keyword density

What is Keyword Density? A Complete Guide from Application to Best Checking in 2023!

When we write things on the internet, we often wonder how many times we should use a particular word we want to focus on. Well, there’s a way to figure that out, and it’s called “keyword density.” To find the keyword density, we divide the number of times we used that word by the total number of words in the text.

In this article from the thinkwriteway technology blog, we’ll explain what keyword density means in terms of SEO (search engine optimization) and how to calculate it. We’ll also talk about why it’s essential to optimize websites and the tools used to measure keyword density.

The concept of keyword density in SEO

When you create content for your website following SEO principles, it’s crucial to use the main keyword in different parts of your text. This assists Google in understanding the topic of your page.

“density of Keyword is a term used in SEO to measure how often you’ve used the main keyword or phrase compared to the total number of words in the text. In simple terms, it tells you how many times you’ve used the main keyword in a certain number of words. To calculate the keyword density, you divide the frequency of the keyword by the total number of words in the text and then multiply the result by a hundred.

density of Keywords for SEO is how often a specific word or phrase appears on a web page. It helps show how relevant the content is to what someone searches for on a website.

When the density is higher, it means the text is more closely related to what the user is looking for, and the page might be shown higher in the search results. However, just using the keyword too much in the text won’t guarantee a higher ranking.

Don’t repeat the same word too much in your content because if you do, Google might think it’s spammy and not like it. But also, don’t use the word too little, or Google won’t understand how it’s related to what people are searching for.

The density of keywords is about finding the right balance between using the word enough and not overusing it. In the next part, we’ll talk about why this is important for SEO on websites.

How to calculate keyword density

To figure out how often a specific word appears in a piece of writing, you can do a simple calculation. Count how many times that word appears, then divide it by the total number of words in the text. The same idea applies to phrases made up of multiple words.

However, the way you calculate it is a little different for individual words and phrases.

1. Calculating the density of the keyword

When you optimize the content of the page for a keyword that consists of only one word, just divide the number of times that word is used in the text by the number of words in the text and multiply the result by 100.

keyword density

For Example, you have an article that has 3000 words in it. Inside that article, there is a specific main word that appears 5 times.

We measure how often this main word appears compared to the total number of words in the article. In this case, it turns out that the main word makes up 0.3% of the total words in the article.

2. Calculating the density of the keyword

If the length of the main keyword is more than one word, it is called “Key phrase | Long-Tail Keyword”. These keywords express the user’s search intent more clearly and have a higher conversion rate compared to single-word keywords.

To find out how often these specific keywords appear, you can use a simple formula. If you want to figure out the keyword density, follow these steps:

  1. Count how many times the keyword appears in the text.
  2. Count how many words are in the keyword.
  3. Divide the first number (keyword frequency) by the total number of words in the text.
  4. Finally, multiply the answer by 100 to get the keyword density.

In simple terms, this paragraph explains how to calculate the density of certain keywords in a text using a straightforward formula. Just count the number of times the keyword appears, divide it by the total words in the text, and multiply by 100 to get the keyword density.

 keyword density

For Example, we have a piece of writing with 8000 words, and in that text, we used the phrase “site SEO analysis” 20 times. The density of this phrase would be 0.75%, which means it appears about three-fourths of a percent in the entire text.

The importance of keyword density in SEO

At the start of our discussion, let’s make things simple and clear: the keyword density index doesn’t matter much for the internal SEO of your website. This is true up until the current time, which is the middle of 2023. So, having a higher density of keywords won’t make your website appear higher in search engine rankings for users.

But that doesn’t mean you should ignore this indicator altogether. To understand why it’s important to keep an eye on keyword density when creating content, let’s take a look at its history in website SEO since 1990.

In the past days, before Google and other search engines became so smart, they used something called “density of keyword to decide how high a website should rank in search results. Keyword density means how many times a specific word appears in the content of a webpage.

The more times that word was used, the better chance the website had of showing up near the top of the search results. This made many SEO experts and content writers try to use certain words a lot to get their pages to show up higher in the search results.

  • Keyword Stuffing
  • Keyword Cloaking
  • Invisible Keywords
keyword density

The methods mentioned above were part of something called “black hat SEO,” which means they were tricks used to cheat the system. These tricks not only broke the rules of SEO but also made it harder for people to read the website’s content. Because of this, Google and other search engines decided to make the “keyword density” less important when ranking websites.

They did this by updating their algorithms (the way they decide which websites to show in search results) and using algorithms like “Panda” and “Rank Brain” in SEO. These changes were made to ensure that websites with valuable and user-friendly content would rank higher in search results.

Today, Google doesn’t rely on having lots of specific words to rank a website. Instead, they use something called “Semantic Search.” This means that search engines can now understand the connection between what a user searches for and what’s on a webpage without the need for the same word to be repeated multiple times in the text.

Of course, this doesn’t mean that keyword density is no longer important. Based on my experience of creating content on the technology blog web, it’s still crucial to pay attention to this factor when writing so you don’t end up overusing keywords, which is known as keyword stuffing.

Measuring the keyword density

Until now, you have learned about keyword density and how it’s calculated. Now, let’s talk about why it matters for SEO on websites. You might be wondering what the best keyword density is – in simple terms, how many times a keyword should appear. Is there a specific number that makes keyword density good or bad?

Finding the perfect number of keywords to use in content is complicated, and it’s hard to give a positive answer because there’s no perfect rulebook.

However, SEO experts have talked a lot about this topic. Google has confirmed that the most important thing is to use keywords naturally in your content. Repeating keywords many times doesn’t make your website rank higher in search results. So, what should we do about keyword density?

The ideal number for keyword density

Based on the points above, you don’t have to worry too much about this index and pick a specific number for it. But remember, using the same keyword over and over again won’t help your content and will make it harder for people to read.

So, most SEO specialists suggest using keywords and phrases about 1 to 2 times for every 100 words in your text. This way, you won’t overload the content with keywords, and search engines will still understand what your content is about.

Important point: The way your content performs on search results can vary depending on the topic, field, and other websites competing for attention. Your content might have a slightly lower or higher keyword density compared to the value mentioned above. However, based on search history, both Google and other search engines seem to respond well to a keyword density of about 0.5%.

Applications of keyword density

Now that you understand why keyword density is important and how it is measured, let’s explore some practical uses of this old index in a simple and user-friendly way. SEO experts discuss these applications, and I’ll list them below so you can see why it’s still essential to pay attention to this index. Here they are: [list the applications].

  • If you use a lot of keywords in your text, you can check how often they appear by looking at the keyword density. By making the necessary corrections, you’ll ensure that the words are not repeated too much, and your writing will become easier to read.
  • Some older search engines still use keyword density to find the most relevant results when someone searches for something.
  • Many people who do SEO (search engine optimization) keep things in check by monitoring how often keywords appear in content written by freelance writers.

Check out some important points about keyword density

So far, you’ve learned about something called “density of keywords” and why it’s important. Now, we’ll talk about some important things related to using keywords in your writing. These tips will help you find the right balance and use keywords properly in your text. Here are the tips:

  • Using semantically related words when choosing a keyword
  • Avoid overuse of keywords
  • Using the main keyword in the main parts of the content
  • Not focusing on a specific number for the keyword density index
  • Focus on content thematic coverage

In the following, we will examine each of the above points.

Using LSI keywords when choosing keywords

When you search for words to use in your content, you might have heard about something called Latent Semantic Indexing or LSI keywords. LSI keywords are words or phrases that are connected to the main topic you’re writing about. For instance, if you’re writing an article about ‘types of website SEO,’ words like ‘SEO and optimization,’ ‘site SEO,’ and ‘external SEO’ could be LSI keywords that fit well with your article.

But what does the use of these words contribute to the content?

  • It prevents excessive repetition of the keyword and saturation of the text.
  • It preserves the semantic connection of different parts of the content and increases the probability of appearing in more search results.

The easiest way to find these keywords is to use Google’s “Related Searches” section. For example, the image below shows the related searches section for the term ” keyword research “:

keyword density

In the example above, instead of saying “keyword research” over and over again, you can use other phrases like “finding keywords” or “how to choose keywords”. This way, it’s not too repetitive and easier to understand.

The keyword research process is the first step in website SEO and it has different steps.

Do not overuse the main keyword

In the previous sections, we mentioned that checking how often a specific word appears in the text is important to avoid using it too much. When you use a word too many times, it can make it hard for people to read your writing, and Google may not like it either. So, it’s essential to avoid this problem completely. Here are some tips to help you do that:

  • First of all, when you write, think about what will help the person reading it, not just what Google likes. When people find what they need and like your content, Google will also be happy, and your page will show up higher in search results if you follow other SEO rules.
  • Include different forms of the main keyword in your writing. Use it with other words and phrases too.
  • To avoid repeating the same word too much, use similar words that mean the same thing. For example, instead of saying “cheap” many times, you can say “economical” or “affordable”.
  • When looking for keywords, find ones that are related and longer. Try to focus your content around them. Key phrases are useful because many people search for them, and it’s not as hard to rank high on the search results page. This is because they match what people are looking for better.
  • Use keywords only when you really need to. We will discuss this further in the upcoming section.

Attention to the main places of keyword distribution

When you write a text, make sure you don’t repeat the same word too many times. Instead, use the main keyword in specific places to improve the ranking of your web page on search engines. These places are:

Title Tag: The first important thing for Google to understand what a web page is about is the title tag. It’s like the headline of a book or article. So, when you create the title for your page, make sure to include the main word that people would use to find your page. If you can, try to use that main word at the beginning of the title.

keyword density

Single Link: Using the main word in the website link helps search robots know what the page is about. It’s an important part of how the website is optimized for search engines.

keyword density

Meta Description: This section is actually a small preview of the content of the page, and the use of the main keyword in it is actually a confirmation of the relevance of the content of the page to the topic required by users.

keyword density

H1 Tag: The main title of the article is like the headline or main heading. It’s placed inside a special tag called H1. You should make sure to use the main keyword (important topic word) in this title. When a user clicks on a page link in the search results, they’ll see this title at the top of the page in a big font. If you use a WordPress content management system, this is done automatically.

H2 Tags: Using the main keyword in the subheadings of the page helps Google and users better understand the structure of the content and understand what aspects of the subject are discussed in the text.

The First 100 to 150 Words of the Text: Google inspects the first paragraph of the text more carefully. Therefore, by using the main keyword in this section, make sure the search robots are related to the topic of the page with the user’s search term.

keyword density

” Alt Text ” ( Alt Text ): Google cannot understand what’s in images, but if you include the main keyword in the image description, it helps Google know that you’ve used relevant images in your content.

keyword density

An End paragraph of the Text:  When you put the main keyword at the end of your text, you let Google know that the main keyword is connected to the text until the end of your content. Look at the picture below; it shows a part of the text that comes at the end of the article and is related to the summary.

keyword density

Of course, there’s one important thing to remember about all these sections. You should use the main keyword in a very natural way in these parts, not just because they have to be there. If you can, you may also include other words and phrases that mean the same or are related to the main keyword to make these sections even better.

Not considering a fixed number for the density of the keyword index

As we mentioned in the previous sections, there’s no specific rule for how many times you should use a keyword on a web page. Google says the right number depends on what the page is about, the other websites that cover the same topic, and some other things.

So, don’t worry about using a set number of keywords when you create content. Just write naturally, and use the main keyword when it fits naturally in the text.

Focus on content thematic coverage

The truth is that keyword density matters for the reasons we’ve discussed so far. Search engines still look for the exact match of the keyword in the content to determine its rank. Another important aspect is called ‘content topic coverage.’ This means creating content that meets the user’s needs and provides valuable information when they search for something.

Keyword density is mostly for satisfying search engines, while content topic coverage is more about satisfying the user.

Making users happy is what Google wants, so it’s best to create content that covers the topic well and includes all the necessary information. Also, make sure to use the right keywords in different parts of the text. Finding a good balance between these two things is important.

Keyword density measurement tools

You can figure out how many times a specific word appears in your writing (using Ctrl+F), and then divide that number by the total words to find the density of the keyword. However, there are tools available that make this process quicker. We’ve listed these tools below:

SEO Review Tools Keyword Density Checker ” + “: This free tool is browser-based just enter a single website link or web page text and it will calculate the density of keywords in the text for you.

keyword density

This tool provides you with the density of words that are unnaturally repeated in the text in separate tables, and you can check the density of different expressions with its help.

SEOBook Keyword Density Analyzer tool ” + “: This tool is completely free like the previous tool, but to use it, you must create an account. In addition to providing a basic density of keyword reports, it provides you with the ability to search for the target keyword in Google, and through it, you can also check the data related to the first 5 results on the results page.

Copywritely Keyword Density Checker ” + “: This tool sorts your keywords by density and uses different color schemes to better display the topic. Copywritely has more limited features compared to the previous two tools, but it’s good for getting started because it has a simple user interface to check the density of keywords more easily.

keyword density

Webconfs Keyword Density Checker tool ” + “: Another free tool for calculating and evaluating the density of keywords, which also takes into account the SEO title, number of images, meta information, alt text of images, and the like in its report.

keyword density


Keyword density used to be an important concept in website SEO, where the number of times a keyword appeared in the content affected how well the page ranked in search results. However, search engines like Google have evolved with semantic search, making it unnecessary to repeat keywords excessively. Now, search engines can understand the relevance of the content to users’ search terms without focusing solely on keyword density. So, you don’t have to worry about a specific number of keywords when creating content.

Instead, just remember to include the main keyword in essential parts of the page, like the SEO title, the first and last paragraph of the text, the meta description, and a single link. In the main body of the content, use the main keyword naturally and when necessary, but avoid using it more than twice every 200 words. Instead of repeating the keyword, you can use synonyms and related keywords (LSI keywords).

Frequently asked questions about the density of keyword

In the previous sections, we talked about the density of keywords, the calculation method, and important points about it. In this section, we answer some frequently asked questions about it.

Is keyword density a ranking factor?

“Keyword density” is a way to figure out how often the main keyword is used compared to the total number of words in a text. It helps us understand how important the main keyword is in the text.

In the past, Google used to rely a lot on this to rank websites. If a page had a lot of the main keywords, it would rank higher in search results. But over time, some people tried to trick search engines by stuffing their pages with too many keywords, which is called “black hat SEO.” To stop this, search engines like Google decided to not give keyword density as much importance in rankings.

Nowadays, it’s not a major factor in ranking, and if a page uses too many keywords, Google may actually penalize it.

What is the ideal number for keyword density?

The truth is that there isn’t a clear-cut rule or perfect number for how many times a keyword should appear in a piece of writing. The advice mainly centers around not using the keyword too much, so it doesn’t take over the whole text.

However, seasoned SEO experts suggest using the main keyword about 1 to 2 times for every 100 words in the content. This means the keyword density should be around 1 to 2% of the content.

What is the use of checking keyword density?

Keyword density used to be an important factor for SEO rankings, but not anymore. However, it’s still helpful to consider it while writing to avoid repeating the main keyword too much.

You should focus on using the keyword at important places like the beginning and end of paragraphs, as well as in main headings and subheadings.

If you find additional information, please refer to this article on What is Keyword Density? A Complete Guide from Application to Best Checking in 2023!

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