GPA Calculator
Enter your courses as grade points and credits to get your weighted GPA.
- 1
Total quality points
44.7Σ(grade points × credits) — each course's grade points multiplied by its credit hours, summed. - 2
Total credit hours
12 - 3
GPA
44.7 ÷ 12 = 3.73
Formula
How this is calculated
This calculator finds a credit-weighted grade point average. Each course line gives two numbers: the grade points you earned (the numeric value of your letter grade, such as 4.0 for an A on the common 4.0 scale) and the credit hours that course is worth. Grade points are unitless; credits are usually semester or quarter hours.
The logic mirrors the formula GPA = Σ(grade points × credits) ÷ Σ(credits). For every valid line it multiplies the grade points by the credits to get "quality points," adds up the quality points across all courses, and divides that sum by the total credits. Because each course is weighted by its credits, a 4-credit course moves the average roughly four times as much as a 1-credit course — a plain average of grades would be wrong whenever courses differ in size.
Assumptions and edge cases: lines without two numbers, or with zero or negative credits, are skipped silently and excluded from both totals. The result is only as accurate as your point conversions — you must convert letter grades using your own school's scale (4.0, 5.0 weighted, plus/minus, etc.). Pass/fail credits and transfer credits that don't carry grade points should be omitted, since they aren't part of the GPA itself.
Examples
| Input | Result |
|---|---|
| A (4.0, 3 cr), B (3.0, 4 cr), A- (3.7, 3 cr), C+ (2.3, 2 cr) | Quality points 39.7 / 12 credits = 3.31 GPA |
| Two courses: A (4.0, 3 cr) and B (3.0, 3 cr) | (12 + 9) / 6 = 3.50 GPA |
| A (4.0, 4 cr) and C (2.0, 1 cr) | (16 + 2) / 5 = 3.60 GPA, higher than the simple 3.0 average |
| All A grades across 15 credits | 60 / 15 = 4.00 GPA |
About this calculator
Grade point average, or GPA, condenses your course grades into a single number that summarizes academic performance, most commonly on a 4.0 scale. A weighted GPA accounts for the fact that courses carry different credit hours, so a five-credit course influences your average more than a one-credit elective. This GPA Calculator lets you enter each course's letter grade and credit value to produce an accurate weighted average rather than a simple, misleading mean of the letters.
The calculation rests on quality points. Each letter grade maps to a grade point value, where an A is 4.0, an A- is 3.7, a B is 3.0, a C+ is 2.3, and so on. You multiply each course's grade points by its credit hours to get quality points, sum the quality points across all courses, and divide by the total credit hours. The weighting by credits is what makes the result meaningful, because a high grade in a heavy course should count for more.
To use the calculator, add a row for each course, select or type the letter grade, and enter the number of credit hours. As you fill in your courses, the tool tallies your total credits and quality points and displays your cumulative GPA. You can add or remove rows freely to model future semesters or to see how a single grade would shift your average.
Reading the result is intuitive on the 4.0 scale: 4.0 is a straight-A average, around 3.5 reflects strong work, 3.0 is a solid B average, and 2.0 is the typical minimum for good standing. Because the figure is weighted, dropping a grade in a high-credit course moves your GPA more than the same drop in a one-credit class, which is useful when prioritizing study time.
A common mistake is averaging the grade points without weighting by credits, which distorts the result whenever courses differ in size. Another is using the wrong grade-point scale, since some institutions add weight for honors or AP courses, pushing a GPA above 4.0. Confirm your school's conversion table before relying on the number, and keep credit hours, not course counts, as the denominator.
Frequently asked questions
An unweighted GPA averages grade points equally regardless of course size or difficulty, capping at 4.0. A weighted GPA multiplies each grade by its credit hours (or adds bonus points for honors and AP courses), so heavier or harder classes count more and the result can exceed 4.0 in some systems.
Most schools use A = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, C+ = 2.3, C = 2.0, and so on down to F = 0.0. Always check your institution's official scale, as some omit plus and minus distinctions.
Dividing by total credit hours weights each course by its size, so a 4-credit class affects your GPA more than a 1-credit class. Dividing by the number of courses would treat every class as equal and produce an inaccurate average.
Add up the quality points (grade points times credits) from every course you have ever taken, then divide by the grand total of all credit hours. Do not average semester GPAs directly, because semesters with different credit loads would be weighted incorrectly.
Only on a weighted scale that awards bonus points for honors, AP, or IB courses, where an A might count as 5.0. On a standard unweighted 4.0 scale, an A is the maximum and the GPA cannot exceed 4.0.
The impact depends on the course's credit hours and your total credits. A low grade in a high-credit class pulls your GPA down more than the same grade in a small elective, and the effect shrinks as your total accumulated credits grow.
Also known as
TG we-Calculate Editorial Team. (2026). GPA Calculator [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/gpa-calculator
TG we-Calculate Editorial Team. "GPA Calculator." TG we-Calculate. 2026. https://we-calculate.com/calculator/gpa-calculator.
TG we-Calculate Editorial Team, "GPA Calculator," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/gpa-calculator
@misc{wecalculate_gpa_calculator, title = {GPA Calculator}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/gpa-calculator}}, year = {2026}, note = {TG we-Calculate} }
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