Keyword Density: What It Is, Why There Is No Perfect Percentage, and How to Use It

Ask around about keyword density and you will hear confident numbers: 1%, 2%, "no more than 3%". None of them come from Google. Density is still a useful measurement, just not for the reason most people think.

How it is calculated

Keyword density is the share of all the words on a page taken up by one word or phrase:

density = (times the keyword appears ÷ total words) × 100

A 1,200-word article that uses "credit card interest" 18 times has a density of 18 ÷ 1,200 × 100 = 1.5%.

Tools differ on phrases. Some count a three-word phrase as one occurrence, others count all three words against the total. That is why two checkers can show different figures for the same text, and another reason not to chase an exact number.

Why there is no ideal percentage

Google has said for more than a decade that it does not use keyword density as a ranking signal. Modern search understands synonyms, related terms and the topic of a page as a whole. A page about mortgages that mentions "home loan", "repayments" and "interest rate" is clearly about mortgages even if the exact word "mortgage" appears only a handful of times.

What does still happen is the reverse: repeating a phrase unnaturally, so the text reads as though it was written for a crawler, makes a page worse for readers. Google's spam policies call this keyword stuffing.

What a density check is actually good for

A density checker is really a word-frequency report, and that is genuinely useful:

• Catching accidental repetition. If "really", "very" or your product name tops the list, the writing needs a pass.
• Confirming the topic. If you wrote a guide to volume formulas and the most frequent meaningful words are "tank" and "litres" rather than "volume", your page may be answering a different question than the one you intended.
• Spotting gaps. If an important term barely appears, readers searching for it may not recognise the page as the answer.
• Comparing drafts. Run the old and new version side by side to see whether an edit changed the focus.

A sensible way to use it

1. Write for the reader first, using the words they would use.
2. Paste only the body text into the checker. Menus, footers and sidebars distort the count.
3. Look at the top ten words, not one percentage. Do they describe the page?
4. If one phrase stands out far above everything else, read those sentences aloud. If they sound forced, rewrite them with pronouns or natural variations.
5. Make sure the main topic appears where it matters: the title, the first paragraph and at least one heading.

Signs you have overdone it

• The same phrase appears in consecutive sentences.
• You have written awkward constructions like "best cheap laptop cheap" to fit a phrase in.
• A colleague reads it and asks why it sounds repetitive.

If any of those are true, the density number does not matter — the page needs editing.

Check your own text

Paste a draft into the keyword density checker to see every word's count and share of the total, and use the word counter for length, sentences and reading time.