Calculator form
Example data table
| Page Type | Words | Flesch Ease | Grade | Passive % | Transition % | Final Score | Verdict |
|---|---|---|---|---|---|---|---|
| Service landing page | 640 | 72.4 | 7.1 | 6.5% | 34.0% | 88.6 | Excellent |
| Blog introduction | 480 | 66.8 | 8.4 | 9.2% | 28.0% | 79.4 | Strong |
| Product category copy | 710 | 58.2 | 9.5 | 12.7% | 21.0% | 68.3 | Moderate |
| Technical article section | 980 | 46.7 | 11.8 | 18.4% | 19.0% | 54.9 | Needs Improvement |
Formula used
The calculator combines classic readability formulas with practical writing signals often used during on-page editing.
- Average Sentence Length = Total Words ÷ Total Sentences
- Average Syllables per Word = Total Syllables ÷ Total Words
- Flesch Reading Ease = 206.835 − (1.015 × Average Sentence Length) − (84.6 × Average Syllables per Word)
- Flesch-Kincaid Grade = (0.39 × Average Sentence Length) + (11.8 × Average Syllables per Word) − 15.59
- Passive Voice % = Passive Sentences ÷ Total Sentences × 100
- Transition Coverage % = Sentences with Transition Terms ÷ Total Sentences × 100
- Long Sentence % = Sentences Above Target Length ÷ Total Sentences × 100
- Long Paragraph % = Paragraphs Above Target Size ÷ Total Paragraphs × 100
- Keyword Density % = Keyword Uses ÷ Total Words × 100
- Final Score = Weighted blend of readability, structure, flow, voice, grade fit, and optional keyword balance
Passive voice and transition checks are heuristic. They guide editing decisions, but they are not grammar-engine replacements.
How to use this calculator
- Paste your draft into the content area.
- Enter a focus keyword if you want keyword balance included.
- Adjust sentence, paragraph, transition, passive, and grade targets to match your audience.
- Click Calculate Score to see the result above the form.
- Review the component graph and recommendations for weak areas.
- Download the summary as CSV or PDF for reporting, revisions, or client sharing.
FAQs
1. What does this score measure?
It measures how easy your content is to read and refine. The score blends sentence length, syllables, passive voice, transitions, paragraph balance, grade level, and optional keyword density.
2. Is a higher score always better?
Usually, yes. Still, the best score depends on audience and topic. Technical pages may need a slightly higher grade level than local service pages or ecommerce category copy.
3. Why does keyword density matter here?
Keyword balance helps keep copy relevant without sounding forced. Too little may weaken topical signals, while too much can reduce clarity and make writing feel repetitive.
4. Can I use this for blog posts?
Yes. It works well for blog posts, service pages, category pages, product copy, newsletters, and knowledge base content where clarity and scanning speed matter.
5. Does this replace human editing?
No. It speeds up diagnosis, but tone, intent match, brand voice, and accuracy still need human review. Use the score as a strong editing assistant.
6. What score should I aim for?
For most general web content, aim for 70 or above. If your audience is broad, try to keep the grade near 7 to 9 and passive voice low.
7. Why is passive voice only estimated?
Passive voice detection here uses pattern matching, not full linguistic parsing. It catches many common cases, but some sentences may still be overcounted or missed.
8. Can I export the results?
Yes. After calculation, use the CSV or PDF buttons to download a summary of the score, key metrics, and recommendations for documentation or client delivery.