Online Sentence Counter

A sentence ends at a full stop, question mark, or exclamation mark followed by a space or a line break. A closing quote or bracket after the mark still counts, so dialogue such as She said "Hi." Then she left. is two sentences. Each line of a list counts as one sentence even without a full stop, and a last sentence with no punctuation at the end still counts. A line break in the middle of a sentence, where the next line starts with a lowercase letter, does not end it. For best results, use conventional punctuation so every sentence ending is clearly marked.

Sentence counting is useful in a variety of writing and editing scenarios. Teachers and students rely on it when assignments specify a minimum or maximum sentence count. Content writers use it to gauge readability, since shorter sentences generally improve clarity. Editors find it helpful for assessing text density and pacing during revisions. It is also valuable for anyone preparing summaries, abstracts, or social media posts where conciseness matters and every sentence needs to earn its place. If you also need to analyze word usage, the word frequency counter pairs well with sentence counting for a more complete picture of your writing. And if you need sample text with a set number of sentences to test against, our lorem ipsum generator can produce it.

Sentence length is one of the primary variables in readability scoring systems. The Flesch-Kincaid Grade Level formula, used by educators and publishers, weights both average sentence length and average syllable count per word. A document scoring Grade 8 (US school year 8, approximately age 13-14) is considered broadly accessible. Average sentence lengths by reading level:

• Grade 6 and below (accessible for general public): average 11-14 words per sentence
• Grade 8-10 (news articles, general non-fiction): average 15-20 words per sentence
• Grade 12+ (academic, technical, legal writing): average 25+ words per sentence

Varying sentence length throughout a piece improves readability even at high grade levels. Short sentences after long ones create emphasis and pacing.

The tool identifies sentences by detecting terminal punctuation: full stops, question marks, and exclamation marks, as well as the equivalent marks in Chinese, Japanese, Hindi, Arabic, and Greek. Common abbreviations are not treated as sentence endings: "Dr.", "Mr.", "Mrs.", "Ms.", "Prof.", "St.", "vs.", "e.g.", "i.e.", "U.S.", and "No." before a number. Other abbreviations, such as "etc." or "Inc." followed by a capitalized word, are counted as the end of a sentence, so for writing with heavy abbreviation use, review the count manually.

Yes. Paste any length of text across any number of paragraphs and the tool counts all sentences in the full input.

For blog posts and web articles aimed at a general audience, 15-20 words per sentence is a common guideline. Shorter sentences (under 12 words) improve mobile readability. Aim for Grade 8 or below for broadly accessible content.

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