Flesch-Kincaid Calculator
Flesch-Kincaid Calculator is a free web tool for evaluating writing readability.
What Flesch-Kincaid Calculator is
Flesch-Kincaid Calculator is a free web tool for evaluating writing readability. Paste text ranging from a short paragraph to a full article, and it reports Flesch Reading Ease on a 0–100 scale plus an estimated U.S. school grade level. Results also show sentence counts, word counts, syllables, and average sentence length. The site says it provides recommendations for improving readability for a target audience. Submitted text is processed in real time and discarded immediately after analysis rather than stored or transmitted. Creating a shareable link stores the analysis scores and metrics for one year, but not the original text. The calculator requires no signup and has no stated usage limit. It is described for content teams, educators, agencies, and public-sector writers. Related calculators include SMOG, Gunning Fog, Dale-Chall, ARI, Coleman-Liau, Linsear Write, Lix, and Rix.
Good
- Free web access
- No signup required
- Reports multiple readability metrics
- Provides audience-focused recommendations
- No stated usage limit
Watch out
- Shareable links retain metrics for one year
- Optional PostHog analytics may collect session data
- Absolute security is not guaranteed
Who it suits
It suits writers, educators, agencies, content teams, and public-sector professionals checking reading difficulty. It is useful when you want scores and recommendations directly in a browser.
Verdict
Flesch-Kincaid Calculator offers quick browser-based readability scoring with no signup or stated usage cap. Consider its share-link retention and optional analytics when handling sensitive writing.
Plans and prices
From Flesch-Kincaid Calculator's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | No signup required · no stated usage limit |
The facts
Each one read from Flesch-Kincaid Calculator's own pages, with the date it was checked.
What it does
- Additional metrics
- It also reports sentence counts, word counts, syllables, and average sentence length.checked 9 Oct 2026
- Analytics
- The privacy policy says the site uses PostHog analytics, which may collect usage, device, browser, and session recording information if enabled.checked 9 Oct 2026
- Intended users
- The site describes the calculator as useful for content teams, educators, agencies, and public-sector writers.checked 9 Oct 2026
- Readability scores
- The calculator reports Flesch Reading Ease on a 0–100 scale and an estimated U.S. school grade level.checked 9 Oct 2026
- Related calculators
- The site links to calculators for SMOG, Gunning Fog, Dale-Chall, ARI, Coleman-Liau, Linsear Write, Lix, and Rix, among others.checked 9 Oct 2026
- Security
- The site says it implements technical and organizational security measures but does not guarantee absolute security.checked 9 Oct 2026
- Shareable results
- If a user creates a shareable link, the site stores analysis scores and metrics but not the original text, and retains those results for one year.checked 9 Oct 2026
- Text input
- Users can paste text ranging from short paragraphs to full articles for analysis.checked 9 Oct 2026
- Text recommendations
- The site says it provides recommendations to improve readability for a target audience.checked 9 Oct 2026
Where it runs
- Browser processing
- The site says submitted text is processed in real time and discarded immediately after analysis, and is not stored or transmitted.checked 9 Oct 2026
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