There is no any official conversion or comparison between IELTS and TOEFL iBT scores. However, different universities and institutions use their own methods to compare these scores. Most universities compare IELTS 6.0 band score with TOEFL iBT 80 score. Below I’ll give you some IELTS scores and their widely accepted corresponding TOEFL iBT score values:

IELTS – TOEFL iBT
4.0 – 53
4.5 – 60
5.0 – 67
5.5 – 73
6.0 – 80
6.5 – 87
7.0 – 93
7.5 – 100
8.0 – 107
8.5 – 113
9.0 – 120

This is the conversion chart used by most of the institutions to evaluate your score during admission. But, it isn’t a official conversion chart. It is simply calculated by converting IELTS score into percentage and same percentage into TOEFL score.