How Reading Time Estimates Are Actually Calculated
Reading time is estimated by dividing total word count by an assumed average reading speed, commonly cited as roughly 200-250 words per minute for adult silent reading of straightforward text — a 1,000-word article at 200 words per minute gives an estimated reading time of 5 minutes.
This is the same underlying calculation covered in the word counter guide, worth walking through specifically for how it applies to reading time estimation.
The basic calculation
Word count ÷ assumed reading speed (words per minute) = estimated reading time in minutes. A 1,500-word article at an assumed 200 words per minute gives 1,500 ÷ 200 = 7.5 minutes, commonly rounded to a clean "8 min read" or similar displayed figure.
Where the 200-250 WPM figure comes from
This range is a commonly cited average for adult silent reading of general, moderately complex text, based on various reading speed studies — it represents a reasonable population average, not a precise figure for any specific individual reader, whose actual speed can vary meaningfully from this average in either direction.
Why the assumption matters for the final displayed figure
A tool using a faster assumed reading speed (say, 250 WPM) will display a shorter estimated reading time than one using a slower assumption (200 WPM) for the identical piece of text — this is a normal source of variation between different reading time tools or platforms, not an error in either one.