How to Calculate GPA: Grade Points, Credits and Cumulative GPA Explained
Your GPA looks like one small number, but colleges, scholarships and employers lean on it hard. The good news is that the maths behind it is simple once you see it clearly. This guide explains how to calculate GPA from scratch: turning letter grades into points, weighting them by credit hours, and blending semesters into a cumulative GPA. Every step has a worked example, so you can check your own number as you read.
Step 1: Turn letter grades into grade points
GPA starts by converting every letter grade into points on the 4.0 scale. This conversion is the same almost everywhere in the US:
| Letter grade | A range | Grade points |
|---|---|---|
| A | 93–100% | 4.0 |
| A− | 90–92% | 3.7 |
| B+ | 87–89% | 3.3 |
| B | 83–86% | 3.0 |
| B− | 80–82% | 2.7 |
| C+ | 77–79% | 2.3 |
| C | 73–76% | 2.0 |
| C− | 70–72% | 1.7 |
| D+ | 67–69% | 1.3 |
| D | 63–66% | 1.0 |
| D− | 60–62% | 0.7 |
| F | Below 60% | 0.0 |
If your grades come as percentages, convert them with this table first (or the grade percentage calculator). Our grading scale chart explains the variations some schools use.
Step 2: Weight each grade by its credit hours
Not every course counts equally. A 4-credit course influences your GPA four times as much as a 1-credit course, because you spent roughly four times the hours in it. So multiply each course's grade points by its credits — the result is sometimes called quality points.
Step 3: Add up and divide — a worked example
Take a semester of four courses:
| Course | Grade | Points | Credits | Points × credits |
|---|---|---|---|---|
| Biology | A | 4.0 | 4 | 16.0 |
| History | B+ | 3.3 | 3 | 9.9 |
| English | A− | 3.7 | 3 | 11.1 |
| Art | B | 3.0 | 2 | 6.0 |
| Total | — | — | 12 | 43.0 |
GPA = 43.0 ÷ 12 = 3.583, which rounds to 3.58. That is the whole calculation: total quality points ÷ total credits. Do it for one term and you have a term GPA; do it for every course you have ever taken and you have your cumulative GPA. The GPA calculator runs both versions instantly.
Cumulative GPA: blending old and new terms
You do not need every old course to update a cumulative GPA — just your current cumulative GPA and the credits behind it. Multiply your current GPA by your completed credits (that reconstructs your total quality points), add this term's quality points, and divide by the new credit total.
Example: a 3.40 GPA over 60 credits is 204 quality points. A strong 15-credit term at 3.80 adds 57 points. New cumulative GPA = (204 + 57) ÷ 75 = 261 ÷ 75 = 3.48. Notice how a whole semester of excellent work moved the cumulative number by only 0.08 — the more credits you bank, the steadier your GPA becomes, in both directions. Our calculator's Cumulative mode does this blend for you.
Weighted GPA: the Honors and AP version
High schools often weight harder courses: Honors classes add +0.5 points and AP classes +1.0 point to the grade points of a passed course, capping each course at 5.0. A B in an AP course (3.0) then counts as 4.0. Weighted GPA can therefore exceed 4.0 — a 4.6 weighted GPA is common for strong students.
Colleges know schools weight differently, so many recalculate every applicant's GPA unweighted on the plain 4.0 scale and judge course difficulty separately. It is worth knowing both of your numbers — the high school GPA calculator shows them side by side.
What your GPA is used for
- College admissions — the single most-read number on most applications, alongside course rigor.
- Scholarships and honours — many set hard cut-offs, commonly 3.0 or 3.5.
- Academic standing — falling below 2.0 usually triggers academic probation in college.
- Jobs and internships — some employers screen recent graduates at 3.0 or above.
Not sure where your official number lives? Our guide on how to find your GPA shows the three places schools publish it. And to protect the GPA you have, keep an eye on individual course grades with the grade calculator before they become transcript entries.
GPA Calculator
Term and cumulative GPA with credit weighting — enter your courses and get your number instantly.
Open the GPA CalculatorQuestions about this topic
How to calculate GPA from percentage grades?
Convert each percentage to a letter grade first (93%+ = A = 4.0, 90–92% = A- = 3.7, 87–89% = B+ = 3.3, 83–86% = B = 3.0, down to F = 0.0), then weight the points by credit hours, add them, and divide by total credits. The grade percentage calculator handles the conversion step.
What is the GPA formula?
GPA = Σ(grade points × credit hours) ÷ Σ(credit hours). Multiply each course's grade points by its credits, sum those products, and divide by the total number of credits.
Can my GPA be higher than 4.0?
Only on a weighted scale. Unweighted GPA caps at 4.0 because an A is worth 4.0 points. Weighted high-school GPAs add Honors (+0.5) and AP (+1.0) bumps, so they can reach 5.0. When a form asks for your GPA 'on a 4.0 scale', always give the unweighted number.
How much does one F hurt my GPA?
An F earns 0 points but its credits still count in the divisor, so the damage is real: one 3-credit F in a 15-credit term of otherwise A's turns a 4.0 term into (4.0×12 + 0×3) ÷ 15 = 3.20. Retaking the course helps if your school replaces the grade — policies differ, so check yours.
Do all colleges calculate GPA the same way?
The core formula is universal, but details vary: some schools use whole letters only (no plus/minus), some count A+ as 4.3, and some exclude certain courses. Your transcript's GPA is the official one; use this method to predict and verify it.
Keep reading
How to Calculate Your Grade: The Weighted Method, Step by Step
Learn how to calculate your grade the way your teacher does: the weighted method with a full worked example, the points method, and the mistakes that make averages lie.
How to Find Your GPA: Where It Is Published and How to Check It Yourself
Wondering how to find your GPA? Here is where schools publish it (portal, transcript, report card), how to request an official copy, and how to work it out yourself in minutes.