Why sentence counting is harder than it looks
The naive approach is to split on every full stop. It falls apart immediately:
- Dr. Smith visited Washington D.C. last week. — one sentence, three full stops.
- The reading was 3.14 volts. — one sentence, two full stops.
- "Stop!" she said. — one sentence, and the terminator sits inside the quotes.
- J. R. R. Tolkien wrote it. — one sentence, four full stops.
- A bulleted list with no punctuation at all — several sentences, no terminators.
This counter handles all of these. It knows a list of common abbreviations, keeps initials together, leaves decimals alone, allows a terminator to sit inside closing quotes or brackets, and treats a line break as the end of a sentence so headings and list items are counted rather than swallowed into the paragraph before them.
It also distinguishes titles from other abbreviations. Dr. never ends a sentence. Inc. might — so if the next word is capitalised, we treat it as a boundary, and if it is lowercase, we do not.
Average sentence length, and what to do with it
The panel above reports words per sentence. As a rough guide for general readers, an average of 14 to 20 words reads comfortably; over 25 tends to feel heavy. The average matters less than the variation, though. A page of identical 18-word sentences is duller than a page that mixes six-word sentences with thirty-word ones. Use the number to find the paragraph that needs breaking up, not as a target to write towards.
How each count is defined
Most counters give you a number and never tell you what they measured, which is why three tools can disagree about the same paragraph. Here are our rules, in full.
- Characters
- Grapheme clusters — what a human would point at and call one character. An emoji like 👨👩👧 counts as 1, not 5. Accented letters count as 1 whether they were typed as a single character or as a letter plus a combining accent.
- Words
- A run of letters or digits, held together by apostrophes, hyphens and internal
periods.
don't,state-of-the-art,3.14andU.S.A.are each one word. Links and email addresses count as one word each. - Sentences
- Text ending in
.!?or…, followed by a space or the end of the text. Titles like Dr. and Mt. never end a sentence, initials like J. R. R. are held together, and decimals such as 3.14 are left alone. A line break also ends a sentence, so headings and bullet points are counted properly. - Vowels
- A, E, I, O, U, plus their accented forms — café has two vowels, naïve has three. Y is handled by whichever rule you pick above.
- Consonants
- Every other letter. Digits, spaces and punctuation are neither vowels nor consonants, which is why vowels plus consonants is smaller than your character count.
One thing worth being clear about: this counts letters, not sounds. Queue has four vowel letters and one vowel sound. If you need phonetic syllables rather than written vowels, the syllable estimate in the panel above is closer to what you want.
Common questions
How do I count the number of sentences in a paragraph?
Paste the paragraph into the box on this page. The sentence count appears immediately, alongside the word count and the average number of words per sentence.
Does the counter get confused by abbreviations like Dr. or U.S.A.?
No. Titles such as Dr., Mr., Prof., St. and Mt. never end a sentence. Initials like J. R. R. are kept together, decimals such as 3.14 are ignored, and abbreviations like Inc. or etc. are judged on whether the following word is capitalised.
Is a heading or bullet point counted as a sentence?
Yes. A line break ends a sentence here, so a heading or a bullet with no full stop still counts as one. Without that rule an entire bulleted list would count as a single sentence.
What is a good average sentence length?
For general audiences, roughly 14 to 20 words per sentence reads easily. Technical writing runs longer. Varying the length matters more than hitting any particular average.
How is a sentence ending in "?!" counted?
As one sentence. A run of terminators such as ?! or ... is treated as a single ending, not as several.
Does it count sentences in real time?
Yes, the count updates as you type or edit, with nothing to submit.