How to Calculate Your GPA
4 min read · Last reviewed July 1, 2026
A grade point average condenses all your course grades into a single number, which is why it shows up on transcripts, applications, and scholarship criteria. Calculating it yourself takes the mystery out of where you stand.
This guide explains the grade-point system, why credit hours change the answer, and how to work out the grades you'll need to reach a target GPA.
Grade points and the scale
Most systems convert letter grades to points on a 4.0 scale: A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0, often with pluses and minuses in between (an A− might be 3.7). Check your institution's exact scale, as they differ.
Your GPA is the average of these grade points — but a weighted average, not a simple one, because not every course is worth the same.
Why credit hours matter
Each course carries a number of credit hours reflecting its size. To find your GPA, multiply each course's grade points by its credit hours, add those up, then divide by the total credit hours.
Say you take a 4-credit course with an A (4.0) and a 2-credit course with a C (2.0): that's (4 × 4.0) + (2 × 2.0) = 20 quality points over 6 credits, giving 20 ÷ 6 = 3.33. Averaging the grades naively would have given 3.0 — the credits pull the result toward the bigger course.
Working out the grades you need
To hit a target GPA, work with quality points. Multiply your target by your total planned credits to find the quality points you need overall, subtract what you've already earned, and you'll see what the remaining courses must deliver.
This turns a vague goal into a concrete plan — for example, showing that you need mostly A grades this term to lift a cumulative GPA, or that a B average is comfortably enough.
Frequently asked questions
▶How is GPA calculated?
Multiply each course's grade points by its credit hours, add the results, then divide by your total credit hours. It's a credit-weighted average, so larger courses count more.
▶What's the difference between weighted and unweighted GPA?
An unweighted GPA treats every course the same on a 4.0 scale. A weighted GPA gives extra points for harder courses (like honours or AP), so it can exceed 4.0.