Sentence Counter — Readability

Count sentences, paragraphs, and get a readability score instantly.

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Sentence Counter — Key Numbers

15–20ideal words/sentence
3–5sentences per para
60–70ideal Flesch score
30–50academic Flesch

Frequently Asked Questions

How is sentence count calculated?
Sentences are counted by detecting punctuation endings — full stops, exclamation marks, and question marks. Abbreviations and decimal numbers may occasionally be counted as sentence endings.
What is a Flesch Reading Ease score?
The Flesch Reading Ease score rates text from 0 to 100. Scores of 60–70 are considered plain English suitable for most adults. Higher scores mean easier reading. Academic text typically scores 30–50.
What is the ideal sentence length?
The ideal sentence length for web readability is 15–20 words. Varying length keeps readers engaged — mix short punchy sentences with longer explanatory ones.
How many sentences should a paragraph have?
For online content, 3–5 sentences per paragraph is ideal. Short paragraphs improve readability and encourage readers to continue.

How to use the Sentence Counter

Paste or type your text

Type or paste your content into the counter above. Sentences, paragraphs, words, and characters are all counted instantly as you type.

Read your sentence stats

The sidebar shows total sentences, paragraphs, words, characters, average sentence length, and the longest and shortest sentences in your text.

Check your Flesch score

The Flesch Reading Ease score tells you how readable your text is. Aim for 60–70 for general audiences; higher for consumer brands, lower for academic writing.

About the Sentence Counter

Our free Sentence Counter goes beyond simple counting — it analyses the structure and readability of your writing. Alongside sentence, paragraph, word and character counts, it calculates your Flesch Reading Ease score — the industry-standard readability metric used by educators, publishers and content strategists worldwide.

The Flesch formula considers both average sentence length and average syllables per word. A score of 60–70 indicates plain English suitable for most adults. Academic writing typically scores 30–50. Consumer brands often aim for 70+. Use the score to calibrate your writing for your specific audience — whether you're editing a blog post, a student essay, or a product landing page.