ACT Score Calculator Formula

Understand the math behind the act score calculator. Each variable explained with a worked example.

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Formulas Used

ACT Composite Score

composite = round(sum_scores / 4)

Exact Average

exact_avg = sum_scores / 4

Sum of Sections

highest_section = sum_scores

Variables

VariableDescriptionDefault
englishEnglish Score28
math_scoreMath Score26
readingReading Score29
scienceScience Score27
sum_scoresDerived value= english + math_score + reading + sciencecalculated

How It Works

How to Calculate ACT Composite Score

The ACT composite is the rounded average of your four section scores.

Formula

Composite = round((English + Math + Reading + Science) / 4)

Each section is scored 1–36, and the composite is also 1–36.

Worked Example

A student scores English 28, Math 26, Reading 29, Science 27.

english = 28math_score = 26reading = 29science = 27
  1. 01Sum of sections: 28 + 26 + 29 + 27 = 110
  2. 02Average: 110 / 4 = 27.5
  3. 03Composite (rounded): 28

Frequently Asked Questions

What is a good ACT score?

A composite of 24+ is above average. Scores of 30+ are competitive for selective colleges, and 34+ is exceptional.

How does ACT scoring differ from SAT?

The ACT uses 1–36 per section with a composite average. The SAT uses 200–800 per section with a sum total.

Does the ACT writing score affect the composite?

No, the optional writing section is scored separately (2–12) and does not factor into the composite.

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