How to Calculate GPA (Grade Point Average) Step by Step
Short answer
GPA = sum of (grade points × credit hours) ÷ total credit hours. On a 4.0 scale, A = 4.0, B = 3.0, C = 2.0. Three credits of A and three of B → (12 + 9) ÷ 6 = 3.5.
Grade point average summarises your transcript in one number. Schools differ on plus/minus scales, but the weighted-average method is the same. Check your work with the GPA calculator.
Unweighted 4.0 scale (common in the US)
| Letter | Points |
|---|---|
| A | 4.0 |
| B | 3.0 |
| C | 2.0 |
| D | 1.0 |
| F | 0.0 |
Step-by-step
- List each course’s letter grade and credit hours.
- Convert letters to points.
- Multiply points × credits for each course (quality points).
- Add quality points; divide by total credits.
Worked example
Biology A (4 credits), History B (3 credits), Math B (3 credits), Elective A (2 credits).
Quality points: 16 + 9 + 9 + 8 = 42. Credits: 12. GPA = 42 ÷ 12 = 3.50.
Weighted GPA
Honors or AP courses may add 0.5 or 1.0 to the points before multiplying. Always use your school’s published scale. For AP exam dates and scoring, see the AP exam schedule 2027 guide.
CGPA to percentage
Some universities report CGPA on a 10-point scale. Conversion rules vary by institution — try the CGPA to percentage calculator and confirm against your registrar’s formula. Percentages alone are covered in the percentage calculator.
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More worked numbers
Change one input at a time so you build intuition. Write the formula, substitute values, then confirm with the free gpa calculator. If the tool disagrees with your hand math, check units first (months vs years, percent vs decimal, inclusive ranges).
Common mistakes to avoid
- Mixing up percent and decimal forms (15% is 0.15, not 15).
- Using the wrong base when calculating a change or a reverse percentage.
- Ignoring fees, tax or daylight saving when the real-world total depends on them.
- Rounding too early in multi-step arithmetic.
How to practise
Invent three mini-problems from your own life — a bill, a grade, a trip, a loan quote — and solve them on paper before you open the calculator. Teaching the steps to someone else is one of the fastest ways to lock in the method.
Related tools on ViralScopeHub
After you finish this guide, explore the linked tools above and the related articles for neighbouring skills. Our calculators run privately in your browser with no sign-up, so you can check homework, budgets or work estimates without uploading data.
Quick reference card
Keep the short answer box at the top of this page as your cheat sheet. When a search result brought you here for a specific phrase, that box is designed to match the query with the formula first, then the examples below fill in the judgement calls.
Frequently asked questions
How is GPA calculated?
Multiply each course’s grade points by its credits, add those products, and divide by total credits. Double-check units and confirm with the linked tool on this page before you rely on the figure for money or school decisions.
What is a good GPA?
Context matters. Many US programs treat 3.0+ as solid; competitive majors and graduate schools often expect higher. Double-check units and confirm with the linked tool on this page before you rely on the figure for money or school decisions.
What is weighted vs unweighted GPA?
Unweighted uses a flat 4.0 scale. Weighted gives extra points for harder courses. Double-check units and confirm with the linked tool on this page before you rely on the figure for money or school decisions.
Can I convert GPA to a percentage?
Only with your school’s official mapping. There is no universal formula. Double-check units and confirm with the linked tool on this page before you rely on the figure for money or school decisions.