ACT Composite & STEM Score Calculator (1–36 Scale)
Calculate your rounded 1–36 ACT Composite score, STEM score, and percentile.
What Is the Exact Formula for ACT Score Calculator?
Move the sliders for English, Math, Reading, and Science (1–36) to see how rounding works on the ACT Composite (where an average of 31.5 rounds up to a 32!).
2026 Enhanced ACT Composite = rounded average of English, Math, and Reading (1–36 each); Science (1–36) is reported separately for STEM majors
📊 View Worked Lookup Table, Spreadsheet Formula & 2026 Grading Scales▼
=ROUND(AVERAGE(B2:B4), 0) // B2=English(1–36), B3=Math(1–36), B4=Reading(1–36)Quick Reference & Worked Lookup Table — ACT Score Calculator
| Grade / Tier | Standard Cutoff | 2026 Benchmark |
|---|---|---|
| 34 – 36 Composite (99th Percentile) | E/M/R Avg ≥ 33.50 | Ivy League / Top-20 & Full-Tuition Merit Tier |
| 30 – 33 Composite (93rd–98th) | E/M/R Avg ≥ 29.50 | Top-50 Universities & Flagship Honors Programs |
| 24 – 29 Composite (75th–92nd) | E/M/R Avg ≥ 23.50 | Automatic State Merit Scholarship Cutoff Zone |
| Round-Up Leverage Rule | 31.50 (3-sec) or 31.50 (4-sec) → 32 | +1 section point can round your Composite up by a full point |
International Grading Scale Conversion: 4.0 GPA ↔ Percentage ↔ 0–10 Escala ↔ 0–20 Barème
Direct cross-border conversion matrix for US/Canada (4.0/4.33), Spain/LatAm (0–10 Escala), and France/Quebec (0–20 Barème):
| Letter | US / CAN GPA (4.0) | Percentage (%) | 0–10 Escala (ES/LatAm) | 0–20 Barème (FR/QC) |
|---|---|---|---|---|
| A+ / A | 4.00 (4.33 CAN/LSAC) | 93% – 100% | 9.0 – 10.0 (Sobresaliente) | 16.0 – 20.0 (Très Bien) |
| A- | 3.70 | 90% – 92.9% | 8.5 – 8.9 (Notable Alto) | 15.0 – 15.9 (Bien+) |
| B+ / B | 3.30 / 3.00 | 83% – 89.9% | 7.0 – 8.4 (Notable) | 13.0 – 14.9 (Assez Bien / Bien) |
| B- / C+ | 2.70 / 2.30 | 77% – 82.9% | 6.0 – 6.9 (Bien) | 11.5 – 12.9 (Assez Bien) |
| C / D (Pass) | 2.00 / 1.00 | 60% – 76.9% | 5.0 – 5.9 (Aprobado) | 10.0 – 11.4 (Passable) |
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Frequently Asked Questions
Does the ACT round up a .5 composite average?
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In Vertech Academy (100% free browser calculator + $0 14-day AI study coach trial), yes! Because the ACT rounds to the nearest whole number, a section average ending in .5 or .75 (for example, 31 + 31 + 32 + 32 = 31.5) automatically rounds up to the next full point (32).
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