GPA Calculator

GPA Calculator

Grade point average is a credit-weighted mean, and the weighting is the part that trips people up. A course carrying four credits influences your GPA twice as much as a two-credit course with the same grade, so an A in a small elective does considerably less for you than a B in a heavy core subject. This calculator takes grades and credit hours as pairs — for instance "A 3, B+ 4, C 2" — and returns the weighted GPA on the standard 4.0 scale along with total credits and quality points. Enter the courses in any order. The sections below cover the plus-minus mapping most institutions use, the difference between weighted and unweighted GPA, and how much a single grade can realistically move an average once you have accumulated credits.

How this is calculated

Each grade converts to grade points on the 4.0 scale, then multiplies by the course's credit hours to give quality points. GPA = total quality points ÷ total credit hours.

Worked example on A 3, B+ 4, C 2: the A gives 4.0 × 3 = 12 quality points, the B+ gives 3.3 × 4 = 13.2, and the C gives 2.0 × 2 = 4. Total quality points 29.2 across 9 credits, so the GPA is 29.2 ÷ 9 = 3.24.

Note what the weighting did. The B+ contributed more quality points than the A, because it carried more credits. Averaging the grade points without weighting would have given 3.1 — a different and less accurate answer.

The standard 4.0 mapping

A and A+ are 4.0, A− is 3.7, B+ is 3.3, B is 3.0, B− is 2.7, C+ is 2.3, C is 2.0, C− is 1.7, D+ is 1.3, D is 1.0, and F is 0.

Institutions vary at the edges. Some award 4.3 for an A+, some do not use plus and minus grades at all, and some exclude pass or fail courses from the calculation entirely. Where your institution's scale differs, the arithmetic here still holds — only the point values change.

Why one grade moves less than you expect

The weighting cuts both ways. Early in a degree, when total credits are low, each grade has substantial leverage. After sixty or ninety credits, a single course changes the cumulative average by a few hundredths of a point at most.

The practical implication is that recovery from a poor start takes sustained results rather than one strong semester. To raise a 2.8 across 60 credits to a 3.0, you need roughly 30 further credits at close to 3.4 — the arithmetic of averages is unforgiving in a way that motivational advice usually is not.

Weighted GPA at secondary level is a separate concept: honours and advanced courses are assigned extra points, sometimes on a 5.0 scale, so that difficulty is reflected. Do not mix a weighted secondary GPA with an unweighted university one when comparing.

How to use the gpa calculator

List each course as a grade and credit pair. Separate pairs with commas, for example "A 3, B+ 4, C 2". Order does not matter.
Use your institution's credit hours. The weighting depends on them. Using the wrong credit values is the main reason a calculated GPA does not match a transcript.
Check total credits against the transcript. If the credit total is right and the GPA still differs, your institution likely uses a variant scale — an A+ worth 4.3, or excluded pass/fail courses.

Frequently asked questions

What GPA do the letter grades map to?

A/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, F 0. Some schools weight honors/AP courses higher.

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

Because GPA is a credit-weighted average, not a plain one. A four-credit course contributes twice the quality points of a two-credit course at the same grade. An A in a small elective moves your average less than a B in a heavy core subject.

How much can one semester change my cumulative GPA?

Less than you would like once you have accumulated credits. Raising a 2.8 across 60 credits to a 3.0 takes roughly 30 further credits averaging close to 3.4. Early grades carry far more leverage than later ones.

What is the difference between weighted and unweighted GPA?

Unweighted uses the standard 4.0 scale regardless of course difficulty. Weighted, common at secondary level, awards extra points for honours and advanced courses, sometimes on a 5.0 scale. They are not comparable — check which a given figure refers to before drawing a conclusion from it.