Take this three steps test in order to find out how many you know.
Most native English adult speakers who have taken the test fall in the range 20,000–35,000 words.
And for foreign learners of English, we’ve found that the most common vocabulary size is from 2,500–9,000 words.
Works for everyone, from small children (with parental help) to college professors!
Check the box for each word you know at least one definition for.
On Windows computers, you can navigate and select checkboxes with your keyboard using tab and space.