Your unweighted GPA is the average of all your course grades on a standard 4.0 scale, with no extra points for harder classes. To calculate it, you convert each letter grade to its point value, add those values together, and divide by the total number of classes. The math is simple once you know the conversion scale.
The 4.0 Scale Conversion
Every letter grade translates to a number on the 4.0 scale:
- A = 4.0
- B = 3.0
- C = 2.0
- D = 1.0
- F = 0.0
If your school uses plus and minus grades, the values shift slightly. An A- is typically 3.7, a B+ is 3.3, a B- is 2.7, and so on, with each plus adding 0.3 and each minus subtracting 0.3 from the base value. An A+ is still capped at 4.0 on an unweighted scale at most schools.
The key feature of the unweighted system is that every class counts the same. An A in AP Chemistry and an A in a regular elective both earn 4.0 points. The difficulty of the course doesn’t change the number.
The Calculation Step by Step
Here’s the formula: add up the grade points for every class, then divide by the number of classes.
Say you took five classes this semester and earned the following grades: A in English (4.0), A in History (4.0), A in Biology (4.0), B in Math (3.0), and C in Spanish (2.0). Add those up: 4.0 + 4.0 + 4.0 + 3.0 + 2.0 = 17.0. Divide by 5 classes. Your unweighted GPA is 3.4.
For a cumulative GPA across multiple semesters or years, apply the same process to every course you’ve completed. If you’ve taken 24 classes over two years, add the point values for all 24 and divide by 24. You’re not averaging your semester GPAs together; you’re going back to the individual course grades and running the full calculation.
A Longer Example
Suppose you’re a junior looking at your transcript from 9th and 10th grade combined. You took 12 classes and earned these grades: four As, three A-minuses, three Bs, one B+, and one C+. Convert each one:
- 4 As: 4.0 × 4 = 16.0
- 3 A-minuses: 3.7 × 3 = 11.1
- 3 Bs: 3.0 × 3 = 9.0
- 1 B+: 3.3
- 1 C+: 2.3
Total points: 16.0 + 11.1 + 9.0 + 3.3 + 2.3 = 41.7. Divide by 12 classes. Your cumulative unweighted GPA is 3.475, which you’d typically round to 3.48.
How Pass/Fail Classes Factor In
If you pass a pass/fail class, it generally has no effect on your GPA. The credit counts toward your transcript, but no grade points are added or subtracted. If you fail a pass/fail class, the impact depends on your school’s policy. Some schools add zero points to your total while still counting the class in your divisor, which drags your GPA down. Others exclude the course from the GPA calculation entirely, though you still won’t receive credit for it. Check your school’s handbook if you’re unsure which approach applies to you.
Withdrawals (often marked “W” on a transcript) typically don’t affect GPA either, since the course is treated as if it was never completed for grading purposes.
What Makes This Different From Weighted GPA
A weighted GPA gives bonus points for advanced coursework. In a weighted system, an A in an AP, IB, or honors class might be worth 4.5 or even 5.0 points instead of 4.0. That’s why weighted GPAs can exceed 4.0, sometimes reaching 4.5 or higher.
An unweighted GPA strips all that away. It treats every class equally, which makes it a clean apples-to-apples comparison of grades but doesn’t reward you for taking tougher courses. A student who earned Bs in a full AP schedule could have a lower unweighted GPA than a student who earned As in all standard-level classes.
Why Colleges Care About Unweighted GPA
Many colleges recalculate applicant GPAs on an unweighted scale regardless of what your transcript shows. They then perform a separate rigor assessment to see how many of your courses were honors, AP, or IB. This two-step approach lets admissions offices compare grades fairly across high schools that use different weighting systems.
Not every college recalculates. Some review the GPA your high school reports and assess course rigor alongside it. Either way, admissions readers look at patterns across your transcript, particularly grades from 9th through 11th grade, and often review first-semester 12th-grade marks as well. An upward trend in grades can work in your favor even if your overall number isn’t perfect. Colleges want to see that you challenged yourself with harder courses where it made sense, even if those classes didn’t all produce straight As.
Quick Way to Check Your Work
If you want a rough sanity check, think of it this way: a 4.0 means straight As, a 3.0 means straight Bs, and a 2.0 means straight Cs. Your GPA should land somewhere between the grade you earn most often and the grades around it. If you mostly get As with a few Bs, your GPA should fall in the 3.5 to 3.9 range. If you’re getting a number outside that ballpark, recheck your grade-to-point conversions.
You can also run this calculation for a single semester, a single year, or your entire high school career. The formula never changes: total grade points divided by total number of classes.