Count sentences, estimate reading time, and review average sentence length for any text block.
If this tool isn’t working as expected, please take a screenshot of the error and report the problem here so we can investigate and improve it.
Sentence count and average sentence length are useful readability signals - a lower average generally reads easier, while a long "longest sentence" can flag copy that needs tightening. Reading time uses the same 200-words-per-minute estimate as this site's Word Counter, so the two tools agree on timing.
This tool detects sentence boundaries with a punctuation-based regex, not a language model - it does not recognize abbreviations, decimal numbers, or quotation marks as exceptions, so text containing those will split into more "sentences" than a human reader would count.
A sentence counter that splits pasted text on periods, question marks, and exclamation points to report a sentence count, average words per sentence, an estimated reading time, and a preview of the longest sentence - using straightforward punctuation matching rather than language-aware sentence detection.
Add the copy, article, or message you want to analyze.
The tool detects sentence breaks and totals the result instantly.
Review estimated reading time and average sentence length.
Use the longest-sentence preview to spot lines that may need shortening.
Add the article, essay, or message you want to analyze into the input box.
Check sentence count, average words per sentence, and estimated reading time, updated instantly as you type.
Read the longest-sentence preview to spot a line that may need to be shortened.
Use the Reset button to clear the text and start again with a new draft.
Best For
Input
"Dr. Smith arrived. He was late."Result
3 sentences: "Dr", "Smith arrived", "He was late"The period after "Dr" is treated as a sentence end because the splitting regex has no abbreviation list - any period, question mark, or exclamation point ends a sentence, regardless of context.
Input
"The value is 3.14 today. That is pi."Result
3 sentences: "The value is 3", "14 today", "That is pi"The decimal point inside "3.14" is counted as a sentence-ending period for the same reason - the tool has no way to distinguish a decimal point from a sentence-ending period.
Paste an essay or blog post to see the sentence count and average sentence length at a glance.
Use the longest-sentence preview to find a run-on sentence worth splitting into two.
Reading time uses the same 200 words-per-minute formula as this site's Word Counter, so the two agree on timing.
Paste each draft in turn and compare the Avg Words / Sentence figure to judge which reads more simply.
Problem
Solution
"Dr.", "Mr.", "e.g.", and similar abbreviations are not special-cased - each period inside them ends a "sentence" and inflates the count.
Problem
Solution
A number like "3.14" is split at the decimal point, since the tool cannot distinguish it from a sentence-ending period.
Problem
Solution
This tool does not display a standalone word, character, or paragraph count - use the Word Counter for those totals.
Problem
Solution
Only reading time is calculated. There is no speaking-time or presentation-duration feature.
If you need word count, character count, or paragraph count, use the Word Counter - this tool focuses on sentence-level structure instead.
If your text includes abbreviations or decimal numbers, the real sentence count is lower than what's shown.
It's measured by character length, not word count, so use it alongside the average-length figure to judge readability.
Sentence detection only recognizes the ASCII period, question mark, and exclamation point - text using other scripts' sentence-ending punctuation will undercount.
Sentences are detected with the regex /[.!?]+/ - any run of periods, question marks, or exclamation points ends a sentence, with no abbreviation or decimal-number exceptions.
Text like "Dr. Smith arrived." is counted as more sentences than a human reader would count, because "Dr." ends in a period.
A number like "3.14" is split at the decimal point into two "sentences."
Only sentence count, average words per sentence, reading time, and longest sentence are calculated - word counts are used internally for the average but never displayed on their own.
Only reading time (200 wpm) is calculated. There is no separate speaking or presentation-duration figure.
The "longest sentence" preview picks the sentence with the most characters, which is not always the sentence with the most words.
Non-Latin sentence terminators, such as the Urdu/Arabic full stop "۔", are not recognized as sentence boundaries, which can severely undercount sentences in text that doesn't use the ASCII period.
Both analyze pasted text, but they report different things.
| Sentence Counter | Word Counter | |
|---|---|---|
| Focus | Sentence-level structure - count, average length, longest sentence | Overall text totals - words, characters, and reading time |
| Word count displayed | No - words are only used internally to calculate the average | Yes - a headline stat |
| Reading time formula | 200 words per minute | 200 words per minute (same formula) |
| Speaking time | Not calculated | Not calculated |
Sentence counter visitors most often want to know how sentences are actually detected, since punctuation-based splitting behaves differently from careful human counting on text with abbreviations or decimal numbers. The FAQ below explains the exact splitting rule, what "longest sentence" measures, and how reading time is calculated.
It splits your text wherever it finds one or more periods, question marks, or exclamation points in a row - a punctuation regex, not language-aware sentence detection. There's no abbreviation list, decimal-number handling, or quotation-mark awareness.
Two, or more precisely three text segments in that example. The period after "Dr" is treated as a sentence end just like any other period, so abbreviations inflate the count above what a human reader would count.
Yes. The tool can't distinguish a decimal point from a sentence-ending period, so "The value is 3.14 today" is split at the decimal point.
No. Only reading time is calculated, using a fixed 200 words-per-minute estimate. There's no separate speaking-time or presentation-duration figure.
No. It's the sentence with the most characters, which isn't always the sentence with the most words - a sentence with a few long words can be picked over one with more, shorter words.
No. Word counts are used internally to calculate the average words-per-sentence figure, but they aren't displayed on their own - use the Word Counter for standalone word and character totals.
It works on any text using the ASCII period, question mark, or exclamation point as sentence enders. Scripts that use different sentence-ending punctuation, such as the Urdu/Arabic full stop "۔", aren't recognized, which can severely undercount sentences.
No. CoditTools's sentence counter runs entirely in your browser - your text is never sent to any server.
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