Reading Level Analyzer Comprehensive readability analysis using all major formulas in one report.

What Is Reading Level Analyzer?

Runs all six major readability formulas simultaneously: Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, Coleman-Liau, SMOG, and ARI. Each takes a different approach (syllables vs characters, sentence vs vocabulary focus). The consensus grade level averages their outputs for the most reliable assessment possible. Includes detailed statistics and contextual recommendations.

Why Use Reading Level Analyzer?

• Six formulas in one click
• Consensus averages out individual biases
• Side-by-side comparison reveals specific issues
• Detailed statistics for each formula
• Actionable recommendations by grade level

Common Use Cases

Content Strategy

Set and verify readability targets across content libraries.

Editorial Standards

Establish readability benchmarks for publications.

Pre-Publication

Final readability check before publishing.

Competitor Analysis

Compare readability against competitors.

Technical Guide

Computes: Flesch = 206.835-1.015*ASL-84.6*ASW (0-100). FK = 0.39*ASL+11.8*ASW-15.59. Fog = 0.4*(ASL+100*complex%). CLI = 0.0588*L-0.296*S-15.8. SMOG = 3+sqrt(poly*30/sentences). ARI = 4.71*(chars/words)+0.5*ASL-21.43. Consensus = mean of FK, Fog, CLI, SMOG, ARI grades.

Tips & Best Practices

• 1
  Disagreeing scores reveal specific writing issues
• 2
  High Fog + low CLI = polysyllabic words are the problem
• 3
  Target consensus grade 8 for maximum accessibility
• 4
  Use as final check before publishing

Related Tools

Flesch-Kincaid Readability

Calculate Flesch-Kincaid readability score and grade level for any text.

✍️ Writing Tools

Gunning Fog Index

Calculate the Gunning Fog readability index to measure text complexity.

✍️ Writing Tools

Coleman-Liau Index

Calculate the Coleman-Liau readability index using character-based analysis.

✍️ Writing Tools

SMOG Index

Calculate the SMOG readability index for healthcare and public documents.

✍️ Writing Tools

Automated Readability Index

Calculate the Automated Readability Index using character counts.

✍️ Writing Tools

Dale-Chall Readability

Calculate Dale-Chall readability score using familiar word analysis.

✍️ Writing Tools

Frequently Asked Questions

Q Which formula is most accurate?

No single formula is best. Consensus averaging produces the most reliable result.

Q Why do scores disagree?

Different formulas weight different factors. Disagreement reveals specific issues.

Q What consensus to target?

Web content: 6-8. Professional: 10-12. Academic: 12-16.

Q How much text needed?

At least 100 words for reliable results.

Q Why is Flesch shown differently?

Flesch uses inverted 0-100 scale (higher=easier) while others output grade levels (lower=easier).

About This Tool

Reading Level Analyzer is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.