Answer:
There are a number of different conversion scales. However, the best one I've come across is as follows:
GPA Percentile Letter Grade
4.0 --- 95 + up -- A
3.9 --- 94 -------- A
3.8 --- 93 -------- A
3.7 --- 92 -------- A
3.6 --- 91 -------- A
3.5 --- 90 -------- A
3.4 --- 89 -------- B
3.3 --- 88 -------- B
3.2 --- 87 -------- B
3.1 --- 86 -------- B
3.0 --- 85 -------- B
2.9 --- 84 -------- B
2.8 --- 83 -------- B
2.7 --- 82 -------- B
2.6 --- 81 -------- B
2.5 --- 80 -------- B
2.4 --- 79 -------- C
2.3 --- 78 -------- C
2.2 --- 77 -------- C
2.1 --- 76 -------- C
2.0 --- 75 -------- C
1.9 --- 74 -------- C
1.8 --- 73 -------- C
1.7 --- 72 -------- C
1.6 --- 71 -------- C
1.5 --- 70 -------- C
1.4 --- 69 -------- D
There is a much easier scale on the related links we've added, along with an advanced GPA calculator. Just remember, not all schools are the same when it comes to percentages.