Sentence Length Checker
Measure average, shortest, and longest sentence length, then find sentences over a threshold you choose.
Open toolClarity tool
Readability Checker for Essays
See how sentence length and word complexity affect an English draft. Use several established formulas instead of relying on one score alone.
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What this tool checks
A focused signal for your next edit.
Readability formulas convert sentence length and word complexity into comparable signals. They can reveal when a draft has become consistently dense, but they cannot measure the quality, originality, or accuracy of an argument.
01
Flesch Reading Ease
02
Flesch-Kincaid grade level
03
Gunning Fog estimate
Practical uses
Use the result as a review list.
- Compare an early draft with a revised version.
- Find whether long sentences are raising the overall grade level.
- Check instructions, summaries, and explanatory writing for accessibility.
Questions
Before you use the result.
What is a good Flesch Reading Ease score?
Scores around 60 to 70 are generally described as standard English. The right level depends on your audience, subject, and assignment.
Does a lower grade level mean better writing?
Not necessarily. A lower grade level can signal easier reading, but advanced subjects sometimes require specialized vocabulary and more complex relationships.
How much text should I check?
Use at least several complete paragraphs. Very short samples make formula-based results unstable.
Need AI detection too?
Check text, images, and audio in the mobile app.
Use these free browser tools for mechanical review, then use Stealth AI Detector when you need AI and human probability signals.
