GPA Calculator
Your grade point average summarises your grades in one number. Each letter grade is worth a number of points, courses with more credits count more, and the GPA is the total points divided by the total credits. This calculator uses the common 4.0 plus/minus scale and shows every step, so you can also see how an upcoming grade would change your average.
How to use the gpa calculator
- Type each course as a letter grade followed by its credits, separated by commas: A 3, B+ 4.
- Read your GPA, the total credits and the quality points.
- Add a planned grade to see how it would move your GPA.
Formula
GPA = Σ(grade points × credits) ÷ Σ(credits). Grade points on the common scale: A 4.0, A− 3.7, B+ 3.3, B 3.0, B− 2.7, C+ 2.3, C 2.0, C− 1.7, D+ 1.3, D 1.0, D− 0.7, F 0.0. Schools differ, so check your own school’s scale.
Worked examples
Four courses
A (3 credits), B+ (4), A− (3) and C (2) give 12 + 13.2 + 11.1 + 4 = 40.3 points over 12 credits, a GPA of 3.358.
The effect of credits
A high grade in a 4-credit course lifts your GPA more than the same grade in a 1-credit course.
How GPA works
The 4.0 scale
| Grade | A | A− | B+ | B | B− | C+ | C | D | F |
|---|---|---|---|---|---|---|---|---|---|
| Points | 4.0 | 3.7 | 3.3 | 3.0 | 2.7 | 2.3 | 2.0 | 1.0 | 0.0 |
Credits carry the weight
Because GPA is weighted by credit hours, a 4-credit science course affects your GPA four times as much as a 1-credit elective. Planning where to put effort can pay off.
Projecting a future GPA
Suppose you have 30 credits at a 3.2 GPA (96 points) and plan a 15-credit semester at 3.8 (57 points). Your new GPA is 153 ÷ 45 = 3.4. Enter your existing courses and the planned ones together to see the same result.
Cumulative versus semester GPA
A semester GPA covers one term; the cumulative GPA covers everything. Enter all your courses to calculate the cumulative figure. If your school has its own rules for repeats, pass/fail or transfers, follow those.
Practice problems
Try these yourself first, then check your answer. The answers come from the calculator above.
- Find the GPA for A 4, A- 3, B 3 and B+ 2.
Show answer
GPA (4.0 scale): 3.558
- Find the GPA for B 3, C+ 3, A 4 and D 2.
Show answer
GPA (4.0 scale): 2.825
Common mistakes to avoid
- Averaging the grade points without weighting by credits.
- Using a scale that differs from your school’s. Some schools give A+ a 4.3.
- Forgetting to include repeated or pass/fail courses according to your school’s rules.
Frequently asked questions
How is GPA calculated?
Multiply each course’s grade points by its credits, add them up and divide by the total credits.
What is a good GPA?
It depends on the school and goals. Many people consider 3.0 solid and 3.5 or above strong, but requirements vary.
Is a weighted GPA different?
Yes. Some schools give extra points for honours or AP courses, so their GPA can exceed 4.0. This tool uses the unweighted 4.0 scale.
How do I find the grade I need for a target GPA?
Use the grade calculator for a single course.
Reviewed September 26, 2026 by the SolveCalcPro editorial team. Found a mistake? Tell us; see our editorial policy.