The Flesch-Kincaid Grade Level converts your writing into a single US school grade number, so a result of 8 means an average eighth grader can read the text comfortably. It is one of the most trusted readability formulas and is built into word processors and used by governments to keep public documents clear. This calculator applies the exact formula, 0.39 times average words per sentence plus 11.8 times average syllables per word minus 15.59, and counts syllables with a reliable English heuristic. Aim for grade 8 or lower for general web content, marketing and email, and grade 12 or lower for professional writing. Paste any passage and the grade updates as you type. All processing happens locally in your browser, so your content stays private and nothing is uploaded to a server.
It estimates the US school grade someone needs to read your text, so a result of 8 means an average eighth grader can follow it.
Both use sentence length and syllables, but Reading Ease gives a 0 to 100 score while the grade level maps directly to a school grade.
Use shorter sentences and fewer multi-syllable words, since both push the grade level down.
The Flesch-Kincaid Grade Level converts your writing into a single US school grade number, so a result of 8 means an average eighth grader can read the text comfortably. It is one of the most trusted readability formulas and is built into word processors and used by governments to keep public documents clear.
Yes. Flesch-Kincaid Grade Level Calculator is completely free, with no sign-up and no usage limits.
Yes. Flesch-Kincaid Grade Level Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Flesch-Kincaid Grade Level Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.