This calculator counts the words in your text and divides by reading speed in words per minute. Average is 238 wpm — the figure most commonly cited in reading research for silent adult reading. Slow (150 wpm) suits dense technical material or non-native readers; fast (350 wpm) is closer to a practised skimmer. The result is a guide, not a stopwatch: reading speed varies with the complexity and familiarity of the subject.