ACT Composite Percentile Converter

Convert ACT composite scores (1–36) and section scores (English, Math, Reading, Science) to national percentile ranks. Based on ACT national norms for ~1.4 million annual test-takers.

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
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How It Works

Convert ACT composite scores (1–36) and section scores (English, Math, Reading, Science) to national percentile ranks. Based on ACT national norms for ~1.4 million annual test-takers

Each component has a specific meaning:

  • ACT national norms — The act national norms recorded for the scenario being assessed.

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

How to Use

Enter the ACT national norms for the scenario you are assessing. Convert ACT composite scores (1–36) and section scores (English, Math, Reading, Science) to national percentile ranks. Based on ACT national norms for ~1.4 million annual test-takers. Use the act percentile result to inform your calculation.

Frequently Asked Questions