Long, winding sentences can bury the main point and tire a reader out, even when each individual clause is grammatically fine. This tool measures every sentence in your text and flags the ones running longer than a limit you set.
It calculates the average sentence length across the whole text, identifies the single longest sentence, and counts how many sentences exceed your chosen word threshold — a quick way to spot pacing issues at a glance.
Editorial guidance commonly suggests keeping most sentences under roughly 20-25 words for general readability, though this varies by genre and audience — technical or academic writing can reasonably run longer.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
This kind of task shows up constantly in everyday writing, coding, design, and admin work, which is exactly why a dedicated, focused tool saves so much back-and-forth.
A tool that does one job well, without a cluttered interface or unrelated features competing for attention, tends to be faster to use than a heavier all-in-one app.
If you find yourself needing this conversion or calculation often, keeping this page open in a tab is usually faster than digging through a bigger software suite's menus.
Frequently asked questions
What's a good average sentence length?
General audience writing often aims for an average around 15-20 words per sentence, though variety in length (mixing short and long) tends to read better than uniform length.
Does a long sentence always mean bad writing?
Not necessarily — well-constructed long sentences can work fine, especially in certain genres, but consistently long sentences throughout a piece often signal an opportunity to break some up for clarity.