Sentence Counter
Count sentences, analyze sentence length, and improve your writing rhythm
Understanding Sentence Length
Sentence length is one of the most important factors in readability. The average English sentence contains 15–20 words, but the best writing varies sentence length for rhythm and impact.
Short sentences create urgency. They pack a punch. They're easy to understand. Longer sentences, on the other hand, allow you to develop more complex ideas, connect multiple concepts, and guide the reader through nuanced reasoning — but they require more cognitive effort to parse.
The key is variation. A paragraph of all short sentences feels choppy and breathless. A paragraph of all long sentences feels dense and exhausting. The most engaging writing alternates between the two, using short sentences for emphasis and long sentences for development.
Sentence Length Guidelines by Context
Web content: Average 15–20 words per sentence. Readers scan online, so shorter sentences help. Academic writing: Average 20–25 words per sentence. Longer sentences are acceptable when developing complex arguments. Creative writing: Varies widely. Use sentence length deliberately as a pacing tool. Business writing: Average 15–18 words. Clarity and directness are paramount.
How to Improve Sentence Variety
Read your work aloud. If you fall into a rhythm where every sentence sounds the same length, you need more variation. Try opening some sentences with dependent clauses, others with the subject, and occasionally with a single word. "However." "Still." "Nevertheless." These one-word sentences create dramatic pauses that break monotony.
Use our sentence counter above to check your average sentence length, then use our readability analyzer to see how your sentence length affects overall readability.
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