Free Readability Score Checker — Flesch Reading Ease & Grade Level

A readability score is a numerical measure of how easy or difficult a piece of text is to read and understand. Multiple readability formulas exist, each producing a different type of score — but they all analyse features of your text like word length, sentence length, and syllable count to arrive at an objective measure of reading complexity.

The two most widely used readability measures are the Flesch Reading Ease score and the Flesch-Kincaid Grade Level. These were developed by Rudolf Flesch and J. Peter Kincaid in the mid-twentieth century and remain the industry standard for readability analysis in publishing, education, healthcare, and legal writing.

Readability scores help writers understand how accessible their content is to a target audience. A readability checker does not judge the quality of your ideas — it measures how effortlessly a reader can decode the words on the page. Combined with a word counter, readability analysis gives you a comprehensive picture of your writing’s effectiveness.

Readability affects every type of writing — from blog posts to academic papers to legal contracts. Here is why checking your readability score before publishing matters:

Reader Comprehension and Engagement

Studies consistently show that readers engage more deeply with content they can read easily. When text requires too much cognitive effort to decode, readers skim, miss key points, or abandon the content entirely. Writing for your audience’s reading level — rather than showing off vocabulary — leads to higher engagement and better outcomes.

SEO and Search Rankings

Google’s documentation on helpful content explicitly references readability and user experience. While Google does not directly publish a “readability ranking factor,” pages with better readability tend to generate lower bounce rates, higher time-on-page, and more social shares — all signals that correlate with better search rankings. Checking your readability score before publishing is a simple SEO hygiene step.

Accessibility and Plain Language

Government agencies, healthcare providers, and financial institutions are often legally required to publish documents in plain language accessible to the general public. In the US, the Plain Writing Act mandates clear communication in federal documents. A readability checker is an essential tool for compliance with plain language standards.

Getting your readability score is quick and requires no setup:

1. Paste or type your text into the editor. The readability score updates automatically as you write — no need to click a button.
2. Review your Flesch Reading Ease score. A score of 60–70 is ideal for most web content. Scores below 30 indicate very complex text (academic journals, legal documents); scores above 80 indicate simple, easily accessible writing (children’s books, casual blogs).
3. Check the grade level to understand what education level your text targets. Most general audience content aims for grade 6–8 (roughly 11–14 years old).
4. Revise to improve your score by shortening sentences, replacing complex words with simpler alternatives, and breaking long paragraphs into smaller chunks.

After improving your readability, use our reading time calculator to estimate how long your revised text will take to read.

The Flesch Reading Ease formula produces a score between 0 and 100. Here is how to interpret the scale:

Most general audience online content should aim for a score between 60 and 70. Marketing copy often targets 70+ for maximum accessibility. If your score is below 50, look for opportunities to simplify — shorter sentences and common words go a long way.

Writers sometimes confuse readability checkers with grammar checkers. They solve different problems.

A grammar checker catches errors — spelling mistakes, incorrect verb tenses, punctuation issues, and rule violations. It tells you when something is wrong in your text according to the rules of the language.

A readability checker measures difficulty — it analyses how easily a reader can process your text, regardless of whether it is grammatically correct. A perfectly grammatical sentence can still be extremely hard to read if it is 60 words long with 5-syllable vocabulary throughout.

Both tools are valuable, but they answer different questions. Use a grammar checker to catch mistakes; use a readability checker to evaluate and improve clarity. Our character counter complements both by helping you manage length for platform-specific constraints.