Simple help text
Enter your numbers, press calculate, and read the answer.About grade 6.3, reading ease 66.1, no sentences over 20 words, and 2 long words
Reading Level Checker
Paste English text to calculate Flesch-Kincaid grade and reading ease, flag sentences over 20 words, and find the longest sentence to review in your browser.
English formula checksNo text uploadLongest sentence firstRevision clues
Browser-only formulas
Reading Level Checker
Estimate English reading grade and find the first sentence to review.
Examples
Recent results
Run the tool to keep a short in-tab history. Nothing is saved to an account.
Readability scoring runs locally with formulas. No server model is needed.
The English formula is an editing signal, not an accessibility or school-placement test.
No upload to Access Free Tools. No account needed.
How to use the Reading Level Checker
- Paste at least 40 characters of English prose from the page, note, or message you want to review.
- Press Check reading level to calculate grade, reading ease, sentence length, and long-word signals.
- Start with the longest sentence shown and check whether it contains more than one main idea.
- Edit the same passage and run it again, while keeping names and necessary technical terms when readers need them.
What people use it for
Find the longest sentence in a help article before publishing.
Check whether a support reply has sentences over 20 words.
Compare the same 300-word draft before and after splitting long sentences.
Review jargon and long-word share in school notes, instructions, or onboarding text.
Quick examples
Long support sentence
Paste a support reply with one sentence longer than 20 words.The longest sentence appears first with its word count and a split-or-shorten clue
Technical paragraph
Paste a jargon-heavy paragraph about implementation details.Grade and reading-ease estimates plus long-word count and share
Need the guide or a nearby tool?
Need a slower walkthrough, a related tool, or the full library? These links keep you close to the task you started.
- How to use the Reading Level CheckerSee slower examples, input meanings, formula notes, result limits, and mistakes to avoid.
- AI ToolsBrowse related calculators and utilities in the same category.
- Browser AI Tools HubCompare this with the nearby tools and checks in the same job path.
- Tool and utility guidesFind more guides that use real tool inputs, examples, mistakes, and result notes.
- All free toolsSearch every live tool, converter, calculator, AI helper, and browser utility.
Frequently asked questions
Plain-language answers about English formulas, sample size, sentence checks, privacy, and what the scores cannot prove.
What formulas does the Reading Level Checker use?
It uses the Flesch-Kincaid grade formula and Flesch Reading Ease. Both use average sentence length and estimated English syllables per word. The page shows the exact equations after each check.
How should I read the grade level and reading-ease scores?
Treat grade level as an estimate of English text difficulty. Higher reading-ease scores usually mean easier scanning. Double-check the wording with your real audience because neither score measures accuracy, usefulness, tone, layout, or subject knowledge.
What do the main Reading Level Checker inputs mean?
The main inputs are the text or image you want the browser AI helper to check. Keep sensitive information out unless it is truly needed, and remember that model or language files may download only after you press the action button.
Why does the tool flag sentences over 20 words?
The 20-word mark is an editing checkpoint based on current CDC plain-language guidance to aim for about 20 words per sentence. A longer sentence can still be clear, so review the idea and wording before you split it.
What should I double-check before trusting the Reading Level Checker?
Check short inputs, blurry images, sarcasm, mixed-language text, low confidence scores, and important names or numbers yourself. Browser AI can be useful and still be wrong.
How does the tool choose the first sentence to review?
It counts the words in each detected sentence and shows the longest one first. This gives you a concrete place to start, but jargon, missing context, poor order, and weak examples can matter more than sentence length.
Does a lower grade level always make writing better?
No. Keep necessary names, legal terms, medical terms, product names, and technical vocabulary when your reader needs them. Explain unfamiliar terms and improve the surrounding sentence instead of chasing the lowest number.
Can I use this checker for languages other than English?
Not reliably. The syllable estimate and formulas on this page are designed for English prose. Mixed-language text, abbreviations, names, numbers, code, and URLs can distort the score.
Does this score prove that my page is accessible?
No. This is not an accessibility certificate. A readability formula is one signal; accessibility also depends on the audience, structure, headings, definitions, examples, images, supplemental explanations, and assistive technology.
Does the Reading Level Checker upload my text?
No. The formulas and sentence checks run in your browser tab. Your text is not uploaded to Access Free Tools, and no model download is needed for this checker.