How Long does it takes to be fluent in French ?

Level	Numbers of hours
A1	80 - 100
A2	180 - 200
B1	350 - 400
B2	600-650
C1	850-900
C2	1000 +

Depending of the definition of fluent, the total hours can be different. According to the Common European Framework of reference (CEFR), the proficiency in the learning process is divided on a six-level-scale. 
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The CEFR Levels

Source : Council of Europe