Sentence Counter

About This Tool

The Sentence Counter analyzes your text for structural metrics that affect readability and clarity. Beyond simple word and character counts, it calculates average sentence length, paragraph count, and Flesch-Kincaid readability scores. These metrics help writers, students, and content creators ensure their text is appropriate for their target audience.

Flesch-Kincaid Readability

The Flesch-Kincaid Grade Level indicates the US school grade level needed to understand the text. A score of 8.0 means an eighth grader can understand it. Most popular writing targets grade 6-8 for broad accessibility. The Reading Ease score runs from 0 to 100, where higher scores mean easier reading. Scores of 60-70 are considered standard, while anything above 80 is easy reading. Academic and legal writing often scores below 30.

Optimal Sentence Length

Research on readability consistently shows that 15-20 words per sentence is ideal for general audiences. Sentences under 10 words feel choppy if overused. Sentences over 25 words become hard to follow. The best writing mixes short and long sentences. Variety in sentence length creates rhythm and keeps readers engaged. A wall of uniform-length sentences, regardless of their individual clarity, becomes monotonous.