Sentence Counter
Count sentences in your text. Useful for readability checks and writing assignments.
Oddly, neither Google Docs nor Microsoft Word will tell you how many sentences you've written. Words, characters, paragraphs - sure. Sentences, no. So when an assignment asks for "at least 25 sentences" or you want to know how long your sentences run on average, you need a separate counter.
Alongside the raw count, the editor highlights each sentence by length and shows the average words per sentence. That average is the fastest readability check there is: when it creeps past 25, the text almost always reads as heavy.
How the Sentence Counter Works
The tool scans your text for sentence-ending punctuation: periods, question marks and exclamation points. It's smart enough to skip common abbreviations like "Mr." and "U.S." so those don't get counted as separate sentences. Decimal numbers like "3.14" won't trip it up either.
That said, unusual formatting can throw off any counter. If you skip punctuation or use unconventional structures, the count might not be perfect. For standard English writing though, it's very accurate.
Why Sentence Length Matters
The average length of your sentences is one of the biggest factors in readability. Most readers start losing the thread when every sentence runs past 20 words. News writing often stays around 15-18 words, which is one reason it feels quick to read.
The trick isn't writing every sentence short. It's mixing them up. A few quick punchy sentences followed by a longer one with more detail creates a rhythm that keeps people reading. Monotonous sentence length - whether all short or all long - makes text boring.
Sentence Length Guidelines by Content Type
- Blog posts and social media: 12-17 words per sentence
- General articles and emails: 15-20 words per sentence
- Academic essays and reports: 20-25 words per sentence
- Legal or technical writing: 25+ words (not great for general audiences)
Sentences Per Paragraph
There's no universal rule here. For web content, 1-3 sentences per paragraph is the sweet spot. Academic writing usually runs 3-8 sentences. Business emails and reports land somewhere in the middle at 3-5 sentences. The main idea is to keep one point per paragraph regardless of the format.
How to Use
- Type or paste your text into the box above.
- Your sentence count shows up instantly and updates as you type.
- Check the average words per sentence to see if your writing is easy to read.
Frequently Asked Questions
Can Google Docs or Word count sentences?
Neither Google Docs nor Microsoft Word has a built-in sentence counter - they track words, characters and paragraphs and stop there. For sentence counts you need a separate tool like this one.
How does it handle abbreviations like Mr. or Dr.?
The tool recognizes common abbreviations and doesn't count them as sentence endings. Things like Mr., Mrs., Dr., U.S. and similar abbreviations are filtered out automatically.
What's a good average sentence length?
For web content, shoot for 15-20 words per sentence. News articles average about 15-18 words. If your average is over 25, most readers will have trouble following along.
Does sentence length really affect readability?
Shorter sentences are easier to process, especially on screens. The real trick is variety, though - mix short and longer sentences so the writing keeps a natural rhythm.
Does it work with languages other than English?
It works with any language that uses standard punctuation marks for sentence endings (periods, question marks and exclamation points). Languages that use different punctuation systems may give less accurate results.
Can I use this for school essays?
Plenty of students use it exactly for that: hitting sentence count requirements and checking that sentences aren't all the same length. Varied sentence structure is something teachers actively look for.