Reading level vs. reading speed
These two get confused constantly, but they measure different things. Reading level describes how hard a text is — the grade of schooling it takes to read it comfortably. Reading speed describes how fast a person reads, in words per minute (wpm). One is a property of the writing; the other is a property of the reader. You can read a low-level text slowly, or a high-level text quickly — they are not the same axis.
What "reading level" means
Reading level is usually a readability score calculated from the text itself — mostly from sentence length and word complexity (syllables per word). The best-known are the Flesch–Kincaid formulas: Flesch–Kincaid Grade Level maps a passage to a U.S. school grade, and Flesch Reading Ease gives a 0–100 score where higher is easier. Shorter sentences and plainer words raise ease and lower the grade level.
| Flesch Reading Ease | ≈ Grade level | Who it suits |
|---|---|---|
| 90–100 | 5th grade | Very easy — broad public |
| 60–70 | 8th–9th grade | Plain English — a good target for web |
| 50–60 | 10th–12th grade | Fairly demanding |
| 30–50 | College | Difficult — specialist readers |
| 0–30 | Graduate | Very hard — academic/technical |
Most general-audience writing aims for roughly an 8th-grade level: easy enough to skim, precise enough to trust.
What "reading speed" means
Reading speed is simply how many words you get through per minute. A typical adult reads general non-fiction at about 238 words per minute, though it ranges widely with skill, age and purpose. Speed says nothing about how hard the text is — it is about the reader and the moment. For how this changes across ages, see average reading speed by age.
How the two interact
They are independent measures, but they push on each other. A higher reading level — long sentences, dense vocabulary, unfamiliar concepts — slows your reading speed, because you pause more to process. That is why the same person breezes through a news article at 300 wpm but crawls through a legal contract at 150. Raising your speed on genuinely difficult material almost always costs comprehension, which is the whole point of reading. Match the effort to the text.
Using both in practice
If you write: aim your reading level at your audience (plainer for a broad public, denser only when the readers are specialists), and keep sentences short to lift readability. Track length as you draft with the word counter.
If you are estimating time: reading level tells you which speed to assume. Use a slower speed for hard text and a faster one for easy text, then get the minutes from the reading time calculator. And if your goal is to read faster without losing the thread, the evidence-based methods are in how to read faster.