Flesch-Kincaid Calculator

What Flesch-Kincaid Calculator is

Flesch-Kincaid Calculator is a web tool for assessing the readability of text, from a short paragraph to a full article. It reports a Flesch Reading Ease score on a 0–100 scale and an estimated U.S. school grade level. Its results also include sentence and word counts, syllables, and average sentence length, with recommendations aimed at improving readability for a target audience. The site says analysis happens in real time in the browser and submitted text is discarded immediately rather than stored or transmitted. If you create a shareable link, the linked analysis scores and metrics are retained for one year, but the original text is not. The privacy policy says PostHog analytics may collect usage, device, browser, and session recording information if enabled. The calculator is free, requires no signup, and has no stated usage limit. It is described as useful for content teams, educators, agencies, and public-sector writers. The site also links to other readability calculators, including SMOG, Gunning Fog, Dale-Chall, ARI, Coleman-Liau, Linsear Write, Lix, and Rix.

Who it suits

It suits content teams, educators, agencies, and public-sector writers who want readability scores and recommendations for an intended audience. It can also help anyone reviewing text length and sentence-level metrics in a browser.

Getting started

1. Open https://flesch-kincaid-calculator.com/ in a web browser.
2. Paste a paragraph or article into the calculator.
3. Review the readability score, grade estimate, and additional metrics.
4. Use the recommendations to revise text, or create a shareable link if needed.

Verdict

Choose Flesch-Kincaid Calculator if you need free browser-based readability scores, basic text metrics, and audience-focused recommendations without signing up. Look elsewhere if you need a stated absolute security guarantee or do not want linked analysis metrics retained for a year when sharing results.