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Sentence Counter

Count the sentences in your text and see how long they are on average. Average sentence length is one of the clearest signals of readability — most style guides suggest keeping prose under about 20 words a sentence.

Sentences

0

Words
0
Characters
0
Characters without spaces
0
Sentences
0
Paragraphs
0
Lines
0
Longest word
0 characters
Reading time
0 sec

Your text stays on your device

All counting happens in your browser. Nothing you type or paste is uploaded, stored or sent anywhere.

How to use this tool

  1. Paste the text you want to check.
  2. Read the sentence count and the average words per sentence beneath it.
  3. Long averages usually mean sentences worth splitting.

Notes and limitations

  • Sentences are detected by terminal punctuation: full stops, question marks, exclamation marks and their full-width equivalents.
  • Abbreviations inflate the count. 'Dr. Smith arrived.' reads as two sentences, because there is no reliable way to tell an abbreviation from a sentence ending without language-specific rules.
  • Text that ends without punctuation still counts as a sentence, so a heading or a fragment is included.
  • Average sentence length is a rough readability signal, not a score. Varying sentence length deliberately reads better than hitting a target.
  • Everything runs in your browser. Your text is never uploaded to a server, which matters when what you are working on is a draft, a client list or anything else you would rather not send anywhere.

Frequently asked questions

How are sentences counted?

By terminal punctuation — a full stop, question mark or exclamation mark, including the full-width forms used in Chinese and Japanese. A final fragment with no punctuation is counted too.

Why is the count higher than I expected?

Almost always abbreviations. 'Dr.', 'e.g.' and 'Ltd.' each look like a sentence ending. Distinguishing them reliably needs a dictionary for every language, so the tool states the limitation instead of guessing.

What is a good average sentence length?

For general readers, most guidance suggests 15 to 20 words. Technical and legal writing runs longer. The more useful test is whether the sentences vary — uniform length is monotonous regardless of the average.

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