Vocabulary test

Estimate how many English words you know with a short adaptive test.

  • Stop when you want
  • Keep answering to refine
  • 50,000-word estimate

  1. Step 1

    See a word

    The first few words jump in large steps from around rank 3,000 so the test can find your range quickly.

  2. Step 2

    Pick the definition

    Choose the matching meaning from four short options. Later words sit near your boundary, where you are about equally likely to get them right or wrong.

  3. Step 3

    Get a size estimate

    Your size is the sum, over all 50,000 words, of the chance you know each one. Keep going to refine it.