Flesch-Kincaid Calculator

About Flesch-Kincaid Calculator

Writing that's technically correct can still be hard to read if sentences run long and words get needlessly complex — and it's genuinely difficult to judge your own writing's readability just by re-reading it, since you already understand what you meant to say. Readability scoring gives an objective, numeric answer instead of a gut feeling.

This tool calculates the Flesch Reading Ease score, a widely used readability formula based on average sentence length and average syllables per word — higher scores mean easier reading, roughly on a 0-100 scale, where 60-70 is considered easily understood by most adult readers and scores below 30 indicate genuinely dense, academic-level writing. It also shows the corresponding Flesch-Kincaid Grade Level, an estimate of the US school grade level needed to comprehend the text on first read.

Alongside the two headline scores, the tool shows word count, sentence count, and average words per sentence — often the single biggest lever for improving readability, since breaking up long sentences typically does more for reading ease than swapping individual words. This is a mechanical, formula-based measure of structural readability; it doesn't judge clarity of argument, tone, or whether the content is actually correct, just how demanding the sentence and word structure is to parse.

How it works

1. Paste your text. Paste an article, blog post, or any block of writing.
2. Read the score. See the Flesch Reading Ease score and what it means for your audience.
3. Check the supporting stats. Word count, sentence count, and average sentence length help pinpoint what to shorten.