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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Formula Definitions

The ACT Composite Percentile Converter works by applying a well-defined formula to the values you enter. Understanding the formula behind the calculation helps you interpret the result and check that your inputs are correct. Below we break down the key components that drive the ACT Percentile.

This calculator evaluates the inputs you provide using a standard, well-established formula for its category. Enter your values, choose the relevant settings, and press Calculate to obtain an accurate, reproducible result that you can verify against reference values or published standards.

How to Use This Calculator

  1. Enter the required values. Enter the required values into the ACT Composite Percentile Converter input fields.
  2. Adjust settings. Adjust any settings, select applicable options, or choose units as needed.
  3. Calculate the result. Press Calculate to compute the result using the underlying formula.
  4. Interpret the output. Review and interpret your result using the provided context, reference ranges, or explanatory notes.

Frequently Asked Questions