Keyword Density Calculator

Keyword density measures how often a keyword or phrase appears in a piece of text relative to the total word count. For writers and SEO professionals, it is a practical check to ensure a keyword is present enough to signal topical relevance without being repeated so often that it reads unnaturally. Use the calculator above to paste your text, enter your target keyword and get the density figure immediately.

How keyword density is calculated

The formula depends on whether your keyword is a single word or a multi-word phrase:

Density = (Keyword occurrences x Phrase word length / Total words in text) x 100

Step-by-step example: you have a 500-word article. Your target phrase is "content marketing" (2 words). It appears 6 times. The calculation is: (6 x 2) / 500 x 100 = 2.4%. For a single keyword appearing 10 times in the same 500-word text: (10 x 1) / 500 x 100 = 2%. The multi-word formula correctly accounts for the fact that each use of a phrase occupies more than one word slot in the total count.

How to interpret and use the result

There is no magic density target. The old notion that a keyword must appear at exactly 2% or 3% to rank well has no basis in current SEO. Google processes text semantically; what matters is that the keyword and its semantic variants appear naturally throughout the content.
0% density is a problem. If a calculator returns 0 occurrences for your primary keyword, your page is unlikely to rank for that term unless you add it explicitly. Check whether you are using synonyms only and whether the page title and headings include the keyword.
Very high density is a risk. Repeating a keyword more than necessary hurts readability and can be interpreted as keyword stuffing by search engines. If your density exceeds roughly 5% for a short text, review the copy and replace some occurrences with synonyms or related terms.
Check placement, not just count. Whether the keyword appears in the first paragraph, an H2 heading and the meta description matters more than the raw density. Density is a starting check, not the full picture.
Use semantic variants alongside the exact phrase. Add related terms, entity mentions and topic-adjacent vocabulary. A well-rounded article covering a topic naturally tends to include these without forcing them.
Run the check on the final version before publishing. Edits and rewrites often shift the keyword distribution. A final check with this calculator takes seconds and can catch both under-use and over-use before the content goes live.

A note on AI-generated content and keyword distribution

AI writing tools sometimes produce text with uneven keyword distribution: a term may cluster in one section while being absent elsewhere. Pasting AI-generated drafts into this calculator is a quick way to spot those gaps before editing. Trafic issu des IA on platforms like ChatGPT and Perplexity converts at roughly 7% according to available data, which is about 3x the average for organic search. Content that appears clearly relevant for a topic therefore matters in both classic SEO and in GEO contexts.

If you want to combine content quality work with tracking how your pages and brand appear across AI search engines, Sorank covers both SEO rank tracking and GEO monitoring in one tool.

Frequently asked questions

What is the ideal keyword density for SEO?

There is no universally agreed ideal. Most SEO practitioners suggest that a natural density of around 1% to 2% for the primary keyword is reasonable for a well-written page, but this varies by content length and topic. Focus on natural writing that covers the subject thoroughly rather than hitting a specific percentage.

Does keyword density affect Google rankings?

Keyword presence matters, but keyword density as a fixed metric does not. Google uses semantic understanding to assess relevance. A page that uses the keyword, its synonyms and related entities in a coherent and informative way will outperform one that merely repeats the same phrase at a calculated frequency.

Can I use the calculator for multi-word phrases?

Yes. Enter the exact phrase as your keyword. The calculator counts exact matches of the full phrase within the text. For a two-word phrase, each match is counted as two words in the density calculation, which gives a more accurate picture of how much space the phrase occupies in the overall text.