Z-Score to T-Score Calculator
Convert standard scores to T-scores used in psychological and educational testing
Input Data
Conversion Formula
T = 50 + (Z × 10)
Where:
- T is the T-score
- Z is the Z-score
- 50 is the mean of the T-score distribution
- 10 is the standard deviation of the T-score distribution
Conversion Results
Z-Score
0.00
T-Score
50.00
Interpretation Guide
T-Score Ranges:
- 20-30: Very low
- 30-40: Low
- 40-60: Average
- 60-70: High
- 70-80: Very high
T-scores are commonly used in psychological testing, where a score of 50 represents the population mean, and each 10-point deviation represents one standard deviation.