GPA Explained

Your GPA, or grade point average, is a single number that summarizes your grades: each letter grade is worth points — typically A = 4, B = 3, C = 2, D = 1, F = 0 on the standard 4.0 scale — and your GPA is the average of those points, weighted by credit hours. Compute yours instantly with our free GPA calculator, then read on for how schools determine it and what moves it.

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What is a GPA?

A GPA converts letter grades into one comparable number. On the unweighted 4.0 scale used by most American schools, an A is worth 4 points, a B is worth 3, a C is worth 2, a D is worth 1, and an F is worth 0. A student with all As has a 4.0; a mix of As and Bs lands somewhere between 3.0 and 4.0. Colleges, scholarship committees, and some employers use GPA as a quick academic signal, which is why it matters beyond a single report card — but it is not the whole picture, and admissions offices read it alongside course rigor, test scores, essays, and activities. If you want the mechanics rather than the summary, our guide to how to calculate GPA walks through the grade-point table and the averaging step with worked examples.

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How your GPA is determined

Your school determines your GPA in two steps. First it assigns grade points using its own scale — the standard 4.0 scale above, or a weighted scale that awards extra points for honors and Advanced Placement courses. Then it averages those points, weighting each course by its credit hours, so a 4-credit course moves the average more than a 1-credit course. That weighting is the part students most often miss: two students with the same letter grades can hold different GPAs if one earned the lower grade in a heavy course and the other in a light one. The exact scale and weighting rules live in your school's handbook or registrar's pages, and they differ between schools, which is why a GPA from one school is never perfectly comparable to a GPA from another. Our guide to how to calculate GPA covers the standard method, and the GPA calculator applies it to your own grades and credits.

Cumulative GPA vs semester GPA

Semester GPA covers one term; cumulative GPA covers everything, all semesters combined, weighted by credit hours. The cumulative figure is the one that appears on transcripts and that colleges and employers usually ask for, and it moves slowly once you have many credits banked — a single strong semester lifts a freshman cumulative GPA far more than it lifts a senior one, because the senior average is diluted by more prior credits. That inertia cuts both ways: a weak early semester is not fatal, because later strong semesters keep pulling the average up, but it takes sustained strong work to move a large cumulative base. To see the math on your own record, read how to calculate cumulative GPA, which works a two-semester example down to the final 3.40, and use the GPA calculator to test what your next semester would do to your total.

High school GPA, weighted and unweighted

High school GPAs come in two flavors. Unweighted GPA caps at 4.0 and treats every course equally, whatever its difficulty. Weighted GPA adds extra points — commonly 0.5 for honors and 1.0 for Advanced Placement or International Baccalaureate courses — so a weighted GPA can exceed 4.0, sometimes reaching 5.0 on a fully weighted scale. Colleges usually recalculate applicants onto a common scale anyway, which is why the unweighted figure is the safer number to compare across schools. If you are in high school, our guide to how to calculate GPA for high school covers both scales and the weighted-vs-unweighted choice, and the GPA calculator handles either scale if you enter your school's point values.

Repeated classes and pass/fail grades

Two special cases change the calculation, and both depend on your school's policy, so check the handbook before assuming anything. For repeated classes, some schools replace the old grade entirely with the new one, while others average the two attempts or keep both on the record — the difference can move a GPA by tenths of a point. Our guide to how to calculate GPA with repeated classes covers the replacement and averaging rules. For pass/fail classes, a pass usually earns credit without affecting the GPA at all, while a fail may or may not count depending on the school; our guide to how to calculate GPA with pass/fail classes explains both treatments. When in doubt, your registrar's published policy beats any general guide, including this one.

Tools and guides in this family

Compute any GPA with the GPA calculator — semester, cumulative, weighted, or unweighted. Read how to calculate GPA for the standard method, how to calculate cumulative GPA for the all-semesters average, how to calculate GPA for high school for weighted scales, GPA with repeated classes, and GPA with pass/fail classes for the edge cases. Two of our most-searched pages are also handy: the minutes to hours converter for study-time planning, and our text to binary converter for encoding grade data. The habit that raises a GPA is unglamorous and reliable: protect the heavy-credit courses first, because they move the average most.