How many words do you actually know?

Ten minutes. One honest number.

The baseline test

Around a hundred words. Yes or no: do you know it?

A few of them are fakes — plausible-sounding non-words that keep the estimate honest if you're generous with yourself. Ten minutes later you get a real answer: an estimated vocabulary size, and a map of your frontier — the words just past your known zone, which is exactly where study pays off.

No signup needed. Take the test first; decide later whether any of it is worth keeping. Your answers stay in your browser.
Why the fake words?
Self-rated vocabulary tests flatter everyone. Ours borrows the honesty check from the research versions: say yes to a word that doesn't exist, and the estimate adjusts. The number you get is one you can defend.
What you get
An estimated vocabulary size, your knowledge mapped across 12,000 graded words, and a study frontier — the words just beyond what you know, where ten minutes a day actually moves the number. No one drills you on "the."
Begin

A number you'll want to beat.

Then point it at real books: every title in our library shows exactly which words stand between you and the story.

Take the baseline test   Have a Kindle? Start there instead