GPA Calculator

GPA calculator: cumulative average and target grade

This calculator computes grade point average (GPA) from credit-weighted letter grades on a 4.33 or 5.0 scale, with a semester breakdown chart and a target panel for remaining credits. It does not apply grade replacement or school-specific rounding.

What this calculator does

The widget computes grade point average (GPA) from course credits and letter grades grouped by semester in Courses. Toggle between a 4.33 extended scale and a 5.0 weighted mapping for advanced placement (AP), International Baccalaureate (IB), or honors courses. The dashboard shows cumulative GPA, a per-semester bar chart, and the average needed in remaining credits to hit a target. It does not apply grade replacement, pass/fail rules, or institutional rounding.

Formula:

$\text{GPA} = \frac{\sum (\text{grade value} \times \text{credits})}{\sum \text{credits}}$
Target average:

$x = \frac{d \cdot (C_{\text{earned}} + C_{\text{remain}}) - g \cdot C_{\text{earned}}}{C_{\text{remain}}}$
g = current cumulative GPA, d = desired GPA, C = credits.

How the math works

Start with the default row in Semester 1: grade B (3.0 points on the 4.33 scale) in 3 credits. The widget multiplies 3.0 × 3 to get 9 grade points, then divides by 3 credits to show Current GPA 3.00 in the dashboard.

Add a second course—B in 4 credits and A in 3 credits—and cumulative GPA becomes (3×4 + 4×3) ÷ 7 ≈ 3.43. Each semester’s bar in the chart uses the same credit-weighted formula scoped to that term only.

In Target calculator, defaults are desired GPA 3.5 and 30 credits remaining. With 3.00 on 3 earned credits, the required average is (3.5 × 33 − 3.0 × 3) ÷ 30 ≈ 3.55. If the solve exceeds the active scale cap (4.33 or 5.0), the widget shows the raw number in red with Target not reachable with current remaining credits instead of treating it as achievable.

Limits of the model

Schools differ on plus/minus cutoffs, pass/fail exclusion, grade forgiveness, and whether advanced placement (AP) or International Baccalaureate (IB) courses use a weighted scale on the transcript. Enter only grades that count on your record. This page does not compute course-level percentages, final-exam targets, or credit-hour planning across degree requirements—those need separate tools or your advisor.

GPA Calculator FAQ

How is GPA calculated in this widget?

In Courses, each letter grade maps to a point value on the active scale. The widget multiplies each value by credits, sums grade points, and divides by total credits:

\text{GPA} = \frac{\sum (\text{grade value} \times \text{credits})}{\sum \text{credits}}

What is the difference between the 4.33 and 5.0 scales here?

The scale toggle in Courses switches mappings. 4.0 (4.33 extended) uses A+ = 4.33, A = 4.0, with plus/minus steps down to F = 0. 5.0 (AP/IB) bumps values for honors, advanced placement (AP), or International Baccalaureate (IB) courses (A+ = 5.0, A = 4.5, and so on). The dashboard labels which scale is active under Current GPA.

Do credits affect GPA?

Yes. Credits are the weight in every row. A B in a 4-credit lab moves cumulative GPA more than an A in a 1-credit elective because grade points = point value × credits before the widget sums and divides.

What happens when I retake a class?

Policies vary. Many schools replace the old grade; others average attempts or cap replacements. This widget does not model retakes; enter the grades that count on your transcript per your registrar.

How does the target calculator work?

In the dashboard Target calculator, enter desired GPA and credits remaining. The widget solves for the average GPA needed across those credits: (desired × (earned + remaining) − current × earned) ÷ remaining. If the result exceeds the active scale maximum (4.33 or 5.0), the card shows Target not reachable with current remaining credits.

What is the difference between cumulative and semester GPA?

Current GPA in the dashboard is cumulative across all semesters you entered. The Semester breakdown bar chart shows each term separately.

How do I add a second course or semester?

Use + Add course inside a semester block or + Add semester at the top of Courses. Each new row updates Current GPA and the semester chart immediately.

Why does the widget warn about GPAs above 4.0 on the 4.33 scale?

On the 4.0 (4.33 extended) toggle, A+ tops out at 4.33. If you enter a desired GPA above 4.0 while on that scale, an amber note suggests switching to 5.0 (AP/IB) for weighted targets. The required-average solve also caps at the active scale maximum.

Courses

GPA in context

How to use this calculator

Reading your GPA dashboard

Worked scenarios

Example: default single course (3.00 GPA)

Example: two courses in one semester (3.43 GPA)

Reading the Target calculator panel

When earned credits dilute future terms