Why You Should Be Using ProWritingAid's Sentence Length Report

Hayley Milliman
Marketing and Customer Support Ninja
Published Oct 17, 2018


You know what's boring?

Reading a piece of work where every single sentence is exactly the same length.

Think about it.

When you use the same length or structure of sentence over and over again, your work will be repetitive and un-engaging.

Thankfully, ProWritingAid's sentence length report is here to help. Let's take a look at what it does.


  1. Using ProWritingAid's Sentence length Report
  2. What the Scores Mean
  3. Final Thoughts

Using ProWritingAid's Sentence length Report

This is the screen you see when you run the sentence length report:


The report takes you through the variety in sentence lengths in your piece, the average sentence length, and how many long sentences you have. It also provides you with a graph depicting a visual representation of the length of your sentences.

What the Scores Mean

The sentence structure length gives you three scores:

1. Sentence Variety Score

The sentence variety is calculated using a concept called standard deviation. This is a mathematical measure of variety from the average. The higher the standard deviation, the more your sentence lengths vary within the document.

2. Average Sentence Length

The average sentence length for most published writers is between 11 and 18 words. If your average is above 18, then your writing might be too verbose or complicated. If your average is below 11, your writing will likely feel choppy. Check your score and then rework your text if you need to.

3. Long Sentences

Long sentences are sentences over 18 words. As we noted before, long sentences may be too complicated for your readers. It's best to try to limit the number of long sentences in your work.

The graph helps you easily scan to find areas in your work that need more variety.

Final Thoughts

The ProWritingAid Sentence Length report helps you make sure that your writing is exciting to readers... not putting them to sleep.

Try it out the next time you're using one of ProWritingAid's many integrations!

Let us know what you think in the comments.

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Hayley Milliman
Marketing and Customer Support Ninja

Hayley is a former teacher turned writer who works for ProWritingAid as a marketing and customer support associate. Hayley loves writing content that's engaging and informative. Bonus points if it's about Star Wars. She co-wrote the book Museum Hack's Guide to History's Fiercest Females.