Weighted vs. unweighted GPA: how each is calculated

Your transcript can produce two different GPAs, and people mix them up constantly. Unweighted GPA treats every course the same: an A is a 4.0 whether it came from a standard class or AP Calculus. Weighted GPA gives extra points for harder courses, so the same transcript can produce a number above 4.0.

Neither one is more "real." They answer different questions, and which one matters depends on who is reading your transcript.

How unweighted GPA is calculated

Unweighted GPA is a credit-weighted average of your grade points. Convert each letter grade to points, multiply by the course's credits, add those up, and divide by total credits.

The most common 4.0-scale convention is A = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, and so on down to F = 0.0. Your school's registrar page is the final word on its exact scale, as covered in what GPA a B+ is. If you only need to translate a single grade, the grade to GPA converter is faster than a spreadsheet.

How weighted GPA is calculated

Weighted GPA uses the same arithmetic with one change: each course gets a bonus on top of its grade points based on its level. A common convention is +0.5 for honors and +1.0 for AP or IB. Many schools do it this way, but it is a convention and not a rule. Some schools use different bonuses, some only weight AP, some use a 5.0 scale, and some do not weight at all.

The GPA calculator uses honors +0.5 and AP/IB +1.0 and shows both numbers side by side. If your school weights differently, treat its output as an estimate and check your school's policy.

A worked example

Four courses, with credits and levels:

Multiply each course's points by its credits, then add them up:

• Unweighted: (4.0 x 3) + (3.3 x 4) + (3.7 x 4) + (3.0 x 3) = 12.0 + 13.2 + 14.8 + 9.0 = 49.0 quality points over 14 credits, so 3.50.
• Weighted: (4.0 x 3) + (4.3 x 4) + (4.2 x 4) + (3.0 x 3) = 12.0 + 17.2 + 16.8 + 9.0 = 55.0 quality points over 14 credits, so 3.93.

Same four grades, a 0.43 gap. The B+ in AP Calculus counts as a 4.3 in the weighted version, which is more than the A in English.

Can you convert one into the other?

Not from the numbers alone. A weighted 3.93 does not tell you how many of the courses were honors or AP, so you cannot back out the unweighted GPA from it. To go in either direction you need the course list: each grade, its credits, and its level. That is why "unweighted to weighted GPA" tools ask you to enter courses and not a single number.

Which one matters

It depends on the reader. A school may report both on a transcript, and many colleges recalculate applicants onto their own scale anyway, so a converted figure is best treated as a planning number for tracking your own trend. If a scholarship or program names a specific GPA, read whether it means weighted or unweighted and which courses count. Pre-med students also face a separate science split, covered in BCPM GPA: what it is and how to calculate it.

Do not confuse this with a weighted grade

"Weighted" also shows up inside a single course, where homework, quizzes and exams count for different percentages of your grade. That is a different calculation from weighted GPA, which compares courses to each other. For the within-course version, see how to calculate your grade when categories are weighted and the weighted grade calculator.

If you are aiming for a target

Once you know your current numbers, how to calculate the GPA you need this semester shows how to turn a target cumulative GPA into the grades you need next term. Try it with the GPA calculator first so you are working from your real credits and levels.