IQ Score Percentile Calculator

Convert IQ scores (mean 100, SD 15 for Wechsler/Stanford-Binet) to percentile ranks and interpret using standard classification bands. IQ = 100 + 15z; percentile from normal distribution CDF.

Data set — comma or newline separated
Statistical Results — n = 8
Count (n)8
Sum (Σx)40
Min2
Max9
Range7
Q14
Q35.5
IQR1.5
Mean (μ)5
Median4.5
Mode4
Pop. Variance (σ²)4
Pop. Std Dev (σ)2
Sample Variance (s²)4.571428571
Sample Std Dev (s)2.138089935
Skewness0.65625
Excess Kurtosis-0.21875
Advertisement

How It Works

Convert IQ scores (mean 100, SD 15 for Wechsler/Stanford-Binet) to percentile ranks and interpret using standard classification bands. IQ = 100 + 15z; percentile from normal distribution CDF

Each component has a specific meaning:

  • Standard classification bands — The standard classification bands recorded for the scenario being assessed.

Note: Interpret the iq percentile result against the thresholds and context described above.

How to Use

Enter the standard classification bands for the scenario you are assessing. Convert IQ scores (mean 100, SD 15 for Wechsler/Stanford-Binet) to percentile ranks and interpret using standard classification bands. IQ = 100 + 15z; percentile from normal distribution CDF. Use the iq percentile result to inform your calculation.

Frequently Asked Questions