Sentence Counter
Free sentence counter — count sentences, paragraphs, and average sentence length instantly. Recognizes common abbreviations like Dr. and Inc. so it doesn't miscount. Runs in your browser.
How a Sentence Counter Works
A sentence counter takes your text and splits it on the standard sentence-ending punctuation: periods, exclamation points, and question marks. Each resulting fragment with at least two words is counted as a sentence. Sounds simple — but real text is full of edge cases.
Handling Abbreviations
The biggest challenge is abbreviations. "Mr. Smith went to the store" should be one sentence, not two. The counter recognizes common abbreviations (Mr, Mrs, Dr, Prof, Inc, Ltd, Corp, etc, vs) and ignores periods that follow them. It also detects decimal numbers like "3.14" or "$5.99" so those don't trigger false splits.
What Makes a Good Sentence
Good prose mixes sentence lengths. Hemingway's average was 14 words. Faulkner could write sentences over 1,000 words. Both worked because they varied. A typical guideline for clarity: average 15-20 words per sentence, with no single sentence exceeding 25-30 words. The counter shows your average and longest sentence so you can spot issues quickly.
Sentences vs Paragraphs
Most paragraphs contain 3-7 sentences. Web writing trends shorter, often 1-3 sentences per paragraph for skimmability. Academic writing tends longer, sometimes 6-10 sentences. The counter shows both metrics so you can adjust pacing for your medium and audience. For full writing analysis including passive voice and readability, try the Text Analyzer. To count individual words, use the Word Counter.
Frequently Asked Questions
- How does this sentence counter work?
- It splits your text on sentence-ending punctuation — periods, exclamation points, and question marks — then counts each resulting fragment that contains at least two words. Common abbreviations like Mr., Dr., Inc., and decimal numbers like 3.14 are recognized so they don't trigger false splits.
- How does it handle abbreviations like Dr. or Mr.?
- The counter recognizes a list of common title and business abbreviations: Mr, Mrs, Ms, Dr, Prof, Sr, Jr, St, vs, etc, Inc, Ltd, Corp. Periods after these don't end sentences. It also detects decimal numbers like 3.14 or version 1.2.3 and treats those periods as part of the number, not as sentence boundaries.
- What's a good average sentence length?
- For general audiences, aim for 15-20 words per sentence on average. Below 10 words feels choppy and simplistic. Above 25 words becomes harder to follow. Hemingway averaged 14. Academic writing tends toward 22-25. Mixing short and long sentences creates rhythm and keeps readers engaged.
- Why should I count sentences?
- Sentence count affects readability, reading time, and pacing. Long-form articles typically have 30-50 sentences per 1,000 words. Social posts often have 1-5. Email greetings get 2-3. Knowing your sentence count helps you adjust pacing for the medium and audience.
- How do paragraphs differ from sentences?
- A sentence is a complete thought ending in punctuation. A paragraph is a group of related sentences usually separated by a blank line. Most paragraphs contain 3-7 sentences. Some platforms (like Twitter) ignore paragraphs entirely. Long-form writing benefits from clear paragraph breaks every 3-5 sentences for visual rest.
- Does this work for non-English text?
- It works for most Western languages that use period, exclamation, and question mark to end sentences (Spanish, French, German, Portuguese, Italian). It does not work well for languages with different sentence-ending marks like Chinese (。), Japanese, or Arabic. For those languages the counts will be unreliable.