SEO & Marketing Tools
Keyword Density and Frequency Analyzer
Analyze pasted text for total words, selected-term frequency, matched-word coverage, and repeated terms.
Enter the values and review the result.
Optional: enter one word or a multi-word phrase for a focused frequency check.
Calculation assumptions
- *The analyzer counts words, checks an optional selected word or phrase, and shows frequent individual terms.
- *For one word, coverage equals its standard density: occurrences divided by total words. For a phrase, coverage is the number of words in non-overlapping phrase matches divided by total words.
- *Keyword density is only a basic content signal and does not guarantee SEO performance.
- *Punctuation and formatting can affect how words are counted.
Enter your input and press Analyze Keywords.
Analysis results will appear here.
What this analyzer measures
Paste the text you want to inspect and optionally enter one word or phrase. The analyzer reports total words, selected-term occurrences and matched-word coverage, plus the five most frequent individual words. This is different from a word counter because it focuses on repetition rather than length alone.
The calculation runs in this page's browser code. Even so, avoid pasting confidential or sensitive material into any web tool. Use density as a repetition check, not a ranking promise.
Formula and worked example
For one word, coverage equals standard density: occurrences / total words x 100. For a phrase, matched-word coverage = non-overlapping occurrences x words in the phrase / total words x 100.
Example: “blue car blue bike blue car” contains 6 words. The phrase “blue car” appears twice and covers 4 of the 6 counted words, so its matched-word coverage is 66.7%. That unusually high repetition is a prompt to reread the text, not an automatic SEO score.
How to interpret repetition
A high percentage may be expected in a short product label, glossary entry, or tightly focused paragraph. In longer writing, repeated wording can make sentences feel mechanical. Check whether each use helps the reader and whether related language would be clearer.
Compare length with the Word Counter, formatting limits with the Character Counter, and broader writing decisions in Web Writing Tips. For metadata work, use the Meta Tag Generator or browse SEO and Marketing Tools.
Common mistakes
- Chasing an exact density number instead of writing naturally.
- Repeating a keyword so often that the content becomes hard to read.
- Ignoring related terms, search intent, headings, and page usefulness.
- Assuming keyword density alone can guarantee SEO rankings.
Transparency note
Accuracy and limitations
Calzivo tools are built for practical estimates, conversions, and checks. Some tools use standard formulas or simplified assumptions, and results can be affected by input accuracy, rounding, units, local rules, or changing official requirements.
Results depend on the values you enter and any simplified assumptions used by the tool. Verify important results before making decisions or submitting official information.
How to Use This Tool
Use these steps to enter the right inputs and interpret the result correctly.
Paste the text you want to analyze.
Optionally enter a word or phrase you want to check.
Review total words, selected-term occurrences and matched-word coverage, and the top five frequent individual words.
Use the results to spot repetition, then read the text naturally before making edits.
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Related Guides
Background reading and explanations related to Keyword Density and Frequency Analyzer.
Frequently Asked Questions
Common questions about Keyword Density and Frequency Analyzer and how to read the result.
What is the ideal keyword density?
There is no universal ideal number. Use density as a warning sign for overuse, not as a ranking formula.
How is density calculated?
For one word, occurrences are divided by total words. For a multi-word phrase, the tool reports matched-word coverage: non-overlapping occurrences multiplied by phrase length, divided by total words.
Does keyword density guarantee SEO ranking?
No. Search performance depends on content quality, search intent, technical setup, links, and many other signals.
Can I analyze long articles?
Yes, but very long pasted text may be slower depending on your browser and device.
Does it count phrases?
Yes. Enter a phrase in the focused check field. The analyzer counts non-overlapping matches and reports the percentage of counted words covered by those matches.
Why are numbers included?
The word matching pattern can count numbers and simple word-like tokens from the pasted text.