Flesch Kincaid Calculator

Summary

Paste any text to instantly get Flesch Reading Ease and Flesch-Kincaid Grade Level scores with a full per-sentence breakdown.

How it works

1. Paste or type your text into the input area.
2. The tool counts sentences, words, and syllables automatically.
3. Flesch Reading Ease = 206.835 − 1.015 × (words/sentences) − 84.6 × (syllables/words).
4. Flesch-Kincaid Grade Level = 0.39 × (words/sentences) + 11.8 × (syllables/words) − 15.59.
5. A color-coded interpretation label tells you the target audience.
6. The per-sentence table shows grade level for each individual sentence.

Use cases

• Check whether a blog post or article matches your target reading level.
• Simplify legal or medical documents for a general audience.
• Verify that educational materials suit the intended grade level.
• Optimize marketing copy for maximum clarity and engagement.
• Assess employee communications and internal memos for readability.
• Improve UX copy and onboarding text in software products.
• Grade student writing assignments for readability and complexity.
• Benchmark readability before and after editing a draft.

Frequently Asked Questions