The formula
If your target keyword is “word counter” (two words), it appears 12 times and the page has 1,500 words, the density is 12 × 2 ÷ 1,500 = 1.6 percent. For a single-word keyword the number of words in the phrase is one. The Keyword Density Checker does the calculation and lists your other top terms.
Is there an ideal keyword density?
No. Recommendations of 1 to 3 percent circulate widely, but they are rules of thumb with no basis in published search-engine guidance. Modern search engines understand synonyms, related terms and the meaning of a passage, so a page about word counters that uses “character counter”, “text length” and “writing tool” naturally is well understood without exact repetition. Over-repeating a phrase makes writing worse and can look like stuffing.
How to use the metric well
- Use it as a safety check, not a goal. A density above about 3 percent usually means the text repeats itself.
- Check that the main phrase appears in the title, the H1, the introduction and where natural.
- Look at related terms with the N-gram Analyzer; coverage of related concepts matters more.
- Read the page aloud; if the phrase grates, vary it.
Related concepts
Term frequency–inverse document frequency (TF-IDF) weighs how distinctive a term is across a collection, but it is also a simplification. Search engines use far more signals, including entities, links, user behaviour and quality evaluation. See Does Word Count Affect SEO? for the related question about length.
In other languages
The calculation is the same for Urdu, but a large share of Urdu text consists of function words, so densities look lower; use the Urdu Keyword Density Checker and judge by naturalness. The Word Frequency Counter gives you the full picture of which words dominate.
Frequently asked questions
What is a good keyword density?
There is no official figure; keep it natural, usually under 2–3 percent.
Does Google use keyword density?
Not as a ranking formula.
Does it include synonyms?
No. It counts exact matches only.