GPA Calculator
Enter your course grades (letters A+ to F or points 0–4) and credit hours to find your semester GPA on the 4.0 scale, with a full course-by-course breakdown.
Calculate Your Semester GPA
GPA Formula
Where:
- \(G_i\) — grade of course \(i\), converted to points on the 4.0 scale (e.g. A = 4.0, B+ = 3.3)
- \(cr_i\) — credit hours (credits) of course \(i\)
- \(n\) — number of courses taken
The formula computes a weighted average: courses with more credit hours count more toward your GPA than lighter ones.
GPA – Calculation Example
Example: a semester with three courses — Calculus II (A, 3 credits), Physics I (B+, 4 credits) and English Composition (A−, 3 credits).
\[ \sum (G_i \times cr_i) = (4.0 \times 3) + (3.3 \times 4) + (3.7 \times 3) = 12 + 13.2 + 11.1 = 36.3 \]
\[ \sum cr_i = 3 + 4 + 3 = 10 \]
\[ \text{GPA} = \frac{36.3}{10} = 3.63 \]
Result: a semester GPA of 3.63 on the 4.0 scale, from 10 credit hours and 36.3 total grade points — roughly an A− average.
How to Use the GPA Calculator
- Enter a Course name (optional) for each class — it only labels the breakdown table.
- In the Grade field, type a letter grade from A+ to F, or the points directly (e.g. 3.7 for an A−).
- Enter the Credit hours for the course — this is its weight in the average.
- A new course slot appears automatically once you fill the previous one; the calculator supports up to 8 courses.
- Read your Semester GPA (4.0 scale), Total credit hours, Total grade points and the course-by-course breakdown in "Your Results".
What Is GPA and How Is It Interpreted?
GPA (Grade Point Average) is the standard summary of academic performance used by U.S. high schools, colleges and universities. Each letter grade is converted to points on the 4.0 scale, and the points are averaged — weighted by credit hours — across all courses taken in a semester or program. The result is a single number between 0.0 and 4.0 that admissions offices, scholarship committees and employers can compare at a glance.
The weighting matters: a 4-credit course contributes twice as many grade points as a 2-credit course, so an A in a heavy course lifts your GPA more than an A in a light one. That is why you cannot simply average the grade points of your courses — the formula must multiply each grade by its credits first.
As a rough guide on the unweighted 4.0 scale: 3.7–4.0 is an A range (excellent), 2.7–3.6 is a B range (good), 1.7–2.6 is a C range (satisfactory), and below 1.7 often falls into academic-probation territory. Typical admission profiles for competitive universities sit around 3.5–4.0, but expectations vary widely by institution and program.
Grade Conversion Table
| Letter grade | Points | Letter grade | Points |
|---|---|---|---|
| A+ / A | 4.0 | C+ | 2.3 |
| A− | 3.7 | C | 2.0 |
| B+ | 3.3 | C− | 1.7 |
| B | 3.0 | D+ | 1.3 |
| B− | 2.7 | D / D− | 1.0 / 0.7 |
| F | 0.0 | ||
Assumptions and Limitations
- The calculator uses the standard unweighted U.S. 4.0 scale shown above. Some schools use slightly different conversions (e.g. A = 4.0 with no A+ step, or an A− = 3.67); if yours differs, type the numeric points directly instead of the letter.
- Weighted grades are not supported. AP, IB, honors and dual-enrollment courses that earn 5.0 for an A on a weighted scale should be entered as their unweighted equivalents, or as numeric points up to 4.0.
- Pass/Fail, audit and credit-by-exam courses carry no grade points and should be left out entirely.
- Courses with a grade but no credits are flagged as errors — every course needs credit hours greater than 0. A typical range is 0.5 to 6 credits.
- This tool computes a semester GPA. To find a cumulative GPA, enter every course from all semesters at once (up to 8 slots), or calculate each semester separately and combine the results manually with the same weighted-average formula.
- The letter standing shown in the breakdown is only approximate; your institution's official transcript is always the authoritative source.
Frequently Asked Questions
How do I calculate my GPA by hand?
Multiply each course's grade points by its credit hours, add those products together, then divide by the total credit hours. For example, an A (4.0) in a 3-credit course and a B (3.0) in a 3-credit course give \((4.0 \times 3) + (3.0 \times 3) = 21\) points over 6 credits, so \( \text{GPA} = 21 \div 6 = 3.50\).
What is a good GPA?
On the 4.0 scale, 3.7 or higher is generally considered excellent, 3.0–3.6 is good, and 2.0 is often the minimum to stay in good academic standing. Competitive universities frequently admit students with 3.5+, but expectations vary widely by school, major and program, so check the specific institution's figures.
How do I convert my percentage grade to GPA points?
There is no universal conversion, but a common mapping is 90–100% = A (4.0), 85–89% = A− (3.7), 80–84% = B+ (3.3), 75–79% = B (3.0), 70–74% = B− (2.7), and so on, with anything below 60% usually an F. Your school's grading policy is the authoritative source, since cutoffs differ.
How is a cumulative GPA different from a semester GPA?
A semester GPA covers only one term's courses; a cumulative GPA spans your entire academic record. To compute it, use all courses from every semester in the same weighted formula: total grade points across all terms divided by total credit hours. You cannot average semester GPAs directly — each must be weighted by its credits.
Do pass/fail, withdrawn or repeated courses count toward GPA?
Pass/Fail and audited courses carry no grade points, so leave them out. A withdrawn (W) course typically does not affect GPA. Repeated courses are handled differently by each school: many replace the old grade, others average both attempts — check your registrar's policy before counting them.
How do I convert my GPA to a percentage or a different scale?
There is no exact conversion because letter-grade cutoffs vary. A rough approximation is percentage = GPA × 20 + 20 (so 3.0 ≈ 80%), but it is only an estimate. For other scales, the common approach is percentage-based: a 4.0 GPA maps to about 85–100%, depending on the country's grading conventions.
Why is my GPA different from what I calculated by simply averaging my grades?
Because GPA is a credit-weighted average, not a simple average. A 4-credit course counts twice as much as a 2-credit course, so you must multiply each grade's points by its credits before summing. Simply averaging grade points gives the correct answer only when every course has identical credit hours.
Really useful GPA calculator! I especially like how you've explained the credit-hour weighting, since many students assume GPA is just a simple average of their grades. The course-by-course breakdown makes the calculation much easier to understand. One helpful addition could be an option to calculate how much GPA a student needs next semester to reach a specific academic goal. That would make this tool even more valuable for students planning ahead.