Reading time is an estimate of how long a typical reader may need to get through a piece of text. It is useful for planning content, comparing article lengths and giving visitors a rough expectation, but it should never be presented as a precise promise because people read at different speeds.
The basic reading-time formula
The simple calculation is:
For example, 1,200 words at an assumed reading speed of 200 words per minute gives an estimate of 6 minutes.
Why the estimate varies
Reading speed changes with subject knowledge, language, sentence complexity, formatting, device and reader attention. A technical article can take longer than a conversational article with the same word count because the reader may pause to understand unfamiliar terms.
Calculate reading time with Tervilo
- Open the Tervilo Reading Time Calculator.
- Paste the article or passage.
- Choose or review the reading-speed assumption.
- Run the calculation.
- Use the result as an estimate when labeling or planning the content.
Choosing a words-per-minute assumption
There is no universal speed that applies to every reader. A practical site can choose a reasonable editorial assumption and use it consistently. The important thing is to label the number as an estimate rather than implying that every visitor will finish in exactly that time.
Word count is the foundation
A reading-time estimate is only as consistent as the word count behind it. Hyphenated terms, numbers, URLs, code blocks and other unusual text can be tokenized differently by different systems. For ordinary prose, a word count is usually a useful practical basis. For unusual technical text, inspect the underlying count and interpret the estimate accordingly.
Should headings and lists count?
That depends on the method. A simple whole-text calculation may count all words in the supplied content, including headings and list items. A publishing system may calculate only visible article prose. The important point is consistency: use the same method when comparing content across a site.
Reading time is not a quality metric
A longer article is not automatically better, and a shorter article is not automatically weaker. The useful question is whether the content solves the reader's problem efficiently. Do not add unnecessary paragraphs just to increase an estimated reading time.
Quick checklist
- □ The word count is measured consistently.
- □ The reading-speed assumption is reasonable for the audience.
- □ Technical or unusual text is interpreted carefully.
- □ The result is presented as an estimate.
- □ Content length is driven by usefulness, not a target reading time.
Quick answer
Estimate reading time by dividing word count by a chosen words-per-minute speed. Treat the result as an estimate, keep the counting method consistent, and remember that reading time depends on the reader and the complexity of the material.