GPA Calculator
Enter each course once, then compare its weighted GPA on 4.5, 4.3, and 4.0 scales side by side—without sending grades anywhere.
- Fewer clicks, keyboard friendly
Enter courses once to compare their credit-weighted GPA on three common scales.
Saved in this browserCourses
P grades count as completed credits but are excluded from GPA.
| Course | Credits | Grade | Remove course |
|---|---|---|---|
Your GPA
GPA = total of (grade point × credits) ÷ GPA credits
Grade tables differ by school. Confirm your registrar’s table before using a result for an application or official record.
Courses and grades stay in this browser; nothing is sent to a server.
How to use
- Enter the credit value and letter grade for each course.
- Use Add course for every additional class; a course name is optional.
- Choose P for a pass/fail course when it should not affect your GPA.
- Compare the credit-weighted 4.5, 4.3, and 4.0 results as they update.
- Confirm your school’s grade table before using the result on an official application.
The credit-weighted GPA formula
A GPA is not an ordinary average of course grades. Multiply every grade point by that course’s credits, add those quality points, then divide by the credits that count toward GPA: GPA = Σ(grade point × credits) ÷ Σ(GPA credits). For example, on a 4.5 scale, a 3-credit A+ and a 2-credit B+ produce (3 × 4.5 + 2 × 3.5) ÷ 5 = 4.10. A 4-credit course therefore affects the result twice as much as a 2-credit course.
Why 4.5, 4.3, and 4.0 are not one universal conversion
Schools set their own grade tables. A common Korean 4.5 table maps A+ to 4.5, A0 to 4.0, and B+ to 3.5; a common 4.3 table maps those grades to 4.3, 4.0, and 3.3. On the common 4.0 table used here, A+ and A0 are both 4.0. This calculator recalculates every entered course against each table instead of simply multiplying a final GPA by a maximum-scale ratio. An institution can use a different table, so its registrar’s published rule always takes priority.
Pass/fail and repeated courses
This calculator treats P as completed credit that does not enter the GPA denominator or quality-point total, a common convention. F is different: it contributes 0 grade points and its credits remain in the GPA denominator. Schools vary on whether a repeated course replaces the original grade, keeps both attempts, or applies another rule. Enter only the attempts that your own school says belong in the official calculation.
Frequently asked questions
How do I calculate my GPA?
Calculate GPA by adding every course’s grade point multiplied by its credits, then dividing by the total credits that count toward GPA. For example, 3 credits at 4.5 and 2 credits at 3.5 equal 20 quality points; 20 ÷ 5 gives a 4.00 GPA.
Can I convert a 4.5 GPA directly to a 4.0 GPA?
A direct multiplier is only an estimate because the grade tables can differ. A more defensible conversion recalculates every course under the destination scale; for example, common 4.0 tables cap both A+ and A0 at 4.0 while a common 4.5 table gives A+ 4.5.
Do pass/fail courses count in GPA?
Pass/fail treatment depends on the institution. This calculator excludes P courses from GPA while listing their credits separately, and it includes F as 0 grade points with its credits in the GPA denominator. Check your registrar’s policy for the official result.
Are higher-credit courses more important for GPA?
Yes. GPA is credit-weighted, so a 4-credit course contributes twice as many quality points as the same grade in a 2-credit course. Averaging the visible course grades without credits can give the wrong GPA.
Are my grades sent to a server?
No. This GPA calculator runs in the browser and saves its course list only in this browser’s local storage. Grades and course names are not sent to a server.
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Updated 2026-10-13