読書時間推定
テキストの読書時間を推定します。単語数・文字数・段落数も表示。
What Is the Reading Time Estimator?
The reading time estimator is a free online tool that calculates how long it takes to read any piece of text. Paste an article, blog post, essay, or any written content and the tool instantly shows the estimated reading time alongside word count, character count, and paragraph count. It is commonly used by writers, editors, content marketers, and bloggers to gauge article length before publishing.
Reading time estimates help set reader expectations. Medium, Substack, and most modern publishing platforms display reading time prominently because readers use it to decide whether to engage with an article. This tool lets you calculate that estimate before you publish, using the same word-count-divided-by-WPM formula those platforms use.
How to Use the Reading Time Estimator
- Paste your article or text into the input area.
- Select a reading speed preset: Slow (150 WPM), Average (238 WPM), or Fast (350 WPM).
- Or drag the slider to set a custom words-per-minute value.
- The reading time, word count, character count, and paragraph count update instantly.
Features
- Instant reading time calculation as you type
- Three preset reading speeds: slow, average, and fast
- Custom WPM slider from 50 to 800 words per minute
- Word count, character count, and paragraph count
- Sample text to demonstrate the tool
- Runs entirely in your browser — no data sent to servers
FAQ
How is reading time calculated?
Reading time is calculated by dividing the total word count by your selected reading speed in words per minute (WPM). The average adult reads at around 238 WPM for non-fiction text.
What is the average reading speed?
The average adult reads at approximately 238 words per minute for non-fiction. Slow readers average around 150 WPM, while fast readers can reach 350 WPM or more. Speed reading techniques can push this higher, though comprehension may decrease.
Can I use a custom reading speed?
Yes. Use the slider to set any reading speed between 50 and 800 WPM. The reading time estimate updates instantly as you adjust the slider.
Does this tool send my text to a server?
No. All processing happens entirely in your browser. Your text is never sent to any server.