| Grade | Scale | Scale 2 | US Grade |
|---|---|---|---|
| AA | 4,000 | 84,000 - 100,000 | A |
| AB | 3,700 | 77,000 - 83,990 | A- |
| BA | 3,300 | 71,000 - 76,990 | B+ |
| BB | 3,000 | 66,000 - 70,990 | B |
| BC | 2,700 | 61,000 - 65,990 | B- |
| CB | 2,300 | 56,000 - 60,990 | C+ |
| CC | 2,000 | 50,000 - 55,990 | C |
| CD | 1,700 | 46,000 - 49,990 | C- |
| DC | 1,300 | 40,000 - 45,990 | D+ |
| DD | 1,000 | 33,000 - 39,990 | D |
| FF | 0,000 | 0,000 - 32,000 | F |