On testlanguages.com –
- Mark each word on the first page – if you know it very well
(If you aren’t sure about the word, don’t mark it.)
- Mark each word on the second page – if you know it very well
At the end, they will tell you about how many English words you know.
This is mostly just for fun, but if you study some vocabulary, and then take the test again a few months later, your score should increase a little.
There’s another website to test your English vocabulary called TestYourVocab