How to use the ACT Score Calculator
- Enter the number of correct answers in English, Maths, Reading and Science.
- The tool maps each raw score to the 1–36 scaled score.
- Read the composite, which is the average of the four rounded to the nearest whole number.
- Test small improvements per section to see which lifts the composite.
How the calculation works
Each section has a fixed question count — 75 English, 60 Maths, 40 Reading, 40 Science — and there is no penalty for wrong answers, so every question should be answered. Raw scores are converted to scaled 1–36 scores through a conversion table that differs slightly between test forms to equate difficulty, so a scaled 30 means the same ability regardless of which form you sat.
The composite is the arithmetic mean of the four scaled scores, rounded half up. That rounding is worth planning around: scaled scores of 30, 31, 30, 31 average 30.5 and round to 31, while 30, 30, 30, 31 average 30.25 and round to 30. Because the scale compresses at the top, one extra correct answer near the ceiling can be worth a full scaled point, whereas in the middle of the range it often changes nothing. Superscoring, accepted by many universities, takes the best section scores across sittings, which rewards focused retakes on your weakest section.
Composite = round((English + Maths + Reading + Science) / 4)Source: ACT, Inc. scoring guidelines: section scaling 1–36 and composite rounding.
Worked example
Scaled scores of 29 English, 27 Maths, 32 Reading and 30 Science.
- Sum = 29 + 27 + 32 + 30 = 118.
- Average = 118 / 4 = 29.5.
- Rounded half up = 30.
- Raising Maths by two points would give 30.0 average, still 30.
A composite of 30, where the next meaningful jump needs three more scaled points overall.
Frequently asked questions
Is there a penalty for guessing on the ACT?+
No. Wrong answers score zero, so leave nothing blank.
How is the composite rounded?+
The four-section average is rounded to the nearest whole number, with .5 rounding up.
What is superscoring?+
Combining your best section scores across multiple test dates into a single composite, accepted by many universities.
Does the writing test affect the composite?+
No. Writing is reported separately on a 2–12 scale.
Last reviewed August 31, 2026. We review this page whenever the underlying formula, tax year, published rate or standard changes.