GPA Calculator
Introduction
Grade Point Average is how high schools, colleges, and universities compare grades across classes of different sizes. The GPA calculator converts each course's letter grade and credit hours into a cumulative number on the standard 4.0 scale — the figure that appears on transcripts, scholarship applications, and admissions files.
| Course | Letter grade | Credits | Actions |
|---|---|---|---|
Cumulative GPA (10 credits)
3.63
How it works
Each letter grade maps to a point value: A = 4.0, A− = 3.7, B+ = 3.3, B = 3.0, and so on. Multiply each course's points by its credit hours, sum the products, and divide by total credits. Bigger classes (more credit hours) pull the average more, which is why a four-credit lab affects GPA more than a one-credit elective.
The formula
GPA = Σ (grade points × credits) ÷ Σ credits
Step-by-step instructions
- Open your transcript or registration record and list every course to include.
- Note each course's letter grade and credit hours.
- Enter each course into the calculator with its grade and credits.
- For a semester GPA, include only that semester. For cumulative GPA, include every graded course.
- Read the GPA and confirm it matches the transcript. If not, check for pass/fail courses that should be excluded.
Real examples
- High-school semester. English A (1 credit) → 4.0 × 1 = 4.0. Math B+ (1) → 3.3. History A− (1) → 3.7. Biology B (1) → 3.0. PE A (0.5) → 4.0 × 0.5 = 2.0. Total = 16.0 ÷ 4.5 = 3.56 GPA.
- College term. Calculus A (4 credits) → 16.0. English B+ (3) → 9.9. History A− (3) → 11.1. Chemistry B (4) → 12.0. Total = 49.0 ÷ 14 = 3.50 GPA.
- Weighted high-school GPA. Add 1.0 to honors and AP classes. AP Bio A (1 credit) becomes 5.0 × 1 = 5.0 in the weighted formula, while regular English stays on the 4.0 track.
Weighted vs unweighted GPA
High schools often publish a weighted GPA that adds bonus points to honors, AP, or IB classes — usually a maximum of 5.0 instead of 4.0. Colleges frequently recalculate to unweighted, so both numbers are worth knowing. See our grading scales guide for the full picture.
Teacher tips
- When counseling students about class selection, model both weighted and unweighted GPA — the trade-off between a rigorous schedule and a clean transcript becomes obvious.
- Show the formula in a study-skills lesson; students understand why one dropped grade hurts more than they expected once they see the credit multiplier.
- Encourage seniors to run their transcript through the calculator before final grades, so surprises never come from the registrar.
Student tips
- Track GPA semester by semester, not just cumulatively — a bad term becomes obvious sooner.
- Use credit hours from your official transcript, not estimated class time.
- Repeat courses: know your school's policy (average vs replace) before assuming the calculator matches the transcript.
- If you're on the border between two GPA tiers, focus on high-credit classes first — they move the average most.
Frequently asked questions
What is a GPA?
Grade Point Average converts letter grades into numbers on a common scale — usually 4.0 in the United States — so grades from different classes, credit loads, and semesters can be compared with a single figure.
What's a good GPA?
Context matters. A 3.5 unweighted is strong at any high school and competitive for most colleges; a 3.0 is solid; below 2.0 typically triggers academic probation. Selective universities and honors programs often look for 3.7 and above.
Weighted vs unweighted GPA — which do colleges use?
Most colleges recalculate applicants' GPAs on an unweighted 4.0 scale using their own formula, so both numbers matter. Report whichever your school publishes, but know the unweighted version too.
Do pass/fail courses count?
Usually no. Pass/fail and audit courses appear on the transcript but don't factor into GPA. Leave them out of the calculator.
How are retaken courses handled?
Policies vary. Some schools average the two attempts, others replace the original grade with the new one. Check the registrar's rule before using this calculator on retakes.
GPA Calculation Example
Suppose a student takes three courses:
| Course | Grade Points | Credits |
|---|---|---|
| Mathematics | 4.0 | 3 |
| English | 3.0 | 3 |
| Science | 3.7 | 4 |
A credit-weighted GPA gives greater influence to courses carrying more credit hours. The exact GPA calculation method can differ between schools, so users should check their institution's grading policy. A full walkthrough is in our GPA guide.
GPA vs. Percentage Grade
GPA and percentage grades are not interchangeable in every educational system. A percentage represents performance against a scoring scale, while GPA generally represents grade points assigned to courses. There is no single percentage-to-GPA conversion that is official for every school.
Common GPA mistakes
- Averaging grade points and ignoring credits. A 4.0 in a 1-credit elective does not offset a 2.0 in a 4-credit science course. Multiply every grade point by its credit hours first.
- Using a weighted scale by accident. If your school adds 0.5 for honors or 1.0 for AP, an A in AP Biology is a 5.0 on the weighted scale but still a 4.0 unweighted. Colleges often recalculate, so know which number you are quoting.
- Including pass/fail or transfer credits. Many schools count those credits toward graduation but exclude them from GPA, which changes the denominator.
- Mixing plus/minus values. Some schools score A− as 3.7, others 3.67, and a few give no minus grades at all.
- Rounding each term before combining. Round only the final cumulative figure, and only to the precision your school publishes.
Limitations of this calculator
This tool uses the standard credit-weighted 4.0 formula with the grade point values you enter. It does not know your institution's rules for repeated courses (replace vs. average both attempts), academic forgiveness, withdrawals, incompletes, plus/minus values, honors weighting caps, or the 4.3 scale some schools use for an A+. It also cannot convert a percentage into a GPA, because no such conversion is official everywhere. Treat the result as a close estimate and confirm against your official transcript. The reasoning behind each step is in how to calculate GPA.
Related calculators
- Easy Grader — instant percentage and letter grade from wrong answers.
- Weighted Grade Calculator — combine category weights inside one course.
- Final Grade Calculator — find the exam score you need.
- Letter Grade Calculator — convert a percentage into a letter grade.
- Grading Scale Chart — full percentage, letter, and GPA reference.