MEASUREMENT · 5 min
How is reading speed measured—and why is WPM not enough?
The arithmetic is the easy part
Reading speed is usually calculated by dividing the number of words in a passage by elapsed minutes. Finishing 300 words in two minutes produces 150 words per minute. That number is useful, but it does not describe text difficulty, prior knowledge, language proficiency or what the reader understood.
A word is not an equal unit across languages. English often uses short separate words, German forms compounds and other languages package information differently. Comparisons are more meaningful when the same reader uses fresh texts of similar length and difficulty in the same language.
Put comprehension next to pace
Skimming a page quickly is not the same as explaining its argument. Questions about the main idea, explicit details and inferences sample different layers of comprehension. Three short questions cannot represent the whole skill, but they can reveal whether accuracy fell as pace rose.
Look at a median across several unseen passages rather than one personal record. Keeping the device, type size and environment reasonably stable also makes comparisons fairer. The useful target is not the largest number; it is a pace that fits the purpose while preserving meaning.
References
- Brysbaert, M. (2019). How many words do we read per minute? A review and meta-analysis of reading rate. DOI: 10.1016/j.jml.2019.104047
- Rayner, K. et al. (2016). So Much to Read, So Little Time: How Do We Read, and Can Speed Reading Help? DOI: 10.1177/1529100615623267