Side by side
Flesch-Kincaid Calculator vs Readability Formulas
Both stand on readability checkers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
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.
Visit Flesch-Kincaid Calculator
Readability Formulas offers scoring, editing, statistics, and batch tools for English text, including a browser extension. Its privacy policy says submitted text is processed locally and not stored on a server.
Visit Readability FormulasThe facts
| Flesch-Kincaid Calculator | Readability Formulas | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Web | Extension, Mac, Web, Windows |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 1 |
| Maker | Not published | Not published |
| Website | flesch-kincaid-calculator.com | readabilityformulas.com |
| On readability checkers | #14 of 25 | #10 of 25 |
Flesch-Kincaid Calculator: what it does well
- Scores Reading Ease and estimated U.S. school grade level.
- Reports word, sentence, and syllable counts.
- Provides recommendations for a target audience.
- Free to use without signup or a stated usage limit.
- Analysis text is discarded immediately, according to the site.
What to know first
- Shareable links retain scores and metrics for one year.
- Enabled PostHog analytics may collect device and session information.
- The site does not guarantee absolute security.
Readability Formulas: what it does well
- Scores text with a broad set of readability formulas.
- Accepts pasted text and five file formats.
- Reports sentence, syllable, and other text statistics.
- Browser extension can score highlighted website text.
What to know first
- Readability scoring supports English-language text.
- Editor and batch processing are marked beta.
- Synonym Finder may transmit one word at a time to Datamuse.
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