Readability Checker
Check text readability with Flesch Reading Ease and Flesch-Kincaid Grade Level scores. Improve your writing clarity.
About this calculator
Paste your text and get its Flesch Reading Ease score and Flesch-Kincaid Grade Level, along with the sentence count, word count and average sentence length. Use the numbers to make writing clearer.
The page is useful for blog posts, student essays, policy documents and website copy. Readers skim online, so a score of 60 or more keeps them with you.
How to use it
- Paste your text.
- Press Analyze Readability.
- Read the scores and the guidance.
Formulas
Flesch Reading Ease = 206.835 − 1.015 × (words ÷ sentences) − 84.6 × (syllables ÷ words). Scores run from 0 (very hard) to 100 (very easy): 60 to 70 is plain English, 30 to 50 is difficult and below 30 is very difficult. Flesch-Kincaid Grade = 0.39 × (words ÷ sentences) + 11.8 × (syllables ÷ words) − 15.59 and estimates the US school grade needed to follow the text.
Worked example
The cat sat on the mat. It was a sunny day.
| Words / sentences | 12 / 2 |
| Reading Ease | very high (above 90): easy for a child |
Everything runs in your browser. Your text is not uploaded or stored.
Tips and common mistakes
- Aim for a Reading Ease of 60 or more for general web content.
- Shorter sentences and shorter words lift the score fastest.
- Replace jargon with everyday words.
- Break long paragraphs.
- Readability scores measure form, not meaning, so a human edit is still needed.
Frequently asked questions
What is Flesch Reading Ease?
A score from 0 to 100 where higher means easier to read.
What is a good score?
60 to 70 is standard plain English.
What is the Flesch-Kincaid Grade Level?
The US school grade needed to understand the text.
How do I improve readability?
Use shorter sentences and simpler words.
Does it work for Hindi?
No. The formulas are designed for English.
Why is my score low?
Long sentences or many long words.