IELTS and PTE both are high stake assessments of the English Language, using different layouts. For a general audience, here is the comparison between the scores of both tests. In IELTS students receive band scores of 1 to 9, whereas in PTE academic the test takers receive scores ranging from 1 to 90.
PTE Score Range--------------- IELTS Band Score
86 to 90 == 9 band
83 to 85 == 8.5 band
79 to 82 == 8.0 band
73 to 78 == 7.5 band
65 to 72 == 7.0 band
59 to 64 == 6.5 band
51 to 58 == 6.0 band
43 to 50 == 5.5 band
35 to 42 == 5.0 band
30 to 34 == 4.5 band