GPA Calculator

Calculate your grade point average from course grades and credit hours.

Please note: Grading rules vary by institution, and many schools round, cap or weight differently. Always confirm against your own syllabus or registrar before relying on a result.

What the GPA Calculator does

Grade point average is the credit-weighted mean of your grade points. Each course grade converts to points on your institution’s scale, gets multiplied by that course’s credit hours to give quality points, and the total is divided by total credits — so heavier courses move your GPA more.

Formula

Quality points = Grade points × Credit hours
GPA = Σ Quality points ÷ Σ Credit hours
Weighted: add +0.5 for honours, +1.0 for AP or IB

Inputs explained

Input	Unit	Required	Notes
Grade scale	one of 3 options	Yes	Check your syllabus — schools differ on whether an A+ is worth more than an A.
Course grades	text	Yes	Letters such as A, B+ or C-, or grade points such as 3.7. One per course.
Credit hours	text	Yes	One per course, in the same order as the grades.
Course weighting	one of 2 options	Yes	—
Course types	text	Optional	One per course: regular, honors or ap. Shown Course weighting is Weighted — honours and AP earn bonus points.

How to use it

Choose Grade scale and Course weighting.
Enter Course grades and Credit hours.
Fill in the remaining inputs the form shows for your choice.
Select Calculate.

Worked example

Five courses graded A, B+, A-, B and C+ carrying 3, 4, 3, 3 and 2 credits.

Grades: A, B+, A-, B, C+
Credits: 3, 4, 3, 3, 2
Scale: US 4.0 plus/minus

Quality points 12 + 13.2 + 11.1 + 9 + 4.6 = 49.9 over 15 credits, giving a GPA of 3.327.

Reading the result

"GPA as a percentage of the maximum" normalises across different scale maximums — a 3.3 on a 4.0 scale and a 3.5 on a 4.3 scale describe nearly the same standing once expressed this way.
When weighted, "bonus from weighting" isolates exactly how much of the GPA came from course difficulty rather than grade performance — useful for judging how much a headline number depends on course selection.

Assumptions and limitations

Pass/fail courses have no dedicated handling — the notes say to exclude them, but the calculator will convert whatever grade token is entered into points regardless.
The weighting bonuses (+0.5 honours, +1.0 AP/IB) are fixed values built into the calculator — some schools use different amounts or cap the bonus per course, which this does not accommodate.

Common mistakes

Comparing an unweighted GPA from here against another school's weighted GPA as if they were the same measure — the notes flag that weighted GPAs can exceed 4.0, and mixing the two bases produces a misleading comparison.

Frequently asked questions

What is the difference between weighted and unweighted GPA?

Unweighted treats every course the same on a 4.0 maximum. Weighted adds bonus points for harder courses, so an A in AP can be worth 5.0 — which is why weighted GPAs sometimes exceed 4.0.

Why does a course with more credits affect my GPA more?

Because GPA is credit-weighted. A 4-credit course contributes four times the quality points of a 1-credit course, so it carries four times the influence.

Do failed or retaken courses count?

Policies differ. Many institutions replace the original grade on a retake, others average both. Check your registrar before assuming an F drops off.