Calculate current or legacy ACT composite scores, percentile context, and STEM score from section results. Use it to test different inputs quickly, compare outcomes, and understand the main factors behind the result before moving on to related tools or deeper guidance.
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Choose the ACT score model
ACT changed the composite calculation for tests from September 2025 onward. Current ACT composite scores use English, Math, and Reading. Legacy score reports average all four core sections.
Current ACT scoring
30
Composite score from the rounded average of English, Math, and Reading. Science remains reportable but does not change the current ACT composite.
Science is separate in current ACT scoring ACT's current composite uses English, Math, and Reading only. If you take Science, it is still reportable and contributes to a STEM score, but not to the main composite.
National rank estimate
88th percentile
Unrounded average
30
STEM score
29
Science used in composite
No
Section scores
Section
Score
Role in composite
English
30
Included
Math
28
Included
Reading
32
Included
Science
29
Reportable only
How to use this result
Compare the composite with the range your target schools usually report, then review the section scores separately. A strong composite can still hide a weaker Math or Reading section that matters for course placement, scholarship thresholds, or a future superscore.
ACT score guide: current composite scoring, legacy four-section averages
An ACT score calculator helps you translate section scores into the composite colleges and students usually compare first. The important catch is that ACT changed the composite method for tests from September 2025 onward, so a useful ACT score calculator now needs to distinguish between the current three-section composite and older legacy four-section score reports.
What changed in ACT composite scoring
For current ACT testing, the composite score is calculated from English, Math, and Reading. Science is now optional and remains a separately reportable score that can still contribute to a STEM-style interpretation, but it no longer changes the main composite score for current ACT administrations. That is why an ACT score calculator built only around the old four-section formula is no longer fully accurate for new score reports.
Older ACT score reports used the legacy model, which averaged English, Math, Reading, and Science to produce the composite. Many students, counsellors, and parents still need that older method when they are reviewing past score reports or combining historical results with newer policy explanations. The calculator supports both modes so you can match the formula to the score report you actually have.
Because the scale remains 1 to 36, students often focus on the headline composite first, but the section pattern still matters. Colleges, scholarships, honours programs, and course placement decisions may care about Math or Reading strength even when the overall ACT composite looks competitive.
How the current and legacy ACT composite formulas work
In current ACT scoring, the composite is the rounded average of English, Math, and Reading. Science is still reportable, and ACT notes that it can be used for a STEM score together with Math, but it does not enter the main composite calculation for current score reports. In legacy scoring, the composite is the rounded average of English, Math, Reading, and Science.
This calculator also shows the unrounded average so you can see exactly how the rounding moved the final composite. That matters because a student can sit just below or above a published admissions or scholarship threshold before rounding. Seeing the raw average makes the scoring step more transparent than a simple final number alone.
Current ACT composite = round((English + Math + Reading) / 3)
Use this formula for current ACT composite scoring from September 2025 onward.
Use this formula for older ACT score reports that included Science in the composite.
STEM score = round((Math + Science) / 2)
A simple STEM view that keeps Science visible even when it no longer changes the current composite.
Worked example: 30 English, 28 Math, 32 Reading, and 29 Science
With section scores of 30 in English, 28 in Math, 32 in Reading, and 29 in Science, the current ACT composite is based on English, Math, and Reading only. The unrounded average is 30.00, so the current composite is 30. Under the legacy four-section method, the unrounded average would be 29.75, which still rounds to 30. In this example the final composite happens to match in both modes, but that will not always be true.
The example also shows why the section table matters. Even if the main ACT composite lands at the same rounded number, the route to that score differs depending on the scoring era. Students reviewing a current score report should not assume Science still pulls the composite up or down the way it did on older ACT administrations.
The percentile line helps give context, but it should be used as context rather than as an admissions guarantee. A national rank estimate can help you understand whether the score is broadly competitive, while the section scores help you decide what to study next or whether a superscore strategy could change the picture on a later test date.
This page does not predict admission decisions, scholarship offers, or superscore outcomes by college. Colleges set their own score expectations, and some institutions are test-optional, test-free, or emphasise section-level strengths differently. The calculator also does not include the ACT Writing test, because writing is reported separately rather than folded into the main composite.
Percentile context is useful, but a percentile label is still only one lens on a score. The better next step is usually to compare the composite and individual sections with the middle ranges published by the schools you care about, then decide whether retesting, superscoring, or strengthening another part of the application is the more valuable move.
Does Science still count toward the ACT composite score?
For current ACT score reports, no. ACT's newer composite score uses English, Math, and Reading. Science is still reportable and can still matter for STEM interpretation, but it does not change the current composite. For older legacy score reports, Science was part of the four-section composite, so the calculator includes a legacy mode for that older formula.
How does ACT round the composite score?
The ACT composite is based on an average and then rounded to the nearest whole-number score on the 1 to 36 scale. That is why the unrounded average is useful. A student can sit just below or above a threshold before rounding, and seeing the raw average explains exactly how the final composite was produced.
What is an ACT superscore?
A superscore is an ACT composite built from your best section scores across multiple test dates rather than from just one test administration. ACT's official superscore method now follows the newer current-composite approach for current testing, which means English, Math, and Reading drive the main superscore composite, while Science remains separately reportable and can still support STEM interpretation.
What counts as a good ACT score?
There is no universal cutoff that makes an ACT score good for every purpose. A strong score depends on the colleges, scholarships, honours programs, and course-placement contexts you care about. The best use of the calculator is to understand your composite and section pattern first, then compare those numbers with the published score ranges at your target schools rather than relying on a generic label alone.
