T-Score Grade Calculator
Calculate T-scores and convert them to letter grades (Mean=50, SD=10)
T-Score: A standardized score with Mean = 50 and Standard Deviation = 10. Formula: T = 10z + 50
T-Score Reference
T = 70: Top 2%T = 60: Top 16%T = 50: AverageT = 40: Bottom 16%