Why is Dr. counted as its own sentence?

Because Unicode sentence boundaries treat an abbreviation followed by a period and then a capital letter as a break. The tool reports the rule it uses instead of applying a hidden English-only abbreviation list.

What is a good average sentence length?

Between 15 and 25 words is typical for readable English nonfiction. The useful signal is variation: a document where every sentence is 35 words long is harder to read than one that alternates long and short.

Does the tool list every sentence?

The summary counts every sentence in the document. The list shows the first twenty-five so the page stays responsive with very long documents, and says how many are not listed.

How is a word counted inside a sentence?

With the same Unicode word-boundary rule used across this domain: numbers count as words, hyphens join compounds, and standalone punctuation is not a word.

Is the text sent anywhere?

No. Segmentation and counting happen entirely in your browser; nothing is uploaded or stored.

Sentence Count Tool

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Counts

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Count the sentences in a text and see each one with its own word count, so you can find the sentences that are carrying too much or too little.

What is Sentence Count Tool?

Sentence length is the simplest measure of whether prose is readable, and a sentence count is where that measurement starts. The Sentence Count Tool splits your text into sentences using Unicode sentence boundaries, counts them, and then lists each sentence with its word count so you can see the distribution rather than just the total.

The summary gives you the numbers you would otherwise calculate by hand: total sentences, total words, the average words per sentence, and the longest and shortest sentences with their positions in the text. Average sentence length in English nonfiction typically sits between 15 and 25 words; a paragraph averaging over 30 is usually a candidate for splitting, and one averaging under 10 can read as choppy. The point is not to hit a number but to see where your draft sits and whether the variation is deliberate.

The sentence list is the working part of the tool. Each sentence appears with a word count beside it, so a 58-word sentence stands out immediately in a list of 12-word sentences. Writers, editors and students use this to spot the sentence that should have been three, or the run of short sentences that reads like a list rather than a paragraph. Clicking through with the {{focus-sentence-highlighter|Focus Sentence Highlighter}} is the natural next step when you want to work on one sentence at a time.

Sentence segmentation follows the same Unicode boundary rules used by browsers, which means abbreviations behave predictably and, importantly, honestly. "Dr. Smith went home." is reported as two sentence segments because a period after an abbreviation followed by a capital is a boundary under those rules. The tool says so on the page. The alternative — a hand-tuned abbreviation list — would be more accurate for English and less predictable for other languages, so the rule is stated instead of hidden.

Everything runs locally in the browser. Nothing is uploaded, there is no account, and the analysis is debounced so that a long document does not stutter while you type. Large texts are handled exactly; the preview list is capped at the first twenty-five sentences so the page stays responsive, and the total still covers the whole document.

A sentence count pairs naturally with a word count when you are judging readability: the same 500 words in 12 sentences reads differently from the same 500 words in 30. To see the whole-document numbers, use the {{word-count-tool|Word Count Tool}}; to see how long the text takes to read at that sentence length, use the {{reading-time-estimator|Reading Time Estimator}}.

Working with a sentence counter changes how a draft reads. When you count sentences rather than estimate them, a paragraph of nine short segments behaves visibly differently from three long ones carrying the same word count, and the total shows it. Because the tool lists the sentences it found, a split caused by an abbreviation is visible rather than mysterious, and the average words per sentence supplies the summary figure most style guides actually care about. If a number looks wrong, the list is where the explanation is, not a footnote.

How to use Sentence Count Tool

Paste your text into the box.
Read the headline sentence count and the average words per sentence underneath.
Check the longest and shortest rows, which name the sentence number so you can find them quickly.
Scan the sentence list for outliers — long sentences show their word count beside them.
Copy the summary if you want to track the numbers across drafts.

When to use Sentence Count Tool vs related tools

Use the sentence count when you are editing for rhythm and clarity: a draft with an average above 30 words per sentence or a long run of very short sentences needs attention. It is also the fastest way to check that a paragraph has not become one enormous sentence.

When the question is readability in a scored sense rather than a structural one, the reading time and word count tools give the supporting numbers, and when you want to revise a specific sentence, the Focus Sentence Highlighter isolates it. If the text mixes right-to-left and left-to-right runs, the RTL Text Tester checks that the segmentation and display direction behave as expected.

Privacy & Security

This tool runs entirely in your browser — no data ever leaves your device. There is no server round-trip, no upload, no logging, and no account required. Your input is processed locally using client-side JavaScript and is never stored, transmitted, or accessible to anyone else. When you close the tab, everything disappears.