Weighted vs Unweighted GPA: What's the Difference?
If you're a high school student in the US, you've probably heard both terms and wondered which one matters. The short answer: both do — but for different reasons. Here's exactly how they work, with real examples.
What is unweighted GPA?
Unweighted GPA is the simplest GPA scale. Every letter grade maps to a fixed point value on a 4.0 scale, regardless of course difficulty. An A is always 4.0, a B is always 3.0, and a C is always 2.0 — whether you got that A in remedial English or AP Physics.
| Letter grade | Unweighted points |
|---|---|
| A | 4.0 |
| A− | 3.67 |
| B+ | 3.33 |
| B | 3.0 |
| B− | 2.67 |
| C+ | 2.33 |
| C | 2.0 |
| C− | 1.67 |
| D+ | 1.33 |
| D | 1.0 |
| D− | 0.67 |
| F | 0.0 |
The maximum unweighted GPA is 4.0, representing straight As. The formula is the same weighted average calculation — grade points × credits summed, divided by total credits.
What is weighted GPA?
Weighted GPA adds extra points for advanced coursework. The idea is to reward students who take more challenging classes — honours, Advanced Placement (AP), International Baccalaureate (IB), or dual-enrollment courses.
The most common weighted scale is 5.0, where an A in an AP/IB class is worth 5.0 instead of 4.0. Honours courses usually get a smaller boost — typically 0.5 extra points. Here's a typical breakdown:
| Course type | Grade | Unweighted | Weighted (5.0 scale) |
|---|---|---|---|
| Standard | A | 4.0 | 4.0 |
| Honours | A | 4.0 | 4.5 |
| AP / IB | A | 4.0 | 5.0 |
| Standard | B | 3.0 | 3.0 |
| Honours | B | 3.0 | 3.5 |
| AP / IB | B | 3.0 | 4.0 |
| Standard | C | 2.0 | 2.0 |
| Honours | C | 2.0 | 2.5 |
| AP / IB | C | 2.0 | 3.0 |
With weighted GPA, the maximum possible score depends on your school's scale. On a 5.0 scale, a student taking all AP/IB courses and getting straight As would have a 5.0 weighted GPA.
Side-by-side comparison
Here's a concrete example. Two students, same school, same semester — four courses each.
| Student | Courses | Grades | Unweighted | Weighted |
|---|---|---|---|---|
| Alex | English (standard), Algebra (standard), Biology (standard), History (standard) | A, A, B, A | 3.75 | 3.75 |
| Jordan | English (AP), Calculus (AP), Biology (honours), History (AP) | A, A, A, B | 3.75 | 4.875 |
Both students have the same unweighted GPA (3.75), but Jordan's weighted GPA (4.875) is significantly higher because they took advanced courses. Colleges see both — the unweighted number tells them how well you performed, and the weighted number tells them how hard you challenged yourself.
Which one do colleges use?
Both — but in different ways. Most US colleges and universities recalculate your GPA on an unweighted 4.0 scale during admissions. This levels the playing field so they can compare a student from a school with a 5.0 scale to one from a school with a 4.0 scale.
However, admissions officers also look at the weighted GPA alongside your course schedule. A high weighted GPA signals that you took advantage of the most challenging courses available at your school. Elite universities specifically look for this — they want to see that you've maximised the academic opportunities around you.
The bottom line: Your unweighted GPA is the standardised benchmark. Your weighted GPA (and the course list behind it) is the story of how you got there.
How to calculate your weighted GPA
The formula is the same as unweighted GPA, but with different grade point values for advanced courses:
Weighted GPA = Σ(weighted grade points × credits) ÷ Σ(credits)
Here's the step-by-step for a typical semester:
- List each course — include its type (standard, honours, or AP/IB)
- Find the weighted grade points — standard A = 4.0, honours A = 4.5, AP A = 5.0
- Multiply by credits — each course's weighted points × its credit hours
- Sum and divide — total weighted points ÷ total credits
Example: AP Chemistry (A, 4 credits) = 5.0 × 4 = 20.0. Honours English (B, 3 credits) = 3.5 × 3 = 10.5. Standard Algebra (A, 4 credits) = 4.0 × 4 = 16.0. Total: 46.5 ÷ 11 = 4.23 weighted GPA.
Use our Weighted GPA Calculator to do the math automatically — it handles honours, AP, and IB course types with the right boost for each.
Common weighted GPA scales
Not all schools use the same weighting system. Here are the most common variants:
| Scale | Standard A | Honours A | AP/IB A | Used by |
|---|---|---|---|---|
| 4.0 (unweighted) | 4.0 | 4.0 | 4.0 | Most colleges, some high schools |
| 5.0 (common) | 4.0 | 4.5 | 5.0 | Most US high schools with AP/IB |
| 6.0 (rare) | 4.0 | 5.0 | 6.0 | Some competitive high schools |
| 100-point weighted | 90–100 | 95–105 | 100–110 | Some schools with percentage system |
If your school uses a different scale, check your course catalog or ask your guidance counsellor. The exact weighting policy should be published in your school's academic handbook.
Does weighted GPA affect class rank?
Yes — and it's one of the biggest debates in US education. Most high schools calculate class rank using weighted GPA. This means students who take more AP/IB courses can rank higher even if they have slightly lower letter grades.
Critics argue this penalises students who can't access advanced courses (for example, at schools with limited AP offerings). Supporters say it's the fairest way to measure academic achievement because it accounts for course difficulty. Many colleges have moved away from relying on class rank for exactly this reason.
How to convert weighted to unweighted GPA
There's no universal conversion formula because each school's weighting system is different. However, the general approach is:
- Remove the weight bonus — look at the actual letter grade for each course
- Use the standard 4.0 scale — A = 4.0, B = 3.0, etc.
- Calculate normally — grade points × credits, divided by total credits
As a rule of thumb, a weighted GPA is typically 0.5–1.0 points higher than the unweighted equivalent for a student taking a mix of honours and AP courses. OurInternational GPA Converter can help you see how different scales compare.
Frequently asked questions
Is a weighted GPA better than an unweighted GPA?+
Neither is strictly better — they measure different things. A weighted GPA shows you've taken challenging courses (honours, AP, IB). An unweighted GPA shows your raw performance on a level playing field. Selective colleges look at both, along with the rigour of your course load.
Do colleges prefer weighted or unweighted GPA?+
Most colleges recalculate your GPA on an unweighted 4.0 scale during admissions to compare applicants fairly. They also review your transcript for course difficulty — a student with a 3.7 unweighted who took 8 AP classes is often more impressive than a 4.0 student who took only standard classes.
What is a good weighted GPA?+
A weighted GPA above 4.0 is common for students taking AP/IB courses. For competitive colleges (top 50), a weighted GPA of 4.2–4.5 is typical. At less selective schools, a weighted GPA of 3.5–4.0 is considered strong. It depends on your school's maximum weighted scale (usually 5.0).
What is a good unweighted GPA?+
A 3.0 (B average) is a solid foundation. A 3.5+ is competitive for many colleges. A 3.7+ (A− average) opens doors to selective schools. A 4.0 (straight As) is the maximum possible. For graduate school, a 3.0+ is usually required and 3.5+ is competitive.
Can a weighted GPA be over 5.0?+
Yes, but it's rare. Some high schools use a 6.0 scale where AP/IB courses get 6.0 for an A. Others use a 100-point weighted scale. The most common weighted system caps at 5.0. Always check your school's specific grading policy.
Do international schools use weighted GPA?+
Weighted GPA is primarily a US high school concept. International schools that offer AP or IB programs may use weighted grading, but most international schools and universities worldwide use unweighted scales or percentage-based systems.
How do I know if my school uses weighted GPA?+
Your school's academic catalog or course guide will specify. If honours, AP, or IB courses are listed with a different point value (e.g., AP Physics = 5.0 max instead of 4.0), you have weighted grading. Your transcript should also indicate whether the GPA is weighted or unweighted.
Does weighted GPA affect class rank?+
Yes, it usually does. Most high schools calculate class rank using weighted GPA, which rewards students who take challenging courses. This is why valedictorians and salutatorians often have weighted GPAs above 4.0.