How many English words do I know? A practical way to estimate vocabulary size
Learn what an English vocabulary estimate measures, why recognition and recall differ, and how to interpret your result.
Read guideEnglish vocabulary app for iPhone
Know how many English words you really know.
VocaNum measures your English vocabulary with short questions, finds words that need another look, and turns them into focused practice.
Download on theApp Store
No VocaNum account required. Core learning works offline.
How VocaNum works
Measure first. Practise what matters.
- 01
Answer short questions
Use definitions and sentences to check words in context.
- 02
Build a vocabulary score
Correct, missed, and uncertain answers update what VocaNum knows.
- 03
Review weak words
Practise known, developing, forgotten, or unmeasured words.
Clear progress
See what each session changed.
VocaNum separates words you know from words still developing or forgotten. After a session, you can see newly verified words, recovered words, answer accuracy, and confidence changes.
- Measure
- Definitions and sentence questions
- Review
- Confidence-based word practice
- Control
- Local export and deletion tools
Vocabulary guides
Understand what your vocabulary score means.
How to improve your English vocabulary without random word lists
Use a repeatable vocabulary practice loop: measure, retrieve, check context, review weak words, and track useful progress.
Read guideRecognizing a word is not the same as recalling it
Understand receptive and productive vocabulary, test each kind of word knowledge, and move familiar words toward active use.
Read guide
Start with a measurement