About the High School GPA Calculator
High schools and college admissions offices usually look at two GPAs: an unweighted GPA on the plain 4.0 scale and a weighted GPA that gives extra points for harder classes. This calculator does both. Add each class with its letter grade, level (regular, honors, or AP / IB / dual enrollment) and credits, and it works out both GPAs as you type. Honors classes get an extra 0.5 points and AP, IB and college classes get an extra point, which is the most common system in US schools.
Updated October 2026
How to use the High School GPA Calculator
- 1Enter each class, its letter grade and its level.
- 2Set the credits; most full-year classes are 1, semester classes 0.5.
- 3Add more classes with Add class.
- 4Read your weighted and unweighted GPA.
- 5Compare with your school's handbook if it uses a different scale.
How the two GPAs are calculated
Each letter grade becomes grade points. For the unweighted GPA, the points are multiplied by each class's credits, added up and divided by the total credits. For the weighted GPA, honors classes get 0.5 extra points and AP, IB and dual-enrollment classes get 1 extra point before the same averaging.
A quick example
Four one-credit classes show how much weighting can lift a GPA.
- A in AP Chemistry: 4.0 unweighted, 5.0 weighted
- B in Honors English: 3.0 unweighted, 3.5 weighted
- A− in Algebra II: 3.7 both ways
- B+ in US History: 3.3 both ways
- Unweighted 3.50, weighted 3.88
Credits matter
A semester class usually counts half as much as a full-year class, so give it 0.5 credits. Labs, electives and physical education can also carry different credits; your transcript lists them. Getting the credits right can move your GPA by a tenth or more.
Raising your GPA
Grades in classes with more credits move the average most. Because every past grade stays in a cumulative GPA, early years matter as much as senior year. Taking honors or AP classes raises the weighted GPA only if you keep your grades up, so choose a balance you can manage.
Weighted GPA caps and other systems
Some schools cap weighted GPAs at 5.0, give honors only 0.25 extra, or weight only grades of C and above. Others use a 100-point scale or report class rank instead. If your transcript shows a different number, your school's rules are the reason; use this tool to plan and compare, and quote the official figure on applications.
Phone and computer
Each class sits in its own box that stacks neatly on a phone. Your GPA updates with every change. For college marks use the GPA Calculator, and for what you need on the final the Final Grade Calculator.
Features
- Weighted and unweighted GPA
- Honors +0.5, AP / IB / college +1
- Credits for semester and year classes
- Plus and minus grades
- Add or remove classes freely
- Nothing is uploaded
Frequently asked questions
What is the difference between weighted and unweighted GPA?
Unweighted GPA counts every A as 4.0, whatever the class. Weighted GPA adds a bonus for harder classes, so an A in AP Biology can count as 5.0.
How do I calculate a weighted GPA?
Add the bonus to each class's grade points (0.5 for honors, 1 for AP or IB), multiply by the credits, add everything up and divide by the total credits.
What grade points does each letter get?
A+ and A are 4.0, A− 3.7, B+ 3.3, B 3.0, B− 2.7, C+ 2.3, C 2.0, C− 1.7, D+ 1.3, D 1.0, D− 0.7 and F 0.
Do colleges use weighted or unweighted GPA?
Many recalculate GPA their own way, often unweighted for core subjects, while also looking at how challenging your schedule was. Report the GPA your school puts on your transcript.
Does an F in an AP class get a bonus?
In most schools no; failing grades get no weighting. The calculator follows that rule.
My school uses a 5.0 or 100-point scale. Can I use this?
The calculator uses the common 4.0 base with bonuses. If your school uses another scale, use our Letter Grade Converter or check the handbook.