Calculate Text Complexity

Analyze how easy or difficult your content is to read with the Calculate Text Complexity Tool. Whether you’re writing for the web, education, or documentation, this tool instantly scores your text using well-known readability metrics.

How to Use:

Paste your text into the left-hand input box. As you type or paste, the tool automatically calculates readability scores and displays them on the right.

You can customize the output with the Options toggles:

• Show Flesch Reading Ease to measure how easy the text is to read (higher = easier)
• Show Grade Level Estimate to get a U.S. school grade estimate
• Show sentence/word/syllable stats to view a breakdown of how the scores are calculated

Use the Clear All button to reset the input and analysis fields.

What the Calculate Text Complexity Tool does:

This tool analyzes your text using the Flesch Reading Ease and Flesch-Kincaid Grade Level formulas. It counts words, sentences, and syllables to determine how complex the text is and gives you scores that reflect reading difficulty.

Example:

Input:

The quick brown fox jumps over the lazy dog. It is often used as a typing exercise.

Output:

Flesch Reading Ease: 94.72
Flesch-Kincaid Grade Level: 2.91

Sentences: 2
Words: 14
Syllables: 18

Common Use Cases:

This tool is helpful for bloggers, educators, content strategists, and technical writers who want to ensure their writing is accessible to their target audience. Since it works entirely in your browser, your text never leaves your device. It’s instant, accurate, and completely private.

Useful Tools & Suggestions:

If you’re breaking down how difficult something is to read, Calculate Text Entropy gives you a raw score on randomness and structure great for comparing across different writing styles. And for surface-level prep, Normalize Text Spacing helps remove weird formatting that might throw off your results.