Flesch Reading Ease
Flesch Reading Ease uses average sentence length and average syllables per word. Higher scores are easier to read. Short sentences and familiar words usually raise the score.
Flesch-Kincaid Grade
Flesch-Kincaid Grade converts a similar formula into an estimated school grade level. It is useful when you need to keep instructions, support pages, emails, or public information easy to understand.
Gunning Fog
Gunning Fog focuses on sentence length and complex words. It is a useful check for business writing, SEO articles, and technical drafts that may become dense without the writer noticing.
How to improve a difficult score
- Split sentences over 25 words when they carry more than one idea.
- Replace vague abstract nouns with concrete subjects and verbs.
- Keep necessary technical terms, but define them near first use.
- Use short paragraphs, headings, and lists when readers need to scan.
- Check the final draft in the Readability Checker, then read it aloud once.
What scores cannot tell you
Scores cannot know your audience, product category, legal requirements, or brand voice. A technical page can be accurate and still score difficult. Use the score to find where to edit, not to force every sentence into the same pattern.