Sentence Counter
Count sentences in your writing with punctuation-aware detection.
- Reading time:
- 2 min
- Last updated:
- Price:
- Free, no signup
Type or paste text to see the result.
What the Sentence Counter does
Find out how many sentences are in your writing and how long they are on average. The counter splits text at full stops, question marks and exclamation marks, then reports the total and the average words per sentence.
Average sentence length is one of the simplest signals of how easy a text is to read. Most web copy reads comfortably at around 15–20 words per sentence.
Why the Sentence Counter is useful
A few 45-word sentences can make a whole page feel hard work. Seeing the average tells you whether to break things up before readers give up.
Teachers and students also use sentence counts for assignments like 'write five sentences about…' or summaries capped at a set number of sentences.
Also known as: sentence counter, count sentences, free sentence counter, online sentence counter, sentence counter online free, sentence counter tool, best sentence counter tool.
How to use the Sentence Counter
- 1
Paste the paragraph or essay
Include the final punctuation so the last sentence is counted.
- 2
Check total and average
Note the sentence count and words per sentence.
- 3
Split the long ones
Find sentences with several 'and' or 'which' clauses and turn them into two.
Key features
- Total sentence count
- Average words per sentence
- Handles ?, ! and . endings
- Live updates while editing
Benefits
- Clearer, easier-to-scan writing
- Meet 'number of sentences' assignment rules
- Objective check before sending to an editor
Real-life use cases
Primary school homework
A parent checks that a child's 'describe your weekend' task has the required eight sentences.
Help-centre article
A support writer brings the average down from 27 to 16 words per sentence so customers follow the steps more easily.
Tips for the best results
- Abbreviations like 'e.g.' or 'Dr.' can add an extra split — read the count as a close estimate.
- Aim for variety: mix short punchy sentences with medium ones.
- Bullet points without full stops are counted as part of one sentence.
Conclusion
Paste your text to see how many sentences it has and how long they run. If the average is over 20, split a few and read it again.
Frequently asked questions
How does it decide where a sentence ends?
- At a full stop, question mark or exclamation mark followed by a space or the end of the text.
What is a good average sentence length?
- About 15–20 words for general web reading. Technical or academic writing often runs longer.
Do abbreviations break the count?
- Sometimes. 'Mr. Khan' may be read as two sentences, so treat the total as a close estimate.
Are headings counted?
- A heading without end punctuation joins the next sentence. Remove headings for an exact count.
Does it count questions?
- Yes, anything ending in a question mark is a sentence.
Can it check other languages?
- It works for languages that use . ? ! as sentence endings, such as Spanish, French and German.
Related tools you may need
- Sentence Merger — Join one-per-line sentences back into flowing prose.
- Sentence Splitter — Break a paragraph into one sentence per line.
- Vowel Counter — Count vowels and their breakdown.
- Character Counter — Count characters with and without spaces — great for tweets and metas.
- Consonant Counter — Count consonants and the consonant ratio.
- Line Counter — Count total, non-empty and unique lines in any text.
- Paragraph Counter — Count paragraphs separated by blank lines.
- Reading Time Calculator — Estimate how long a piece of text takes to read aloud or silently.
Keep exploring
Browse the full tools directory, filter by category, or read guides on the Text Tools Hub blog.