🎓 GPA Calculator
Pick a letter grade and credits for each course to get your semester or cumulative GPA — 4.0, 4.3 or 4.5 scale, with Honors/AP weighting.
How to use the GPA calculator
Choose your grading scale — the standard US 4.0 scale, a 4.3 scale (where A+ earns 4.3), or the 4.5 scale used by most Korean universities — then enter the credits and letter grade for each course. Your GPA and total credits update instantly. Course names are optional. Use + Add course for more rows and × to remove one. Enter one term to get a semester GPA, or every course you have taken to get your cumulative GPA.
Set a course's Type to Honors or AP/IB to also see a weighted GPA. Already know your GPA? Type it into Convert a GPA to see it as a percentage and on the other scales without entering courses.
How GPA is calculated
GPA = Σ (credits × grade points) ÷ total graded credits
Each grade is worth a number of grade points; multiplying by the course's credit hours gives quality points. GPA is the credit-weighted average, so a 4-credit class moves your GPA more than a 1-credit lab. Here is the default example on the 4.0 scale:
| Course | Credits | Grade | Quality points |
|---|---|---|---|
| English Composition | 3 | A (4.0) | 12.0 |
| Calculus I | 4 | B+ (3.3) | 13.2 |
| Intro to Psychology | 3 | A- (3.7) | 11.1 |
| Chemistry Lab | 1 | B (3.0) | 3.0 |
| Physical Education | 1 | P | not in GPA |
| Total | 11 (+1 pass) | 39.3 |
39.3 ÷ 11 = 3.5727… → 3.57. Credits earned are 12 because the pass course counts toward credits. A plain average of the four grades ((4.0 + 3.3 + 3.7 + 3.0) ÷ 4 = 3.50) would be wrong because it ignores credit hours.
Letter grade to GPA conversion chart
| Letter | Typical percent | 4.0 scale | 4.3 scale | 4.5 scale (Korea) |
|---|---|---|---|---|
| A+ | 97–100 | 4.0 | 4.3 | 4.5 |
| A | 93–96 | 4.0 | 4.0 | 4.0 (A0) |
| A- | 90–92 | 3.7 | 3.7 | — |
| B+ | 87–89 | 3.3 | 3.3 | 3.5 |
| B | 83–86 | 3.0 | 3.0 | 3.0 (B0) |
| B- | 80–82 | 2.7 | 2.7 | — |
| C+ / C / C- | 77–79 / 73–76 / 70–72 | 2.3 / 2.0 / 1.7 | 2.3 / 2.0 / 1.7 | 2.5 / 2.0 / — |
| D+ / D / D- | 67–69 / 63–66 / 60–62 | 1.3 / 1.0 / 0.7 | 1.3 / 1.0 / 0.7 | 1.5 / 1.0 / — |
| F | below 60 | 0 | 0 | 0 |
Percent cutoffs vary by school and instructor; the column above is the most common US pattern. On the 4.0 scale an A+ usually counts the same as an A, though a few schools award 4.3. On the Korean 4.5 scale there are only + and 0 (plain) steps, so if you switch scales an A- becomes A and a B- becomes B — double-check those grades.
Weighted vs. unweighted GPA
Most US high schools report an unweighted GPA on the 4.0 scale and a weighted GPA that rewards harder classes. A common scheme adds +0.5 for Honors and +1.0 for AP, IB or dual-enrollment courses, so an A in AP Biology counts as 5.0. Failing grades get no bonus. Policies differ — some schools add bonuses only to certain grades or cap the weighted GPA — so check your school profile. Colleges often recalculate GPA their own way, so report what your transcript shows.
Pass/fail, F grades and repeats
- P (pass) — counts toward credits earned but is left out of the GPA.
- NP (no pass) — no credit and no effect on GPA.
- F in a graded course — no credit earned, but the credits count as 0 points in the GPA, which drags it down hard. Grade replacement or averaging rules for repeated courses vary by school, so enter only the grade your school keeps.
Converting GPA to a percentage or another scale
Applications sometimes ask for a GPA on a different scale or as a percentage. This calculator shows the simple linear (proportional) conversion:
percent = GPA ÷ scale maximum × 100— 3.6 on a 4.0 scale → 90%other scale = GPA × (new maximum ÷ old maximum)— 3.6 / 4.5 → 3.6 × 4.0 ÷ 4.5 = 3.20 / 4.0
| 4.0 scale GPA | 4.3 scale (proportional) | 4.5 scale (proportional) | Percent (linear) |
|---|---|---|---|
| 4.0 | 4.30 | 4.50 | 100.0% |
| 3.8 | 4.08 | 4.27 | 95.0% |
| 3.5 | 3.76 | 3.94 | 87.5% |
| 3.3 | 3.55 | 3.71 | 82.5% |
| 3.0 | 3.22 | 3.38 | 75.0% |
| 2.7 | 2.90 | 3.04 | 67.5% |
| 2.5 | 2.69 | 2.81 | 62.5% |
| 2.0 | 2.15 | 2.25 | 50.0% |
Official conversions differ. A linear percentage is not the same as the percent grades on your report card, and services such as WES convert foreign grades course by course using their own tables. If an application specifies a conversion method, use that; otherwise report your GPA on its original scale and name the scale (for example "3.72 / 4.5").
Rounding or truncating?
Most schools round GPA to two decimals, but some truncate. The big number shows the rounded value, and the results list the truncated value when it differs.
This GPA calculator uses common grade-point tables for general information. Grade points, pass/fail and repeat policies, weighting and conversion rules vary by school — your official transcript is the final word. Your grades never leave your browser.