Sentence Length Analyzer Tool Overview

Our Sentence Length Analyzer is perfect for getting a deeper look at your sentence structure. Writers, students, and editors can use it to find the right balance between short, punchy sentences and longer, descriptive ones. Mixing sentence lengths keeps readers engaged and makes your writing easy to follow. For more readability insights, check out our Readability Calculator.

To use, just enter your text below and hit "Analyze." The tool will show you details on average sentence length, variability, and complexity. Need to check for passive voice? Try our Passive Voice Detector.


Sentence Length Analyzer

Your Results

Sentence Analysis:

Number of Sentences...
Average Sentence Length0.00
Sentence Variability Index0.00
Longest Sentence Length... words
Shortest Sentence Length... words
Complex Sentence Count...
Average Word Length0.00 characters
Sentence Complexity Index0.00

Understanding Sentence Length Metrics

Number of Sentences

This shows how many sentences are in your text. More sentences generally mean shorter, simpler writing, while fewer may indicate longer, more detailed sentences.

Average Sentence Length

This is the average number of words per sentence. Shorter sentences are typically easier to read, while longer ones add detail but may require more focus. For overall word count, use our Word & Character Counter.

Sentence Variability Index

This score shows the variety of your sentence lengths. A higher score means a good mix of short and long sentences, creating a balanced flow in your writing.

Longest Sentence Length

This tells you the word count of your longest sentence. If it’s very long, consider breaking it up for clarity.

Shortest Sentence Length

This metric shows the word count of your shortest sentence. While short sentences are easy to read, too many can feel choppy. Aim for balance.

Complex Sentence Count

This counts the number of complex sentences, which often contain multiple clauses. Simplify complex sentences with our Passive Voice Detector.

Average Word Length

Shows the average number of characters per word. Higher averages can mean more advanced vocabulary, which may be harder to read.

Sentence Complexity Index

This index measures how complex your sentences are, factoring in length and structure. A high score often indicates more intricate sentence styles.