How to check readability
Paste an English draft into the box above. The results update as you type. For a more useful estimate, check at least 30 words from a complete passage rather than a heading or a list of keywords. Edit a sentence, then see how the measurements change.
What the scores mean
Flesch Reading Ease combines average sentence length and estimated syllables per word. Higher scores usually indicate easier reading. Scores around 60 to 70 are often described as standard English; technical writing can score lower without being inappropriate for its audience. The raw formula can produce results below zero or above 100.
Flesch-Kincaid grade level estimates a US school grade. A lower grade suggests simpler wording and shorter sentences. Neither score measures factual accuracy, usefulness, tone, or how well your reader understands the subject.
Make your draft easier to follow
- Give each sentence one main job.
- Use familiar words when they express the same idea accurately.
- Break long passages into sections with descriptive headings.
- Explain specialist terms and keep examples close to the idea they explain.
How accurate is this checker?
These are estimates for English prose. Syllables are counted with a spelling-based heuristic rather than a pronunciation dictionary, and sentence boundaries are inferred from punctuation. Names, abbreviations, decimals, and unusual words can affect the result. Very short passages and other languages are not reliable inputs. Reading time assumes 200 words per minute.
The formulas used are: Reading Ease = 206.835 - 1.015 × words per sentence - 84.6 × syllables per word; grade level = 0.39 × words per sentence + 11.8 × syllables per word - 15.59.
Is my text stored?
No. This tool calculates results in your browser. It does not upload or save the text you enter. Clear the text when you finish, especially on a shared device.