🎓 GPA Calculator

How grade point average works

GPA converts letter grades into numbers, weights each by the credit hours of the course, and averages the result. A course worth four credits therefore influences your GPA twice as much as a two-credit course with the same grade.

GPA = Σ (grade points × credits) ÷ Σ credits

The most common US scale runs A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0. Many institutions add plus and minus modifiers, typically adding or subtracting 0.3, so a B+ is 3.3 and a B− is 2.7. A few cap A+ at 4.0 while others award 4.3.

Weighted, unweighted, and why they diverge

An unweighted GPA treats all courses identically and tops out at 4.0. A weighted GPA adds points for advanced coursework — commonly one extra point for AP or IB courses and half a point for honours — which is how a student can report a GPA above 4.0.

Because weighting schemes differ between schools, university admissions offices frequently recalculate GPA using their own formula, often stripping out non-academic courses. A weighted GPA is best understood as a signal about course rigour rather than a directly comparable number.

Why a GPA gets harder to move over time

The arithmetic is unforgiving. Each new semester is averaged against everything that came before, so the more credits you have accumulated, the less any single term can shift the total.

A student with 30 credits at 3.0 who earns a perfect 4.0 across the next 15 credits lands at about 3.33. The same student at 90 credits would move only to roughly 3.14. This is why early semesters carry disproportionate weight, and why recovering from a poor first year takes sustained effort rather than one strong term.

Some institutions allow grade replacement when a course is retaken, which removes the original from the calculation. Where that policy exists, retaking a failed prerequisite is often the single most efficient way to move a GPA.

Common questions

Do pass/fail courses affect GPA?

Usually not — they typically award credit without grade points, so they are excluded from the average entirely. A failing grade under some pass/fail schemes does still count as zero, so check the specific policy.

How does GPA convert to other systems?

There is no universal mapping. UK degree classifications, European ECTS grades, and Indian percentage systems all convert differently, and institutions publish their own equivalence tables.

What counts as a good GPA?

It depends entirely on context. Above 3.5 is generally strong, 3.0 is solid, and competitive graduate programmes often look for 3.7 or higher — but field, institution, and course difficulty all matter.