Text analysis for writers: word counts, reading time, and readability
A text-analysis tool gives you quick objective counts and readability numbers for any text you paste. Used alongside your editing judgment, these numbers help you tighten drafts faster, spot density issues, and ship cleaner copy. Here's what each measurement means and where to put it to work.
The four objective counts
Four reliable counts that work the same in any tool:
- Word count: usually within 1–3% of typical word processors. Differences come from hyphenated terms, URLs, and contractions, which every tool tokenizes slightly differently.
- Character count (with and without spaces): exact. Same as
.lengthin JavaScript. - Sentence count: splits on
. ! ?. Around 90% accurate; trips on abbreviations ("Dr. Smith" looks like two sentences). - Paragraph count: counts blank-line separated chunks.
Reading time: a useful estimate, not a measurement
Reading time is words ÷ words-per-minute. The publishing convention is 225 wpm (the figure most blogs use). Real reading speed varies hugely:
- Casual phone browsing: 150–180 wpm
- Average desktop reading: 200–250 wpm
- Speed-readers / skimmers: 400+ wpm
- Technical or academic text: often half normal speed
So a "5 min read" badge is a useful ballpark for setting reader expectations and planning content length.
Two character-based readability formulas
Two well-established readability formulas give you a quick objective grade-level number for any text. Both use characters per word and sentence length, both measurements that any tool can capture precisely.
| Formula | Output | Inputs | Notes |
|---|---|---|---|
| Coleman-Liau | Number from formula | Letters per 100 words + sentences per 100 words | 1975 formula. Lightweight and works on any plain text. |
| ARI | Number from formula | Letters/word + sentence length | 1967 formula. Long used in education and training materials. |
Where the numbers work, and where judgment takes over
Readability numbers are a good editing companion. They flag long sentences and dense words at a glance, which is what they were designed to do. They complement your judgment on everything they can't measure: whether the writing is interesting, whether the point is clear, whether the tone matches the audience, whether a longer word is the right word.
A page of Lorem Ipsum scores "Difficult" because it has long Latin-derived words and long sentences. A children's book of short words and short sentences scores "Very simple." Both numbers need context to be useful.
The most useful way to read the score
Compare two drafts of the SAME article. If draft B's grade-level number is lower than draft A's, you tightened it. The trend across edits is the most reliable signal.
Where this tool helps most
- Blog drafts before you publish. Catch overlong sentences and word counts that drift from your target length.
- Long-form articles and guides. Check reading time matches your audience's attention budget.
- Email newsletters. Keep paragraphs short and word counts in range.
- Product pages and marketing copy. Make sure descriptions are scannable, not dense.
- Documentation and help articles. Keep instructions short enough to follow on a phone screen.
When to use pixel-counting instead
Character count is right for paragraph-level analysis: drafts, articles, blog posts. For titles and meta descriptions that need to fit a specific space in search results, pixel-width is the right measurement because search engines use proportional fonts where letter widths vary.
How to actually use a text-analysis tool
- Paste your draft. Note the word count and the two readability numbers.
- Edit for tightness. Cut filler. Split long sentences. Swap academic words for everyday ones, where it makes sense, not as a rule.
- Re-paste and compare. Did the grade-level numbers come down? Did word count drop without losing meaning? Good signal.
- Stop when the numbers stop moving meaningfully. Don't optimize for the score itself. Once changes start sounding worse to your ear, you're done.
- Trust your judgment alongside the number. The formulas are quick objective signals; your reading sense fills in everything they can't measure.
Try it on your own writing
Counts, reading time, two readability scores, long-sentence highlighter. All live in your browser.
Tips for getting the most from these numbers
- Read the trend, not the absolute number. The two formulas can land on different grade levels for the same text. The direction your score moves across edits is the most reliable signal.
- Use the formulas for your own editing. Search engines don't publish readability targets, so the numbers are best treated as a personal craft tool rather than a ranking signal.
- Let the score follow the writing, not the other way around. Make a change because it improves the sentence. If the score moves with it, that's a nice bonus.