See how pass/fail courses affect GPA.
A pass/fail course earns credit but carries no grade points, so it is excluded from the GPA divisor entirely — your GPA after a pass is mathematically identical to your GPA before it. What changes is the counterfactual: had the course been graded, its grade points would have moved the average. This calculator shows both numbers side by side so the real trade-off is visible. A positive difference means the pass/fail election cost you GPA; a negative one means it protected you.
Pass/fail effect on GPA
GPA with pass/fail = graded points / graded credits; GPA if graded = (graded points + expected point x P/F credits) / (graded credits + P/F credits)
No. A pass carries no grade points and is left out of the divisor, so the GPA is unchanged. Only a fail is treated as 0.0 in most schemes, and that does pull the average down.
When the difference figure here is positive and large — that is the GPA you would have lost by taking the course for a grade. If the difference is negative, the course would have raised your GPA and electing pass/fail costs you.
Many recompute GPA under their own rules and some treat an unexplained pass as a C. Check the specific programme's policy before electing pass/fail in a prerequisite course.