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Get 6 readability scores on any copy in seconds with the free online WebFX tool

15 August 2019 (Edited 13 December 2019)

Whatever it is you want people reading your copy to do, more of them will do it if your copy is fast and easy to read and comprehend

It's a fact: readable copy converts better. Website copy, ad copy, e-mail copy. Whatever it is you want people reading your copy to do, more of them will do it if your copy is fast and easy to read and comprehend, and uses the language that your prospects themselves use when talking about offerings like yours.

A slick online tool that will give you - free and in just seconds - readability scores (US school grade levels) on any web page or piece of copy is available here from Pennsylvania-based Internet marketers WebFX: .

To test the tool, I sent it off to grade our ACRO Global agency ABOUT page , the top part of which looks like this:

At, to start the test, I just entered the URL and clicked the CALCULATE READABILITY button:

This immediately produced a one-sentence summary report, along with numerical scores for 6 different readability measures, and red-amber-green difficulty indicators:

Happily our page got no RED scores on any of the 6 scales!

Just so you appreciate all the work the WebFX tool has done for you, here's how these 6 readability measures are calculated:

Flesch-Kincaid Reading Ease

Unlike the other 5 measures that score by US school grade level, the Reading Ease score in on a 100-point scale

and requires a conversion table to get at grade level:

The Flesch-Kincaid Grade Level score comes from this formula:

The Gunning Fog Score comes from:

The SMOG Index from:

Coleman-Liau Index from:

L is the average number of letters per 100 words
S is the average number of sentences per 100 words

And the Automated Readability Index from:

After having done all that, at the bottom of the page the WebFX tool gives you - for your own fine-tuning pleasure - stats on your copy:

  • Number of sentences
  • Number of words
  • Number of "complex" words
  • % of "complex" words
  • Average words/sentence
  • Average syllables/word

Very slick. Happy editing!

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And if you have questions or comments, you can easily send them to me with the Quick Reply form, below, or send me an e-mail.

David Boggs    - David
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