How to Calculate GPA by Hand
A step-by-step method you can do with a pen and a phone calculator, plus the rules that trip most students up.
Calculators are fast, but knowing the math yourself means you can double-check your transcript, plan future semesters and spot errors. GPA is simply a weighted average: each grade is weighted by how many credits the course is worth. Once you understand that, every GPA question becomes the same four steps.
Step 1: Convert each letter grade to grade points
Most US high schools and colleges use the 4.0 scale. With plus and minus grades it usually looks like this:
| Grade | Points | Grade | Points |
|---|---|---|---|
| A / A+ | 4.0 | C+ | 2.3 |
| A- | 3.7 | C | 2.0 |
| B+ | 3.3 | C- | 1.7 |
| B | 3.0 | D+ | 1.3 |
| B- | 2.7 | D | 1.0 |
| F | 0.0 |
A few schools give 4.3 for an A+, and some do not use plus or minus grades at all. Use whatever your registrar publishes.
Step 2: Multiply points by credits to get quality points
Quality points (also called grade points earned or honor points) are the grade points multiplied by the course credits. A 4-credit class counts four times as much as a 1-credit lab, so its grade has more influence on your GPA.
Step 3: Add up quality points and GPA credits
Total the quality points for every graded course. Then total the credits for the same courses. Only include courses that count toward GPA (more on that below).
Step 4: Divide
GPA = total quality points ÷ total GPA credits
Full worked example
| Course | Credits | Grade | Points | Quality points |
|---|---|---|---|---|
| Calculus I | 4 | B+ | 3.3 | 13.2 |
| English Composition | 3 | A | 4.0 | 12.0 |
| Intro to Psychology | 3 | A- | 3.7 | 11.1 |
| Chemistry lab | 1 | B | 3.0 | 3.0 |
| Economics | 3 | C+ | 2.3 | 6.9 |
| Total | 14 | 46.2 |
GPA = 46.2 ÷ 14 = 3.30. If you had averaged the five grade points without credits you would get 3.26, which is close here but can be far off when credit values differ a lot. Always weight by credits.
You can paste the same courses into our GPA calculator to confirm the result.
What counts toward GPA and what does not
This is where most hand calculations go wrong. Policies vary, but these rules are common:
- Pass/fail or credit/no credit courses usually earn credits toward graduation but are left out of GPA. Leave both the points and the credits out.
- Withdrawals (W) usually appear on the transcript but carry no points and no GPA credits.
- Incompletes (I) are normally excluded until a final grade is posted. Some schools convert an unresolved incomplete to an F after a deadline.
- Failed courses (F) count. They add GPA credits but zero quality points, which is why one F can pull an average down quickly.
- Transfer credits often count toward your degree but not toward your GPA at the new school.
- Repeated courses depend on the school. Some replace the old grade, some average both attempts, some keep both. See our guide on raising your GPA for how this affects planning.
Your transcript often shows two credit totals: earned credits (credits you passed) and GPA credits or attempted GPA hours. Use GPA credits in the formula.
Calculating cumulative GPA from semester GPAs
You cannot simply average your semester GPAs unless every semester had exactly the same number of credits. Instead, turn each semester back into quality points:
| Term | GPA | GPA credits | Quality points |
|---|---|---|---|
| Fall | 3.20 | 15 | 48.0 |
| Spring | 3.80 | 12 | 45.6 |
| Summer | 3.00 | 6 | 18.0 |
| Total | 33 | 111.6 |
Cumulative GPA = 111.6 ÷ 33 = 3.38. A simple average of the three GPAs would give 3.33, which is wrong because the summer term had fewer credits. The cumulative GPA calculator does this automatically.
Calculating GPA from percentages
If your classes report percentages instead of letters, first convert each percentage to a letter using your school's scale (for example 90 to 92 might be an A-), then to points. Do not convert your average percentage straight to a GPA: two students with an 85% average can have different GPAs depending on how their individual grades fall across letter boundaries. Our GPA to percentage converter includes a reference table.
Checking your work
- Your GPA must sit between your lowest and highest grade points. If you get 4.2 on an unweighted scale, something is off.
- Your total GPA credits should match the number printed on your transcript or student portal.
- Round only at the end. Rounding each quality point can shift the final number by a few hundredths.
- Many schools truncate rather than round (3.497 becomes 3.49, not 3.50). This matters for cutoffs such as 3.5 honors.
Weighted classes
If your high school adds points for honors or AP classes, use the weighted point value in Step 1 and everything else stays the same. Read weighted vs unweighted GPA for the common bonus values and examples.
Frequently asked questions
Do I divide by the number of classes or the number of credits?
By credits. Dividing by the number of classes only works when every class has the same credit value.
Does a pass/fail class affect GPA?
Usually not. A pass earns credit toward graduation but no grade points, so it is left out of both the top and bottom of the GPA formula. A fail on a pass/fail basis is also usually excluded, but check your school policy.
Should I round my GPA?
Keep full precision while calculating and round at the end. Many schools report GPA to two or three decimal places, and some truncate instead of rounding.
How do I calculate GPA if my school uses percentages?
Convert each course percentage to a letter grade using your school scale, then to grade points, then follow the normal credit-weighted formula.