How to calculate GPA
Understanding How to calculate GPA is essential for every student. Your Grade Point Average (GPA) is calculated by dividing total grade points earned by total credit hours attempted. Use our free calculator below to compute your GPA instantly, or read our step-by-step guide.
Your GPA
Enter your courses and grades above to calculate your GPA.
What Is the Formula for How to Calculate GPA?
GPA is calculated by multiplying each course's grade point value by its credit hours to produce quality points, summing all quality points, and dividing the total by the total credit hours attempted on the 4.0 scale.
- Requires three data points per course: grade, credit hours, and grade point value
- Uses the standard 4.0 scale: A=4.0, B=3.0, C=2.0, D=1.0, F=0.0
- Applies equally to unweighted GPA (standard) and weighted GPA (with AP/Honors bonus)
- Produces semester GPA from current-term courses, or cumulative GPA when all terms are included
- The same core formula is used across virtually all US high schools and colleges
The GPA formula uses credit-hour weighting, meaning courses with more credit hours have a greater effect on the final average — this distinguishes GPA from a simple arithmetic mean of letter grades. High school GPA and college GPA use the same 4.0 scale formula, though high schools may also offer a weighted GPA that adds bonus points (+0.5 for Honors, +1.0 for AP or IB) allowing the weighted average to exceed 4.0. Most US colleges request your unweighted GPA for admissions. Semester GPA measures a single term; cumulative GPA is the credit-weighted average of every course taken across your entire academic record. Some institutions use a 4.3 scale where A+ equals 4.3 instead of 4.0 — always confirm which scale your school reports.
How to Calculate GPA: Complete Step-by-Step Method
List every course in the term
Record each course name along with its credit hour value — typically found in the course catalog or registration record.
Convert letter grades to grade points
A=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, F=0.0.
Multiply grade points by credit hours
For each course: grade points × credit hours = quality points. A B in a 3-credit course = 9.0 quality points.
Sum all quality points
Add together the quality points from every course in the term.
Divide by total credit hours
Divide the total quality points by the sum of all credit hours. This quotient is your semester GPA on the 4.0 scale.
Worked Example
Three courses: A (3cr) = 12 pts, B+ (4cr) = 13.2 pts, B- (3cr) = 8.1 pts. Total: 33.3 pts ÷ 10 cr = 3.33 GPA.
Complete Grade Point Value Reference Table
| Letter Grade | Grade Points | Common Percentage |
|---|---|---|
| A+ / A | 4.0 | 93–100% |
| A- | 3.7 | 90–92% |
| B+ | 3.3 | 87–89% |
| B | 3.0 | 83–86% |
| B- | 2.7 | 80–82% |
| C+ | 2.3 | 77–79% |
| C | 2.0 | 73–76% |
| C- | 1.7 | 70–72% |
| D+ | 1.3 | 67–69% |
| D | 1.0 | 63–66% |
| D- | 0.7 | 60–62% |
| F | 0.0 | Below 60% |
Semester GPA vs. Cumulative GPA
Semester GPA only counts courses from one term. Cumulative GPA is the credit-weighted average of all courses across your entire academic history — a single bad semester has diminishing impact as total credit hours grow.
Weighted vs. Unweighted GPA
Unweighted GPA uses the standard 4.0 scale for every course. Weighted GPA adds +0.5 for Honors and +1.0 for AP or IB courses, allowing GPAs above 4.0. Colleges typically compare applicants on the unweighted 4.0 scale.
High School GPA vs. College GPA
Both use the same 4.0 formula. College courses typically carry 3–4 credit hours each, giving individual courses more weight. High schools may report both weighted and unweighted GPA; colleges report only unweighted on official transcripts.
GPA After Retaking a Course
Grade forgiveness policies vary by institution. Some schools replace the original grade in the GPA; others average both attempts. LSAC (law school) and AMCAS (medical school) include all attempts regardless of institutional forgiveness policy.
How to calculate GPA - Step-by-Step Guide
Calculating GPA follows the same straightforward formula used by every high school and college in the United States. Two pieces of information are required for each course: the letter grade (converted to grade points) and the credit hours assigned to that course.
The GPA Formula
GPA = Σ(Grade Points × Credit Hours) ÷ Σ(Credit Hours)
Where Σ means "sum of all courses"
Step-by-Step Calculation
List all courses
Write down each course, its credit hours, and the final letter grade.
Convert grades to grade points
Use the standard 4.0 scale to convert each letter grade to a number.
Multiply grade points by credit hours
For each course, multiply the grade point value by credit hours to get quality points.
Sum quality points and credit hours
Add all quality points and all credit hours separately.
Divide to get GPA
Divide total quality points by total credit hours.
Grade Point Reference
| Grade | GPA Points | Percentage | Description |
|---|---|---|---|
| A+ | 4.0 | 97–100% | Exceptional |
| A | 4.0 | 93–96% | Excellent |
| A− | 3.7 | 90–92% | Near Excellent |
| B+ | 3.3 | 87–89% | Above Average |
| B | 3.0 | 83–86% | Average |
| B− | 2.7 | 80–82% | Below Average |
| C+ | 2.3 | 77–79% | Satisfactory |
| C | 2.0 | 73–76% | Passing |
| C− | 1.7 | 70–72% | Near Passing |
| D+ | 1.3 | 67–69% | Below Passing |
| D | 1.0 | 63–66% | Minimal Pass |
| D− | 0.7 | 60–62% | Poor |
| F | 0.0 | 0–59% | Failing |
Grade point values per the standard US grading scale. Some institutions use A+ = 4.3 or omit plus/minus grades.
GPA Scale Variations by Institution Type
| Purpose | Minimum GPA | Notes |
|---|---|---|
| Standard US Scale | 0.0 – 4.0 | Most US high schools and colleges. A = 4.0, F = 0.0. Plus/minus grades use intermediate values. |
| 4.3 Scale (A+ = 4.3) | 0.0 – 4.3 | Some schools award 4.3 for A+. The denominator in the GPA formula stays the same; only the A+ value changes. |
| Weighted Scale (AP/IB) | 0.0 – 5.0 | AP courses add +1.0, Honors add +0.5 to base grade point values. The scale exceeds 4.0. |
| Pass/Fail Courses | Excluded | P/F courses earn no grade points and are excluded from all GPA calculations. |
| Incomplete (I) Grade | Excluded | Incompletes are temporarily excluded from GPA. The grade converts once coursework is submitted. |
Common Mistakes When Calculating GPA
Calculating a simple average instead of credit-weighted average
Problem: Adding all letter grade point values and dividing by the number of courses treats a 1-credit PE class the same as a 4-credit Chemistry course.
Fix: Multiply each grade point by the course's credit hours first. Divide the sum of quality points by the sum of credit hours - not by the number of courses.
Using wrong point values for plus/minus grades
Problem: Assigning 3.0 to a B+ or 4.0 to an A− produces an inaccurate GPA. Plus/minus grades have specific intermediate values.
Fix: Use: A+ = 4.0, A = 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, F = 0.0.
Including P/F courses in the GPA calculation
Problem: Pass/Fail courses do not carry grade points. Adding them to the numerator or denominator distorts the GPA.
Fix: Exclude P/F courses from the GPA formula entirely. They count toward total credits attempted for financial aid but not for GPA.
Using the wrong scale (4.0 vs. 4.3)
Problem: Calculating on a 4.3 scale when the school uses 4.0 (or vice versa) makes A+ worth 4.3 when it should be 4.0.
Fix: Confirm the institution's specific grading scale before calculating. Most US schools cap at 4.0 even for A+.
Frequently Asked Questions
What is the formula to calculate GPA?
What do the letter grades equal in GPA points?
How do you calculate cumulative GPA?
What is the difference between weighted and unweighted GPA?
How do colleges calculate GPA differently than high schools?
Can you raise your GPA after graduation or mid-semester?
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