Conversion Tool
Norm score conversions · true-score intervals · fully offline
Theme
Dark
Slate
RSM
Ivory
History
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Curve
density
cumulat.
Axis scale
z
T
IQ
Stand.-S.
Wechsler
−4 SD
mean
+4 SD
z-Score
M 0 · SD 1
T-Score
M 50 · SD 10
IQ-Score
M 100 · SD 15
Standard Score
M 100 · SD 10
Wechsler Subscale
M 10 · SD 3
true: 10.00
Percentile
rank, 0–100
true: 50.00
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Interpretation
Average
Scores at or above 50% of the reference population
Confidence interval around the estimated true score
Reliability (r
tt
)
Confidence level
95%
90%
80%
68%
Scale
Lower
Estimated true score
Upper