Readability Checker — Flesch-Kincaid Score & Grade Level
— Flesch Reading Ease —
— Grade Level Flesch-Kincaid
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Paste any English text to see its Flesch Reading Ease score and Flesch-Kincaid grade level — the two most widely used readability measures. The tool also reports word count, sentence count, syllables, and average sentence length, so you know exactly where to simplify.
How it works
- 1 Paste your text Click the text area and paste any article, email, essay, or document. The analysis starts the moment you stop typing.
- 2 Read the Flesch score The Flesch Reading Ease score runs from 0 to 100. Higher is easier: 60–70 is plain English, 80+ is easy reading, below 30 is very academic or technical text.
- 3 Check the grade level The Flesch-Kincaid grade level maps your text to a US school grade. A score of 8 means the text is readable by an 8th grader. Most web content aims for grade 6–8.
Your data stays private
All processing happens entirely in your browser. No files, text, or data are ever sent to our servers. You can disconnect from the internet and this tool will still work.
Frequently asked questions
- What is the Flesch Reading Ease score?
- A score from 0 to 100 that measures how easy a text is to read. It's calculated from average sentence length and average syllables per word. 60–70 is considered plain English. Lower scores mean denser, harder-to-read text.
- What is the Flesch-Kincaid grade level?
- A US school grade equivalent for the text's difficulty. A score of 8 means an 8th grader can comfortably read it. Most news articles and popular websites target grades 6–8 to reach the widest possible audience.
- Why does the score matter for my writing?
- Readers abandon text that feels too dense. Studies show that even educated audiences prefer plain language — it's faster to process and easier to remember. Checking your score helps you spot overlong sentences and unnecessary jargon before publishing.
- Is this tool accurate for non-English text?
- The Flesch formula was designed for English and uses English syllable counting heuristics. Results for other languages may be inaccurate. For English text the scores closely match the original published formula.
- What syllable count method does this tool use?
- Each word's syllables are estimated by counting vowel groups (a, e, i, o, u, y) and subtracting silent trailing 'e'. This matches the heuristic used in most readability software and is accurate enough for the formula's precision.
- Does my text leave my device?
- No. Everything runs in your browser using JavaScript. Your text is never sent to a server, never logged, and never stored anywhere.