Readability Formulas
Readability Formulas: A mature readability toolkit for writers, editors, educators, and content teams. Ranked #5 of 25 in Readability Checkers by our editors (8.6/10); pricing: Free plan; best for mature multi-formula readability analysis.
At a glance
- Editor score8.6 / 10
- PricingFree plan
- Best forMature multi-formula readability analysis
- Free planYes
- Founded1996
- Facts checked20 Sep 2026
Where it wins
- Combines multiple readability formulas with consensus scoring.
- Includes hard-word, wordiness, and detailed text statistics.
- Supports batch processing, file imports, graphs, and browser scoring.
Where it doesn't
- Language support is focused on English.
- The product centers on analysis rather than broader writing workflows.
- Readability Calculations and Readability PLUS are separate software offerings.
Our verdict on Readability Formulas
Readability Formulas is a readability analysis toolkit for writers, editors, educators, marketers, healthcare providers, and government agencies. It evaluates text difficulty, reading grade level, sentence length, word usage, and comprehension requirements across web, Windows, macOS, and Chrome extension environments. The product supports formulas including Flesch-Kincaid, Gunning Fog, SMOG, Dale-Chall, Fry, Raygor, and Spache, giving teams several ways to assess English-language content.
Its free plan and free online tools make it accessible for occasional checks, while the browser extension can score highlighted text on websites. The analysis set is broader than a basic grade-level calculator: users can review sentence, word, syllable, and character statistics; calculate an Average Reading Level Consensus; inspect hard words and wordiness through the Robert Gunning Editor; and process multiple texts in batches. File import covers text, PDF, Word, and HTML documents, while Fry and Raygor graphs add visual perspectives to the results.
The main trade-off is focus. Readability Formulas is designed to measure and diagnose text difficulty, not to serve as a general writing, editing, or content-management workspace. Its English-language scope also makes it a better fit for English content than multilingual publishing teams. Choose it when formula variety, detailed statistics, hard-word analysis, document imports, and browser-based scoring matter. Look elsewhere if you need a broader writing workflow or analysis across multiple languages.
Your product? Our editors can test Readability Formulas in depth and publish a review, labelled as paid · from $149/mo →
Readability Formulas pricing
Readability Formulas fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Readability formulas | Not verified |
| Sentence analysis | Yes |
| Clarity recommendations | Yes |
| Browser extension | Yes |
| API access | Not verified |
| Language support | English |
| Deployment | Cloud, Desktop, Browser extension |
| Platforms | Web, Windows, macOS, Chrome extension |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan (source) |
| Website | readabilityformulas.com |
| Facts checked | 20 Sep 2026 |
Alternatives to Readability Formulas
- Eclipse Readability StudioA free, open-source desktop checker for detailed multilingual document analysis.9.4
- ReadableA deep web and document readability checker for professional content teams.9.2
- Check ReadabilityA free browser checker combining nine formulas with practical clarity guidance.9.0
See all Readability Formulas alternatives →
Readability Formulas vs the competition
- Readability Formulas vs Eclipse Readability Studio
- Readability Formulas vs Readable
- Readability Formulas vs Check Readability
- Readability Formulas vs ProWritingAid
- Readability Formulas vs Text Inspector
- Readability Formulas vs Slick Write
Compare Readability Formulas with any tool side by side →
Also Ranked In
Readability Formulas is ranked in 2 of our directories.
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Featured on iTechGuides
Readability Formulas is listed in our Readability Checkers directory. Add the badge to your site — it links back to this page.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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