How is the ACT composite score calculated?

The composite is the simple arithmetic mean of your four section scores: English, Math, Reading, and Science. The average is then rounded to the nearest whole number, with .5 rounding up.

Does the ACT Writing test count toward the composite?

No. The optional ACT Writing (essay) test is scored separately on a 2 to 12 scale and is never included in the 1 to 36 composite. The composite uses only the four multiple-choice sections.

How does rounding work on the ACT composite?

ACT rounds the average of the four sections to the nearest whole number. An average ending in .5 or higher rounds up, and below .5 rounds down. So 24.5 becomes 25 but 24.49 becomes 24.

What is a good ACT composite score?

The national average composite is around 19 to 21. A score of 24 or higher is above average, 30+ is competitive for selective universities, and 34 to 36 places you near the top of all test-takers.

Can my composite be higher than all my section scores?

No. Because the composite is an average, it always falls between your lowest and highest section scores. Rounding can only nudge it up or down by less than one full point.

ACT Composite Score Calculator

Email me this result

Get this tool's output sent to your inbox, plus one useful tool a week. No spam, unsubscribe any time.

What this calculator does

The ACT Composite Score Calculator turns your four ACT section scores into the single 1-to-36 number that colleges see first. Enter your English, Math, Reading, and Science scores and the tool applies the exact formula the ACT uses: average the four, then round to the nearest whole number.

How it works

The composite is a plain arithmetic mean. Add the four section scores together, divide by four, and round the result:

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

Rounding follows the standard half-up rule. An average of 24.5 rounds to 25, while 24.49 rounds to 24. Because every section is on the same 1-to-36 scale, the composite always sits between your weakest and strongest section. The optional Writing test is scored separately and never enters this calculation.

Tips and example

Suppose you scored English 28, Math 25, Reading 31, and Science 26. The sum is 110, divided by four is 27.5, which rounds up to a composite of 28. Notice how a single half point at the rounding boundary can lift your composite a full point — which is why pushing one weaker section up by a couple of raw points sometimes raises your composite more than expected. Use the breakdown below the result to see exactly how close you are to the next rounding threshold.