Choosing pass/fail for a course is a small decision with a real GPA effect. This calculator shows side by side what your cumulative GPA becomes if you take a class for a letter grade versus pass/fail, so you can protect your average or boost it on purpose.
How the GPA calculation works
Cumulative GPA is the weighted average of grade points across all graded credit hours:
new GPA (letter grade) = (current GPA × current credits + course credits × grade points)
/ (current credits + course credits)Under pass/fail, a passing grade earns the credits but contributes zero grade points and is excluded from the graded denominator entirely. Your numeric average is mathematically unchanged:
pass/fail GPA = current GPA (unchanged; credits earned but not graded)The decision rule follows directly: if your expected letter grade converts to a grade-point value above your current GPA, the letter-grade route raises your average — take the grade. If it is below, pass/fail protects you. If it equals your current GPA exactly, neither option changes it.
Standard US letter grade to GPA points
| Grade | Points | Grade | Points |
|---|---|---|---|
| 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 | 1.0 |
| — | — | F | 0.0 |
Not all schools use plus/minus grades. If your institution uses a simpler scale (A=4, B=3, C=2, D=1, F=0), use those values.
Decision examples
Scenario 1: GPA = 3.6 over 60 credits, expecting a C (2.0) in a 3-credit course.
- Letter grade: (3.6 × 60 + 2.0 × 3) / 63 = (216 + 6) / 63 = 3.52 — drops by 0.08 points
- Pass/fail: GPA stays at 3.60
- Decision: take pass/fail
Scenario 2: GPA = 3.2 over 60 credits, expecting an A (4.0) in a 3-credit course.
- Letter grade: (3.2 × 60 + 4.0 × 3) / 63 = (192 + 12) / 63 ≈ 3.24 — rises by 0.04 points
- Pass/fail: GPA stays at 3.20
- Decision: take the letter grade
Scenario 3: GPA = 3.5 over 30 credits (early in degree), expecting a B (3.0) in a 4-credit course.
- Letter grade: (3.5 × 30 + 3.0 × 4) / 34 = (105 + 12) / 34 ≈ 3.44 — drops by 0.06 points
- Pass/fail: GPA stays at 3.50
- Note: the GPA movement is larger early in a degree when fewer total credits exist to dilute the new course.
Policy caveats to check at your institution
- Caps on pass/fail courses: many schools limit how many credits can be taken pass/fail (often 4–12 credits over a degree, or a maximum per semester).
- Major and core requirements: departments often prohibit pass/fail grading for required courses within a major, even if the university allows it as a general option.
- Failing under pass/fail: at many schools an F under pass/fail counts as zero grade points and does lower the GPA, just like a regular F. A few schools exclude the F grade entirely. Check your academic regulations carefully.
- Graduate and professional school applications: admissions committees for medical, law, and some graduate programmes may note a high proportion of pass/fail courses and request explanation, particularly if they fall within the applicant’s major.
All calculations run locally in your browser.