Sentence Counter
Count sentences and analyze your writing structure
Paste your text to analyze sentences
Free Online Sentence Counter
Our free sentence counter tool counts sentences, words and paragraphs in your text and shows your average sentence length. It also identifies your longest and shortest sentences to help you improve your writing structure. No sign up required — just paste your text and get instant results.
Why Sentence Length Matters
Sentence length has a big impact on how easy your content is to read. Very long sentences with 30 or more words are hard to follow and can confuse readers. Very short sentences of 5 words or fewer can make writing feel choppy and disconnected. The ideal average sentence length for web content is 15 to 20 words. Varying your sentence length — mixing short punchy sentences with longer ones — creates a natural rhythm that keeps readers engaged.
Frequently Asked Questions
What is the ideal sentence length?
For most web content, the ideal average sentence length is 15 to 20 words. Academic writing can have longer sentences, while marketing copy tends to use shorter sentences for impact.
How does the sentence counter work?
Our tool detects sentences by looking for punctuation marks like periods, exclamation marks and question marks. It then counts the total number of sentences and calculates the average words per sentence.
Is this sentence counter free?
Yes, completely free with no sign up required and no usage limits.