Readability Score Calculator
Practice and calculate readability score with our free tool. Includes worked examples, visual aids, and learning resources.
Formula
Flesch = 206.835 - 1.015(words/sentences) - 84.6(syllables/words)
Flesch Reading Ease: 90-100=very easy (5th grade), 60-70=standard (8th grade), 30-50=college, 0-30=professional.
Frequently Asked Questions
What is the Flesch-Kincaid readability score?
The Flesch-Kincaid Reading Ease score (0–100) measures how easy text is to read — higher scores mean easier reading. The grade-level variant estimates the US school grade needed to understand the text. Scores are calculated from average sentence length and average syllables per word. General audiences need a score of 60–70 (8th–9th grade level).
How do I improve the readability score of my writing?
To improve readability: use shorter sentences (aim for 15–20 words average), choose simpler words (use 'use' not 'utilize'), break up long paragraphs, use subheadings and bullet points, avoid jargon unless writing for specialists, and use active voice. Hemingway App and similar tools provide real-time readability feedback as you write.
Is my data stored or sent to a server?
No. All calculations run entirely in your browser using JavaScript. No data you enter is ever transmitted to any server or stored anywhere. Your inputs remain completely private.
What formula does Readability Score Calculator use?
The formula used is described in the Formula section on this page. It is based on widely accepted standards in the relevant field. If you need a specific reference or citation, the References section provides links to authoritative sources.
Does Readability Score Calculator work offline?
Once the page is loaded, the calculation logic runs entirely in your browser. If you have already opened the page, most calculators will continue to work even if your internet connection is lost, since no server requests are needed for computation.
Can I share or bookmark my calculation?
You can bookmark the calculator page in your browser. Many calculators also display a shareable result summary you can copy. The page URL stays the same so returning to it will bring you back to the same tool.