Work out fluency level estimate instantly with clear inputs, formula shown and shareable results.
Proficiency depends on study hours, vocabulary breadth and productive practice, weighted here 40/35/25. Three hundred and fifty hours with 2500 words and forty hours of speaking gives a composite of 44 - the A2 to B1 boundary. Speaking practice is the component learners most often neglect, and it is what separates passive knowledge from fluency.
Composite score
score = 40% study hours + 35% vocabulary + 25% speaking practice, each capped at 100
CEFR bands
45 for B1, 65 for B2, 85 for C1
Because comprehension and production develop differently. Many learners read at B2 while speaking at A2 because they never practise output.
Roughly - 4000 to 5000 word families covers about 95% of everyday text, which is the usual threshold for comfortable comprehension.