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Which numbers are exact and which are estimates

Worth separating, because they are usually presented together as though they carried the same authority.

Exact: character count with and without spaces, line count, paragraph count. These are counting operations with no judgement in them.

Close enough: word count. Splitting on whitespace is right almost always and disagrees with a human on hyphenated compounds, contractions and numbers with separators. Different tools give slightly different totals for the same text and none of them is wrong.

Estimated: sentence count and reading time. The [msm_tool slug="text-statistics"] reports both and neither is a measurement.

Sentence counting is a heuristic

Sentences are detected by looking for terminal punctuation. That works until it meets ordinary English:

• Abbreviations. "Dr. Smith arrived at 5 p.m." reads as three sentences.
• Decimals. "It costs 3.50" contains a full stop that ends nothing.
• Ellipses. Three dots, one or three sentence endings depending on the implementation.
• Text with no punctuation at all — a list, a set of headings — reads as one enormous sentence.

Treat the sentence count as approximate. It is useful for comparing two drafts and not for reporting a figure to anyone.

Reading time is arithmetic on an assumption

The figure is word count divided by an assumed rate — here 200 words per minute, which is a common average for adult silent reading of general prose.

Real rates vary enormously. Technical material is read far slower. A skim-reader moves at several times that. Someone reading in a second language, or with dyslexia, or on a phone in a noisy place, moves slower again. The number describes an average reader who may not exist in your audience.

It is fine as a rough signal on an article — a useful hint that a piece is a five-minute read rather than a twenty-minute one. It is not a measurement, and treating a difference between four and five minutes as meaningful reads more into it than is there.

Where the counts genuinely matter

Character limits are the case where exactness counts, and they are unforgiving:

• Meta descriptions — roughly 155–160 characters before truncation, though search engines truncate by pixel width rather than character count, so a description full of wide letters is cut sooner.
• Title tags — around 60 characters, same caveat.
• Social posts — hard limits that reject rather than truncate.
• SMS — 160 characters, and 70 if the message contains any non-Latin character, because the encoding changes.
• Database fields — where exceeding the limit silently truncates and nobody notices until later.

Word counts as a target are a trap

Writing to hit a word count produces padding. The advice to "write 1,500 words for SEO" has no basis — length correlates with ranking because thorough articles tend to be longer, not because length causes ranking.

Use the count to check whether a piece is roughly the right size for its purpose, and to notice when a section has become disproportionate. Not as a goal.

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