Reference
The GPA scale, explained
Letter grade to percentage to GPA on the standard 4.0 scale — plus how weighted and unweighted GPAs differ.
| Letter | Percentage | GPA |
|---|---|---|
| A+ | 97–100% | 4.0 |
| A | 93–96% | 4.0 |
| A- | 90–92% | 3.7 |
| B+ | 87–89% | 3.3 |
| B | 83–86% | 3.0 |
| B- | 80–82% | 2.7 |
| C+ | 77–79% | 2.3 |
| C | 73–76% | 2.0 |
| C- | 70–72% | 1.7 |
| D+ | 67–69% | 1.3 |
| D | 63–66% | 1.0 |
| D- | 60–62% | 0.7 |
| F | Below 60% | 0.0 |
Percentage cutoffs vary by school — this is the common 10-point scale. Always follow your school’s official chart.
Weighted vs. unweighted
An unweighted GPA caps every A at 4.0, no matter how hard the class is. A weighted GPA adds grade points for tougher courses — usually +0.5 for Honors and +1.0 for AP or IB — so it can rise above 4.0.
| Course type | A | B |
|---|---|---|
| Regular | 4.0 | 3.0 |
| Honors (+0.5) | 4.5 | 3.5 |
| AP / IB (+1.0) | 5.0 | 4.0 |
GPA scale questions
What is the 4.0 GPA scale?
The 4.0 scale converts letter grades to grade points: A = 4.0, B = 3.0, C = 2.0, D = 1.0, and F = 0.0, with pluses and minuses in between (an A− is 3.7, a B+ is 3.3, and so on). Your GPA is the credit-weighted average of those points across your courses.
Do the percentage ranges vary by school?
Yes. The letter-to-GPA points are standard, but the percentage cutoffs for each letter are set by your district or college — some schools use a 10-point scale (A = 90–100) and others use a 7-point scale (A = 93–100). Always follow your school’s official chart; the ranges here are the most common 10-point version.
How does a weighted GPA scale work?
A weighted scale rewards harder courses by adding grade points before averaging — most commonly +0.5 for Honors and +1.0 for AP or IB. That’s why a weighted GPA can go above 4.0: an A in an AP class can count as 5.0. An unweighted scale caps every A at 4.0 regardless of course difficulty.
How do I turn my grades into a GPA?
Use the chart to convert each grade to its GPA points, multiply by the course’s credits, add them up, and divide by total credits — or let Gradejar do it for you on the College GPA or High School GPA calculator, which also remember your courses.