How to Use the Readability Score Calculator
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1
Paste your draft, article, essay, or email into the text box.
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2
Review your Flesch Reading Ease score (0 to 100) and equivalent US school grade level.
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Check sentence complexity breakdown: average sentence length, syllable count, and hard words.
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Edit your text in real time to see the score improve as you simplify sentences.
Practical Example & Use Case
Common Real-World Scenario
Optimizing blog posts or customer support help articles to achieve a 60+ Reading Ease score for maximum audience comprehension.
Technical Notes & Limitations
Browser Engine Architecture
Calculates phonetic syllables using standard English vowel grouping rules and diphthong heuristics.
Frequently Asked Questions
What is a good Flesch Reading Ease score?
A score of 60 to 70 is ideal for general public audiences (plain English, 8th-9th grade reading level).
Does this tool upload my writing anywhere?
No, all sentence and syllable metrics are calculated 100% locally in your browser.