GRADE FIT
Estimated Reading Level
Use the grade estimate to check whether the copy matches the audience’s expected reading comfort.
Free to use • No registration required
Automated Readability Index Tool
Calculate the Automated Readability Index for quick grade-level readability review.
Understanding Your Automated Readability Index Results
ARI estimates the grade level needed to understand a text by looking at characters per word and words per sentence.
REVIEW
Long Sentence Risk
Long sentences can increase the ARI score and make the message harder to follow.
SIMPLIFY
High Grade Level
A high ARI result means the content may need shorter sentences and simpler wording before publishing.
About This Tool
The Automated Readability Index Tool estimates reading grade level using characters per word and words per sentence. It is a fast way to judge whether copy may be too dense for the intended audience.
Use it for web copy, documentation, emails, product onboarding, and educational content where sentence length and word shape affect readability.
Why It Matters
1
Use a fast grade-level signal
ARI gives a quick estimate based on measurable text structure.
2
Find long sentence issues
High scores can reveal sentences that should be split.
3
Improve UX writing
Shorter, clearer copy reduces decision friction.
4
Compare draft versions
Measure whether edits made the text easier to read.
How To Improve
1
Paste your copy
Use the exact wording planned for publication.
2
Check the ARI score
Compare the grade estimate with your target audience.
3
Simplify sentence structure
Separate multiple ideas into smaller statements.
4
Re-check after editing
Confirm the score improved and the meaning stayed intact.
Frequently Asked Questions
It estimates reading grade level using characters per word and words per sentence.
It is useful, but no single formula is perfect. Use it with other signals and human judgment.
Use shorter sentences and simpler words where possible.
Yes, as a clarity checkpoint for content that needs to be easy to scan and understand.
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