Keyword Density: How Often Should You Use a Keyword in a Blog Post?
Somewhere, a plugin is showing a writer an orange light because their keyword appears five times instead of seven. They add two more mentions. The sentence now reads worse, and nothing else has changed. Keyword density is one of the oldest ideas in SEO and one of the most misunderstood. It is worth knowing what it measures, and what it does not.
Keyword density is the percentage of words in a text that are your target keyword: (keyword count ÷ total words) × 100. There is no ideal percentage, and Google does not rank pages by it. Use the keyword where it reads naturally, in the title, the opening paragraph, a heading and a few times in the body, and cover the topic thoroughly. As a sanity check only, many well-written articles land somewhere around 0.5 to 2 percent. Repeating a keyword to hit a number is keyword stuffing, which Google treats as spam.
- Density is a description of a text, not a target.
- Placement matters more than count: title, introduction, headings.
- Covering related subtopics and questions does more than repeating one phrase.
- If a sentence sounds odd read aloud, the keyword is forced.
01What keyword density is
Keyword density tells you how much of a piece of writing is taken up by one word or phrase.
The formula: density = (number of times the keyword appears ÷ total number of words) × 100.
If a 1,000-word article uses "sourdough starter" 12 times, the density is 1.2 percent. Some tools count each word of a multi-word phrase, which gives a higher figure, so numbers from different tools do not always agree. What matters is consistency: use one tool and compare like with like.
Two related terms come up in the same conversations:
- Keyword frequency is the raw count: how many times the phrase appears.
- Keyword prominence is where it appears. A mention in the title or first paragraph is more prominent than one in the last line.
02Why people still talk about it
In the early days of search engines, ranking leaned heavily on how often a query's words appeared on a page. Site owners responded by repeating keywords, sometimes in hidden text. Search engines then spent years learning to ignore and penalise that.
Modern search works very differently. Google's systems analyse meaning, context, related terms, links and many other signals. Its representatives have said for years that there is no optimal keyword density and that it is not something to focus on. Its public spam policies list keyword stuffing, described as filling a page with keywords or numbers in an attempt to manipulate rankings, as a violation.
So why does the idea survive? Because it is easy to measure, and because SEO plugins show it. A simple number feels like control. Used carefully it does have one real use, which we will come to.
Google's documentation on helpful content asks whether a page is written for people and leaves them feeling they have learned enough. It does not mention a percentage. A page can rank for a phrase it never uses exactly, because search engines understand synonyms and related wording.
03Does keyword density matter at all?
Yes, in a limited way, at both extremes.
| Situation | What it usually means | What to do |
|---|---|---|
| 0%: the keyword never appears | The article may not clearly be about the topic, or uses different wording from searchers | Check the title, introduction and headings name the topic in the words people search with |
| About 0.5 to 2% | Typical of natural writing on a focused topic | Nothing. Move on to quality and coverage |
| Around 3% and above | Often reads as repetitive | Read it aloud; replace some mentions with pronouns, synonyms or specifics |
| Very high, with awkward phrasing | Keyword stuffing | Rewrite for readers |
These bands are a rule of thumb used by writers and SEO tools, not thresholds published by any search engine. A 300-word product description and a 3,000-word guide behave differently, and long keyword phrases naturally appear less often than single words.
The useful question is never "Is my density 1.5 percent?" It is "Would a reader notice this word being repeated?"
04Where to use your keyword, step by step
Placement gives search engines and readers clear signals with very few mentions.
- Title tag and H1. Once, near the start. See our guide to title tags and meta descriptions.
- The first paragraph. Ideally in the first 100 words, where you say what the article is about.
- One or two subheadings, where it fits naturally. Variations are fine.
- The body, wherever you would say it in conversation.
- The URL slug. Short and descriptive; see SEO-friendly URLs.
- Image alt text, only when the image really shows that thing.
- The meta description, once, for the searcher's benefit.
After that, stop counting and start covering. Ask what a reader searching this phrase also needs to know. Related terms, questions, examples and comparisons build topical relevance far better than an eighth repetition.
Write the first draft without thinking about the keyword at all. Then run it through an analyzer. If the phrase is missing from the title, introduction or headings, add it there. If one ordinary word dominates the "most used words" list, vary it. That is the whole job.
05Free content and keyword analyzer
Paste your draft, add a keyword if you want its density, and press Analyze. You get the counts, reading time, keyword frequency and your most used words and phrases.
Loading the tool. If this message does not disappear, JavaScript is being blocked or changed on this page.
Content & Keyword Analyzer
Browser-based tool
Counts everything in your browser. No AI, and your text is not sent anywhere. Built for English text.
Most used words
Most used two-word phrases
How the tool works
The analyzer counts in your browser. Words are sequences of letters and numbers; sentences are split at full stops, question marks and exclamation marks; paragraphs at line breaks. Reading time assumes about 230 words per minute. Keyword density is exact-phrase matches divided by total words, ignoring capital letters. The "most used" lists leave out common English words such as "the" and "and". The readability note is a basic indication from average sentence length and the share of long words; for full Flesch scores use our readability checker. The tool does not judge quality, does not see search results and cannot tell you how a page will rank.
06Practical examples
Stuffed and natural
"Looking for the best running shoes? Our best running shoes guide reviews the best running shoes so you can buy the best running shoes for you. Best running shoes are important because best running shoes protect your feet."
"The best running shoes for you depend on where you run and how your foot lands. This guide compares cushioned, stability and trail models, explains what the numbers on the box mean, and suggests a pair for each kind of runner."
The first paragraph uses the phrase six times in 38 words. The second uses it once in 41 words and tells you far more. It also brings in the related ideas, cushioning, stability, trail, that show the page understands the subject.
Three articles, three densities
| Article | Words | Keyword uses | Density | Verdict |
|---|---|---|---|---|
| Product description for a ceramic mug | 250 | 4 | 1.6% | Fine; short texts run higher |
| How-to guide on WordPress caching | 2,000 | 18 | 0.9% | Fine |
| "SEO tips" article repeating the phrase in every paragraph | 800 | 40 | 5% | Repetitive; rewrite |
07Should you track keyword density?
Pros
- Quick check that the topic is named clearly
- Catches accidental over-repetition
- Useful when editing other people's drafts
- Shows which words dominate a text
Cons
- No target value exists
- Encourages writing for a number
- Says nothing about quality or intent
- Different tools give different figures
Use it as a two-minute editing check. Do not use it as a writing goal, a way to compare yourself with competitors, or a reason to change a sentence that already reads well.
08What matters more than density
The right kind of page
A guide for a how-to search, a comparison for a "best" search. See search intent explained.
The whole topic
Answer the follow-up questions a reader would have. "People also ask" is a good source.
Easy to read
Short sentences, clear headings, the answer near the top.
Something of your own
A test, an example, a number you measured, an opinion you can defend.
One more thing to check: that two of your own pages are not chasing the same phrase. That splits your signals, whatever the density. Our guide to keyword cannibalization explains how to find and fix it.
09Common mistakes
- Chasing a percentage. Adding mentions to turn a plugin light green.
- Using the exact phrase every time. Real writing uses "it", "they" and other ways of saying the same thing.
- Forcing ungrammatical keywords. "Best plumber London cheap" is a search query, not a sentence.
- Stuffing alt text, footers and tag lists. Hidden or boilerplate repetition is still stuffing.
- Ignoring the opening. A 2,000-word article that does not name its subject until paragraph four.
- Copying a competitor's density. Their ranking has many causes; this is unlikely to be one.
- Counting once and never re-reading. The ear catches repetition that a counter rates as acceptable.
- Letting AI drafts repeat the prompt. Generated text often echoes the keyword you gave it in every paragraph. Edit it down.
10Advanced tips
- Check your real queries. In Search Console, filter the Performance report by page and read the Queries list. Those are the words people actually used; work the relevant ones into headings and answers.
- Use variations naturally. Singular and plural, a longer version of the phrase, the question form.
- Watch two-word phrases. The analyzer's phrase list shows what the article is "about" in practice. If your main topic is not near the top, the piece has drifted.
- Refresh old posts. Older articles were often written to a density target. Reading them aloud and trimming repetition is a quick win; see how to update old blog posts.
- Write the brief first. Listing the questions the article must answer keeps you covering the topic, not repeating it.
11Keyword checklist
12FAQ
It is the percentage of words in a text made up by a chosen keyword or phrase, calculated as keyword count divided by total words, multiplied by 100.
There is no official ideal. Natural writing on a focused topic often falls around 0.5 to 2 percent, which is a sanity check, not a target. Google does not rank pages by density.
No. Google has said repeatedly that there is no optimal density. Its systems assess meaning and relevance in many ways, and it treats keyword stuffing as spam.
As often as reads naturally. In practice that is usually somewhere between five and fifteen times, including the title and a heading, but the count matters less than clear placement and good coverage.
Repeating words or phrases unnaturally, or hiding them on a page, in an attempt to manipulate rankings. Google's spam policies list it as a violation that can lower a page's ranking or remove it from results.
Count how many times the phrase appears, divide by the total number of words and multiply by 100. The analyzer on this page does it for you.
No. Frequency is the raw number of times a keyword appears. Density expresses that number as a percentage of the total word count.
Search engines understand related wording, so using synonyms and covering related subtopics helps a page be seen as relevant. They are not counted in a simple exact-match density figure.
Treat it as a prompt to re-read, not an instruction. If the text reads well and names the topic clearly, an amber light is not a reason to add repetitions.
13Final recommendation
Keyword density is a simple ratio that tells you whether a text names its topic and whether it repeats itself. It is not a ranking formula and has no correct value. Put the keyword in the title, the opening and a heading, write the rest for the reader, and cover the questions they will ask next. Then paste the draft into the analyzer above once, fix anything at either extreme, and publish.
Official references
- Google Search Central: spam policies, including keyword stuffing
- Google Search Central: creating helpful, reliable, people-first content
- Google Search Central: SEO Starter Guide
- Search Console Help: Performance report
Related articles
Next step
Paste your latest draft into the analyzer above. Then test its title and description with our title and meta description tester.
