Reading Level Checker
Check the reading level of your text
Paste English text to calculate Flesch Reading Ease, Flesch–Kincaid Grade, Gunning Fog and SMOG.
What does the checker measure?
Four complementary views create a multidimensional readability profile. See overall ease, grade level, sentence rhythm and vocabulary richness at once.
- Flesch Reading Ease: higher scores are generally easier; 60–70 is commonly treated as standard prose.
- Flesch–Kincaid Grade: converts sentence length and syllables into an approximate US school grade.
- Gunning Fog: emphasizes sentence length and the percentage of words with three or more syllables.
- SMOG: estimates grade from polysyllabic words; it needs at least three sentences and benefits from longer samples.
How to use readability scores when editing
- Define the real audience: students, general customers or specialists.
- Find unusually long sentences instead of shortening every sentence.
- Replace jargon when an equally precise familiar word exists; keep necessary terms and explain them.
- Analyze again, then read aloud to combine the score with the natural rhythm of the prose.
Every goal has its own sweet spot: an introductory guide benefits from ease, while expert content can confidently keep rich vocabulary. The best result keeps the right reader moving.
Inside the readability engine
The syllable engine applies English patterns and instantly turns a passage into an editing dashboard. Proper names, abbreviations and unusual pronunciations are useful spots to revisit during the final polish.
Rudolf Flesch, A New Readability Yardstick is the original source for the Flesch Reading Ease measure.
Frequently asked questions
What is a reading level?
A reading level turns sentence length and word complexity into an intuitive picture of the reading experience, helping you tune a draft for its intended audience.
How much text should I paste?
At least 100 words and several complete sentences produce a more useful estimate; 200 or more words reduce the influence of one unusual sentence or word.
What does Grade 8 mean?
It is a quick way to picture sentence and vocabulary patterns commonly readable at US Grade 8. Combine it with the real topic and audience for a sharper edit.
What can I learn from Vietnamese text?
You immediately get word count, sentence count, sentence length and reading time. Flesch, Fog and SMOG shine brightest in English; the statistics dashboard remains useful for Vietnamese editing.