Levels
Beginners (IELTS score: 1-2) Common European Framework (CEF) A1
Elementary (IELTS score:3/TOEFL IBT Score: 32-42) Common European Framework A1/2
Pre-Intermediate (IELTS score:3.5/TOEFL IBT Score: 43-51) Common European Framework A2/B1
Intermediate (IELTS score:4.5/TOEFL IBT Score: 51-61) Common European Framework B1
Upper Intermediate (IELTS score:5-6/TOEFL IBT Score: 62-91) Common European Framework B2
Advanced (IELTS score:6.5-7/TOEFL IBT Score: 92-112) Common European Framework C1
Proficiency (IELTS score:7.5-9/TOEFL IBT Score: 113-120) Common European Framework C2
To find your reading and writing levels try the British Council assessment here