Grading is a skill found in Wii Sports Club that replaces the Skill mark. Unlike Skills, it is harder to upgrade and requires skill. There is up to Grade 10 in normal grades, and up to Grade Star 10 in Star Grades.
Grade to Skill Conversion Meter
Starters
Grade 1 = Skill 0-99
Grade 2 = Skill 100-199
Grade 3 = Skill 200-299
Grade 4 = Skill 300-399
Grade 5 = Skill 400-499
Grade 6 = Skill 500-599
Grade 7 = Skill 600-699
Grade 8 = Skill 700-799
Grade 9 = Skill 800-899
Grade 10 = Skill 900-999
Pro
Grade ★1 = Skill 1000-1099
Grade ★2 = Skill 1100-1199
Grade ★3 = Skill 1200-1299
Grade ★4 = Skill 1300-1399
Grade ★5 = Skill 1400-1499
Grade ★6 = Skill 1500-1599
Grade ★7 = Skill 1600-1699
Grade ★8 = Skill 1700-1799
Grade ★9 = Skill 1800-1899
Grade ★10 = Skill 1900-2000