The Flesch reading ease score: Why & how to use it

If you have ever run your writing through a readability checker like Yoast SEO, you have probably come across the Flesch reading score. This metric was developed more than 70 years ago and is still one of the most widely used ways to measure how easy your text is to read. But what does it actually mean, and how does it affect your writing for the web?

In this guide, we will explain how the Flesch reading score works, why it became so prominent in publishing and SEO, and how you can use it effectively today. We will also show you where it fits into the Yoast SEO plugin and why we have introduced new readability checks alongside it.

What is the Flesch reading score?

The Flesch reading score, also called the Flesch reading ease test, was created by Rudolf Flesch in the 1940s. His goal was simple: to give writers a quick way of checking whether their text was easy to understand. The formula combines three basic elements: sentence length, word length, and syllable count. When these figures are combined into the formula, which I’ll explain in just a moment, they generate a score between 0 and 100.

The highest scores are reserved for the easiest text. For example, a score in the 90s suggests that a typical 11-year-old child should be able to read it without any difficulty. A score of around 60 is closer to plain English that a high school student would be expected to understand. Scores under 30 are considered very difficult and are only really found in academic or legal writing.

Here’s a quick overview of the ranges and what they mean:

Just for fun: this article itself scores around 63 on the Flesch reading score, which puts it in the “standard” range.

How the Flesch reading score is calculated

The formula behind the score looks intimidating, but don’t worry, it is surprisingly straightforward. In fact, it’s only based on two things. The total number of words divided by the total number of sentences, which gives us the ASL or Average Sentence Length, and the total number of syllables divided by the total number of words to get the ASW or Average Syllables per Word. Once we have these figures, we enter them into this formula:

206.835 – (1.015 × ASL) – (84.6 × ASW)

This will give us a score between 0 and 100. The longer your sentences and the more complex your words, the lower your score will be.

Let’s take a quick example by looking at this short text below:

“The cat sat on the mat. The dog barked.”

This has very short words and sentences, so it would score in the 90s, which means it is very easy to read.

Now compare it with:

“The domesticated feline reclined languidly upon the woven floor covering, while the canine produced a resonant vocalization.”

This is essentially the same meaning, but longer words and clauses drop the score dramatically, likely into the 30s.

This example shows why the Flesch reading score works well as a proxy for readability. It rewards writing that is concise and simple with a high score and wags a finger at writing that is dense and complex, ultimately giving it a low score.

Why the Flesch reading score became important

The Flesch reading score spread beyond classrooms into business and publishing because it answered a universal question: Is my writing easy to understand?

By the 1970s, the U.S. Navy was using it to ensure that training manuals were clear for recruits. Later, several U.S. states made it part of their official requirements for insurance documents and consumer contracts. Healthcare organizations also began using it to ensure that patient information was accessible.

When personal computers became common, Microsoft Word added the Flesch reading ease test to its spelling and grammar tools. Suddenly, anyone writing a school essay or business report could get instant feedback on readability. That mainstreamed the score and kept it relevant well into the digital age.

In the world of web writing, readability became even more critical. Online readers scan rather than study text. Research shows they decide within seconds whether a page is worth their time or not. That makes clarity a competitive advantage. Tools that included the Flesch reading score gave web writers a way to benchmark themselves and improve user experience.

The Flesch reading score in Yoast SEO

When Yoast introduced readability checks to the plugin, the Flesch reading score was one of the first tools we built in. We popularized the use of tools to score your content. It gave writers using WordPress an instant way to measure whether their content was accessible to a broad audience. You can still find the Flesch reading ease score inside the plugin today, in the insights tab.

This has helped thousands of users discover that shorter sentences and simpler words often improve how people engage with their content. While the score does not guarantee better rankings, it does contribute to a positive reading experience, which in turn can influence user behavior and SEO outcomes.

Why Yoast moved beyond Flesch

Although the Flesch reading score remains useful, it is not perfect. It only looks at sentence and word length, without considering context, tone, or audience. A blog post aimed at medical professionals may score poorly but still be exactly right for its readers.

That is why we developed additional checks, including word complexity, which evaluates how challenging your vocabulary might be. This allows writers to balance clarity with precision, rather than chasing a single score. In practice, this means you can still use the Flesch reading score as a quick reference, but you should combine it with other insights to get the full picture.

Should you still care about the Flesch reading score?

The Flesch reading score remains a valuable guide for writers who want to make their content more approachable. If your text scores very low, it may be worth shortening sentences or replacing long words with simpler alternatives. But you do not need to obsess over getting a perfect score.

Readability is about more than numbers. Think about your audience, their expectations, and the purpose of your content. Combine the Flesch reading score with other readability signals to create a text that is clear, engaging, and optimized for both humans and search engines.

How to use the Flesch reading ease score to improve your writing

We’ve come to the essential question. How can you use the Flesch score to improve your writing? Well, you write for an audience and know your audience the best. Before writing or editing, consider what kind of texts fit your readers. Do you sell clothes or organize photography workshops? Or do you write for a mom blog or make step-by-step DIYs? Your content should be relatively easy to read in all these cases since you are targeting a broad audience.

However, remember that you do not have to chase a high Flesch reading score at all costs. For example, you may write about complex, specialist topics for a specific, more knowledgeable audience. Or, perhaps you are an academic blogging about your research? It makes sense if the Flesch test produces a lower score in those cases.

Still, whatever your situation is, your text always benefits from concise language. So, if you want to benefit from the feedback the Flesch reading ease score gives you, focus on two things:

1. Shorten your sentences

Too many long sentences make your text difficult to read, while short sentences keep the subject clear. When the sentences in your text are short, you allow your readers to absorb the information in your text. As a result, they don’t need to use all their attention to decipher what you want to say. That is why we advise you to break down long sentences; your text will be much easier to read. 

And please, don’t think that by using short sentences, you will oversimplify your text. Let’s compare two short texts to show you what we mean. First, we have this sentence:

My favorite place to visit during weekends is my grandparents’ house near the lake, where we love to fish and swim, and we often take the boat out on the lake.

Did you find this sentence easy to read? Wasn’t it too lengthy, confusing, and difficult to process? Breaking it into two or more sentences can make it much clearer:

My favorite place to visit during weekends is my grandparents’ house. It’s near the lake, where we love to fish and swim. We also often take the boat out on the lake.

These few short sentences are much easier to read. Yet, you give the same information as in the long sentence, so there is no oversimplifying. Using short sentences keeps the subject clear and lets your readers absorb the information you’re presenting. 

2. Limit your use of difficult words

Words with four or more syllables are considered difficult to read, so try to avoid them where possible. Or try not to use them too much. For example, try words like small instead of minuscule, about instead of approximately, and use instead of utilize. We have the word complexity assessment in Yoast SEO Premium to help you with that.

If you want to reach a broad audience, you should also try to avoid using jargon. If you’re a medical expert, you’re probably familiar with terms like analgesic, intravenous, and oophorectomy. However, keep in mind that most people aren’t. When you can’t find a better alternative, make sure to explain it for users who might not know the word.

Conclusion

The Flesch reading score has been around for decades, and it is not going anywhere. It still offers a quick way to test whether your writing is easy to follow, and it continues to play a role in Yoast SEO. At the same time, the web has moved on, and so have we. By combining the score with modern checks like word complexity, you can create content that is not only readable but also effective in meeting your goals.

So next time you write a blog post, take a look at your Flesch reading score. Use it as a guide, not a rule. The result will be content that your readers and search engines will thank you for.

TLDR

• You should care about your score, but do not chase perfection. Balance readability with your audience’s needs
• The Flesch Reading Score measures how easy a text is to read, using sentence length and word length
• Scores range from 0 to 100: higher is easier. For example, 90–100 is very easy, 60–69 is standard, and 0–29 is very confusing
• It became popular in education, government, and publishing before being integrated into tools like Microsoft Word and SEO platforms
• In Yoast SEO, the Flesch reading score still exists in the Insights tab, but we now also use word complexity to provide more accurate feedback

Brendan Reid

Brendan is a seasoned writer with a particular interest in SMEs. What he really enjoys is being able to provide real, actionable steps that can be taken today to start making business better for everyone.

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How to create a good meta description

The meta description summarizes a page’s content and presents it to users in the search results. It’s one of the first things people will likely see when searching for something, so optimizing it is crucial for SEO. It’s your chance to persuade users to click on your result! This post will show you the characteristics of a good meta description and how Yoast SEO can help you get it right.

Did you get a red traffic light for the keyphrase in the meta description check in Yoast SEO? Read what this check does, and how to turn this traffic light green. Yoast SEO also checks the length of your meta description. Read about how that check works and how to write a concise meta description.

The meta description is an HTML tag you can set for a post or page of your website. In it, you can use roughly 155 characters to describe what your page is about. If you’re lucky, Google will show it beneath your page’s title in the search results. It allows you to convince search engine users that your page will offer what they are looking for.

In Google’s search results, this is where it can be displayed:

And this is what it looks like in the HTML code of the page:

The purpose of a meta description is simple: it needs to get someone searching with a search term on Google to click your link. In other words, meta descriptions are there to generate click-throughs from search engines.

Search engines say there is no direct SEO benefit from the meta description – they don’t use it in their ranking algorithm. But there is an indirect benefit: Google uses click-through rate (CTR) to determine whether you’re a good result. If more people click on your result, Google considers you to be a good result and will, based on your position, move you up the rankings. This is why optimizing your meta description is important, as is optimizing your titles.

Unfortunately, there is no guarantee that Google will display the description that you’ve written. But, as there is a chance it will, adding it to your post or page is always worth the effort.

What does a good meta description contain?

Here’s a list of elements you need to write a good meta description:

1. Keep it up to 155 characters
2. Use an active voice and make it actionable
3. Include a call to action
4. Use your focus keyphrase
5. Show specifications when needed
6. Make sure it matches the content of the page
7. Make it unique

Let’s go over them in detail!

1. Keep it up to 155 characters 

The right length doesn’t exist; it depends on the message you want to convey. You should take enough space to convey the message, but keep it short and snappy. However, if you check the search results in Google, you’ll mostly see snippets of 120 to 156 characters, like in the example below. Google says you can make your meta descriptions as long as you want, but there is a limit to what we can see in the SERPs — and that’s around 155 characters; anything longer will get truncated.

Unfortunately, you can’t fully control what Google displays in the search results. Sometimes, it shows the meta description, and sometimes, it just grabs some sentences of your copy or generates something itself. Either way, your best bet is to keep it short. That way, if Google does decide to show the description you’ve written, it won’t be cut short. 

2. Use active voice and make it actionable 

If you see the meta description as an invitation to visit your page, you have to think about your user and their (possible) motivation to visit your page. Ensure your description isn’t dull, difficult, or too cryptic. People need to know what they can expect to find on your page.

The example in the image below is the description you should strive to write. It’s active, speaks to you, and addresses you directly. You know what you’ll get if you click on the link!

3. Include a call-to-action

“Hello, we have a new product, and you want it. Find out more!” This overlaps with what we said about the active voice, but we wanted to emphasize it again. The meta description is your sales text. In this case, the “product” you are trying to sell is the linked page. Invitations like Learn more, Get it now, Try for free come in handy, and we use them too.

4. Use your focus keyword

If the search keyword matches a part of the text in the meta description, Google will be more inclined to use it and highlight it in the search results. This will make the link to your site even more inviting. Google sometimes even highlights synonyms. In the example below, both the Academy Awards and Oscars are highlighted. Getting your results emphasized like that makes them stand out even more.

5. Show specifications, where possible 

If you have a product in your Shopify or WooCommerce store aimed at the tech-savvy, it can be a good idea to focus on the technical specs. For example, you can include the manufacturer, SKU, price, etc. If the visitor specifically seeks that product, you won’t have to convince them. Can the watch help us stay fit? Sign us up; that’s all we need to know. Note that to optimize your result in this manner, you should work on getting rich snippets.

6. Make sure it matches the content of the page

This is an important one. Google will find out if you use meta descriptions to trick visitors into clicking on your results. They might even penalize you if you do it. But besides that, misleading descriptions will also increase your bounce rate. Which will also lower people’s trust in your company. It’s a bad idea for that reason alone. That is why you want the meta description to match the content on the page.

7. Make it unique 

If your meta description is the same as those for other pages, the user experience in Google will be hampered. Although your page titles might vary, all pages will appear the same because all the descriptions are identical. Instead of creating duplicate meta descriptions, you’d better leave them blank. Google will pick a snippet from the page containing the keyword used in the query. That being said, writing a unique meta description for every page you want to rank is always the best practice.

Adding a meta description is easy if you’re on WordPress or Shopify and using Yoast SEO. Firstly, you can write it in the Search appearance preview section of Yoast SEO. But Yoast SEO also gives you feedback on it in the SEO analysis. The plugin checks the meta description length and whether you’ve used your focus keyphrase. So, let’s see how the plugin helps you and what you can do with it. 

Using AI to generate meta descriptions in Yoast SEO Premium

Yoast SEO Premium has our Yoast AI Generate features, which include AI-powered meta description generation. This meta description generator brings the power of generative AI to your fingertips, producing engaging and SEO-optimized meta descriptions with just one click. Using advanced algorithms and machine learning techniques, it generates creative and appealing meta descriptions, captivating your audience while meeting search engine standards.

This feature simplifies your meta description optimization process and fully complies with best SEO practices. It enhances user experience, amplifies your website’s visibility, and effortlessly directs high-quality, organic traffic to your site. With this outstanding AI generator, effortlessly elevate your SEO performance and generate outstanding meta descriptions that set you apart.

What does the keyphrase in meta description assessment in Yoast SEO do?

This check is all about using the keyphrase in the meta description. A focus keyphrase is the search term you want a page to rank for. When people use that term, you want them to find your page. You base your keyphrase on keyword research. After your research, you should end up with a combination of words that most of your audience will likely search for. We’ve already discussed that when you use your keyphrase in the meta description, Google will likely highlight it. That makes it easier for people to see they’ve found what they are looking for. 

Yoast SEO checks if and how often you use the words from your focus keyphrase in the meta description text. In addition, if you use Yoast SEO Premium, it also considers the synonyms you enter. If you overdo it, the plugin advises you to limit the use of your focus keyphrase.

How to get a green traffic light for the keyphrase in meta description

You’ll get a red traffic light if you don’t mention the keyphrase in the meta description. So, make sure to write one. But don’t stuff your meta description with your keyphrase because that will also get you a red traffic light. And make sure to mention all the words from your keyphrase near each other. Search engines are pretty smart nowadays, but you must clarify what your page is about. 

Yoast SEO Premium plugin considers the synonyms you’ve added when it performs its analysis. This allows you to write more naturally, resulting in a more pleasant text. Moreover, it’s easier to score a green traffic light this way. Use it to your advantage!

What does the meta description length assessment do?

This meta description length assessment measures whether your description is too short (less than 120 characters) or too long (more than 156 characters).  You’ll get a green traffic light when your meta description has the right length. If it’s too long or too short, you’ll get an orange traffic light in the SEO analysis of Yoast SEO (or red if you’ve marked your article as cornerstone content).

How to write a concise meta description

A good meta description convinces people that your page offers the best result for their query. But, to be the best result, you must know what people seek. What is their search intent? Are they looking for an answer to a question? If they are, try to give them the most complete answer. Are they looking for a product? Write down what makes your product stand out and why they would best buy it in your store. Be concise and convincing!

You get real-time feedback on the meta description length in the Search appearance section in the Yoast SEO sidebar or meta box. Click “Search appearance” in the Yoast SEO sidebar to write a meta description. This will open the snippet editor, and you’ll see input fields for editing the SEO title, the slug, and the meta description. When you start typing in the meta description input field, the snippet preview at the top of the Search appearance editor will immediately show your new text. Underneath the input field, there is a bar. It’s orange when you start typing and will become green when you’ve added enough information. When you add too much text, it will turn orange again.

Writing or editing your meta description in the Yoast SEO meta box underneath your post editor is also possible. Go to the SEO tab in the meta box (if it’s not on this tab by default), and you can start typing in the field under Meta description immediately.

What to do if you need meta descriptions for a lot of pages?

After reading this, do you need to change all your meta descriptions? But are you not sure how to fit that into your schedule? Google has the answer:

“If you don’t have time to create a description for every single page, try to prioritize your content; at the very least, create a description for the critical URLs like your home page and popular pages.“

Advice from Google Search Central documentation

You can check which of your pages ranks highest with Google Search Console. Take it from there. It’s also possible to optimize your meta descriptions with variables in Yoast SEO. This allows you to speed up this process without worrying about duplicate descriptions.

If you prefer to write a unique description for each page and have much to get through, you can use the Bulk editor tool in Yoast SEO for WordPress. Head to the Tools page, click ‘Bulk editor’, then select the ‘Description’ tab. You’ll be able to see any meta descriptions already set for your pages, and you can quickly add new ones without opening each page individually. However, with this tool, you won’t get warnings if your description is too short/long, or if the focus keyword is missing.

Preventing snippets with Yoast SEO

Yoast SEO provides an easy way to control search result snippets using the nosnippet meta tag feature. This setting lets you prevent Google from displaying any snippet for particular pages, giving you control over what appears in search results. It’s especially useful when you want to prioritize privacy or ensure that content is not shown without its full context. With the nosnippet tag, you have another way to manage snippet creation and to align everything with your content strategy.

Do you have Yoast SEO? Check the Social media appearance in the Yoast SEO sidebar or social tab in the Yoast SEO meta box below your post or page. You can add a separate description for your social media channels there. In Yoast SEO Premium, you even have social previews that show you what your post or page will look like when shared on social media.

Conclusion to meta descriptions

Meta descriptions are a crucial yet often underestimated component of SEO — even if these are not fully in your control. It serves as a brief advertisement for your content in search results, influencing click-through rates and user engagement. Crafting clear, compelling, and keyword-rich meta descriptions can significantly enhance your online visibility. In return, it could attract more targeted traffic to your website. While they may not directly impact rankings, their role in driving clicks and conversions is undeniable.

A well-crafted meta description is not just about SEO; it’s about creating a better user experience by providing searchers with a clear, concise preview of what to expect on your page. Of course, Google might think it knows better than you, but that doesn’t mean you shouldn’t put your best foot forward!

Read more: How to use the Google preview in Yoast SEO »

Edwin Toonen

Edwin is an experienced strategic content specialist. Before joining Yoast, he worked for a top-tier web design magazine, where he developed a keen understanding of how to create great content.

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