difficult to read
13-16 College Difficult to read
17+ Professional Extremely difficult to read

Flesch-Kincaid Grade Level

Score School Level Comprehension
5.0-5.9 5th Grade Very easy to read
6.0-6.9 6th Grade Easy to read
7.0-7.9 7th Grade Fairly easy to read
8.0-9.9 8th & 9th Grade Conversational English
10.0-12.9 10th , 11th & 12th Grade Fairly difficult to read
13.0-15.9 College Difficult to read
16.0-17.9 College Graduate Very difficult to read
18.0+ Professional Extremely difficult to read

Flesch-Kincaid Reading Ease

Score School Level Comprehension
100.0-90.0 5th Grade Very easy to read
90.0-80.0 6th Grade Easy to read
80.0-70.0 7th Grade Fairly easy to read
70.0-60.0 8th & 9th Grade Conversational English
60.0-50.0 10th , 11th & 12th Grade Fairly difficult to read
50.0-30.0 College Difficult to read
30.0-10.0 College Graduate Very difficult to read
10.0-0.0 Professional Extremely difficult to read

Gunning-Fog Score

FOG Score School Level Comprehension
0-5 5th Grade and below Very easy to read
6 6th Grade Easy to read
7 7th Grade Fairly easy to read
8 8th Grade Conversational English
9-12 9th & 12th Grade Fairly difficult to read
13-16 College Difficult to read
17 College Graduate Very difficult to read
18-20 Professional Extremely difficult to read

New Dale-Chall Score

New Dale-Chall Score School Level Comprehension
4.9 or lower 4th Grade and below Very easy to read
5.0-5.9 5th & 6th Grade Easy to read
6.0-6.9 7th & 8th Grade Conversational English
7.0-7.9 9th & 10th Grade Conversational English
8.0-8.9 11th & 12th Grade Fairly difficult to read
9.0-9.9 College Difficult to read
10.0+ College Graduate Very difficult to read

Raygor-Estimate & Fry Graph

Plotted Dot shows the estimate grade level.

SMOG Index

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

Spache Readability Score

Spache Readability Index Level outputs the US Grade Level. So you want to aim for a score of 3 or below.

Text Statistics

Character Count
Letter Count
Word Count
Unique Word Count
Sentence Count
Paragraph Count
Syllable Count
Average Word length
Average Syllables / Word         
Average Words/Sentence
Average Chars/Sentence
Average Sentence/Paragraph
Trisyllabic Words
% of Trisyllabic Words
Reading Time
Speaking Time
Writing Time

Text Facts

Longest Sentence Words (Length)         
Shortest Sentence Words (Length)

Fry Readability Formula Graph

Raygor Estimate Graph

Keyword Density

Word Density (%)