How to calculate your GPA (weighted and unweighted)
Short answer
Turn each grade into points on the 4.0 scale (A=4, B=3, C=2, D=1, F=0), multiply each by that course's credit hours, add those products up, and divide by your total credit hours. A five-course, 15-credit semester of A, B, C, A, B works out to 3.13 unweighted. Weighted GPA does the same thing but first adds a bonus for honors (+0.5) and AP courses (+1.0), which pushes that same semester to about 3.53. Grading scales vary by school, so check your own before relying on a number.
GPA formula
GPA = sum(grade points x credit hours) / sum(credit hours)
- •grade points come from the 4.0 scale: A=4, B=3, C=2, D=1, F=0
- •credit hours are the number of credits each course carries
- •for weighted GPA, add the bonus first (+0.5 honors, +1.0 AP/IB) before multiplying by credit hours
- •sum across every course in the term, or every course taken for a cumulative GPA
- •the numerator is total quality points; the denominator is total credit hours
The 4.0 scale: turning letters into points
GPA stands for grade point average, and the first step is converting each letter grade into a number. Most U.S. schools use the 4.0 scale, where an A is worth the most and an F is worth nothing. These numbers are called grade points.
Many schools also use plus and minus grades, which land between the whole numbers: an A- is usually 3.7, a B+ is 3.3, a B- is 2.7, and so on. If your school does not use pluses and minuses, ignore them and stick to the whole-number values below.
- A = 4.0 grade points
- B = 3.0 grade points
- C = 2.0 grade points
- D = 1.0 grade points
- F = 0.0 grade points
Credit hours: why some classes count more
A GPA is not just the average of your grade points, because not every class is the same size. A four-credit lab science takes up more of your schedule than a one-credit elective, so it should carry more weight in your average. Credit hours are how that weighting is built in.
The trick is to multiply each course's grade points by its credit hours before you average anything. That product is often called quality points. A B (3.0) in a 4-credit class earns 12 quality points, while the same B in a 1-credit class earns only 3. Skipping this step, and averaging the grade points straight across, is the single most common GPA mistake.
The GPA formula
Once you understand quality points, the formula is short. Add up the quality points from every course, then divide by the total number of credit hours you took.
That single division is the whole calculation. Everything else is just filling in the two sums correctly.
- Grade points come from the 4.0 scale (A=4, B=3, C=2, D=1, F=0)
- Credit hours are the number of credits each course is worth
- Multiply grade points by credit hours for each course, then add those products
- Divide by the sum of all credit hours to get the GPA
Worked example: a five-course semester
Take a typical 15-credit semester with five classes: an A in English 101 (3 credits), a B in Calculus I (4 credits), a C in Chemistry (4 credits), an A in U.S. History (3 credits), and a B in a 1-credit fitness elective.
Convert each grade to points, multiply by credit hours to get quality points, and lay it out:
English 101: A = 4.0, times 3 credits = 12.0 quality points. Calculus I: B = 3.0, times 4 = 12.0. Chemistry: C = 2.0, times 4 = 8.0. U.S. History: A = 4.0, times 3 = 12.0. Fitness elective: B = 3.0, times 1 = 3.0.
Add the quality points: 12 + 12 + 8 + 12 + 3 = 47. Add the credit hours: 3 + 4 + 4 + 3 + 1 = 15. Divide: 47 divided by 15 = 3.13. That is your unweighted GPA for the semester. Notice the C in a heavy 4-credit class is what pulls the average down below the two A's.
Weighted GPA: the honors and AP bonus
Unweighted GPA treats every class the same, so an A in a demanding AP course looks identical to an A in study hall. Weighted GPA fixes that by adding a bonus to harder courses before you multiply by credit hours. The common bonuses are +0.5 for honors classes and +1.0 for Advanced Placement (AP) or International Baccalaureate (IB) courses.
Reuse the same semester, but say Calculus I was an AP course and Chemistry was honors. The AP B becomes 3.0 + 1.0 = 4.0, and the honors C becomes 2.0 + 0.5 = 2.5. The three regular courses stay as they were.
Recompute the quality points: English 4.0 x 3 = 12, AP Calculus 4.0 x 4 = 16, honors Chemistry 2.5 x 4 = 10, History 4.0 x 3 = 12, elective 3.0 x 1 = 3. That totals 53 quality points over the same 15 credits, so 53 divided by 15 = 3.53. The exact same grades produce a 3.53 weighted GPA versus a 3.13 unweighted one, purely because two of the classes carried a difficulty bonus.
Weighting scales are not universal. Some schools add the bonus only to the grade points, some cap the boost, and a few use a 5.0 top end for weighted GPA. Always confirm how your own school does it before comparing numbers with anyone else.
Cumulative versus semester GPA
A semester GPA covers one term. A cumulative GPA is your running average across every term, and it is the number colleges and scholarships usually care about. You do not average the two semester GPAs together, because that ignores how many credits each one holds.
Instead, combine the raw totals. Suppose the 3.13 semester above (47 quality points, 15 credits) is followed by a stronger second semester earning a 3.60 over another 15 credits. That second term is 3.60 x 15 = 54 quality points. Add both terms: 47 + 54 = 101 quality points over 15 + 15 = 30 credits. Divide: 101 divided by 30 = 3.37 cumulative GPA.
This is why a rough first term is not permanent, but also why it lingers: every future grade is averaged against all the credits already on your record.
How to raise your GPA
Raising a GPA is slower than it feels, because a cumulative average has inertia. The more credits you have already earned, the more new high grades it takes to move the number.
Say you are sitting at that 3.37 cumulative (101 quality points, 30 credits) and you add a flawless 15-credit semester of straight A's, which is 60 quality points. The new average is 161 divided by 45 = 3.58. A perfect term moved a 3.37 up only about two-tenths, because it is being averaged against 30 credits of past work. The practical takeaways follow from that math.
- Protect your high-credit classes first: an A in a 4-credit course moves your GPA far more than an A in a 1-credit one.
- Act early, while you have fewer credits on record and each new grade carries more weight in the average.
- Retake failed or low courses if your school replaces the old grade, since removing an F or D from the denominator has an outsized effect.
- Do not overload on hard classes in a term you are trying to recover, since a fresh low grade digs the hole deeper.
- Check whether dropping a course before the deadline keeps it off your GPA entirely rather than leaving a low grade on it.
Frequently Asked Questions
Can a weighted GPA go above 4.0?+
Yes. That is the whole point of weighting. Because honors classes add about +0.5 and AP or IB classes add about +1.0 before the average is taken, a student loaded with tough courses and top grades can finish above 4.0, sometimes landing near 4.5 or higher on scales that allow it. An unweighted GPA, by contrast, is capped at 4.0 because a straight A is worth exactly 4.0 with no bonus. This is why you cannot compare a weighted number to an unweighted one directly. Always confirm which scale a figure is on before reading anything into it.
Do pass/fail or withdrawn courses count in my GPA?+
Usually not, but it depends on your school. A pass/fail course typically earns credit toward graduation without adding grade points, so it sits outside the GPA calculation entirely, neither helping nor hurting. A withdrawal (a W on your transcript) also normally carries no grade points and is left out of the average, though it still shows on the record. Incompletes and audits are handled differently again. Because policies vary, check your registrar's rules before assuming a class is excluded, and leave any truly non-graded course out of both the quality-point total and the credit-hour total when you do the math.
Do colleges look at weighted or unweighted GPA?+
Both, and many recalculate it themselves. Admissions offices know that weighting schemes differ wildly between high schools, so a raw weighted GPA is hard to compare fairly. A common approach is to strip the weighting back out to an unweighted number, then look separately at the rigor of your course load, meaning how many honors and AP classes you actually took. So the honors and AP courses still matter, just through the transcript rather than only through the inflated number. The safest move is to report exactly what your school calculates and let each college apply its own method.
How much can one bad grade really hurt my GPA?+
It depends on two things: the credit hours of that class and how many credits you already have. Early on, with few credits on record, a single low grade swings the average a lot. Later, that same grade barely moves it because it is diluted by everything else. Credit weight matters just as much. In the worked example, the C fell in a 4-credit chemistry class and dragged a two-A semester down to 3.13; the same C in a 1-credit elective would have hardly registered. So a poor grade in a heavy course early in your studies does the most damage, and a strong finish is the reliable way to recover from it.
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