CEFR to IELTS, TOEFL, PTE & Duolingo Convertor

International English Language Testing System (IELTS) score ranges from 0 to 9.
Common European Framework of Reference for Languages (CEFR) score ranges from A1 to C2.
Pearson Test of English (PTE) score ranges from 0 to 90.
Duolingo English test score range from 10 to 160.

The above calculations are based on a research report published on the ETS, Pearson(PTE), IELTS and Duolingo websites.