Course Retake GPA Calculator
Find out exactly how much retaking a course will raise your GPA — under both grade replacement and grade averaging policies.
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How Does Retaking a Course Affect Your GPA?
When you retake a course, its impact on your GPA is entirely dictated by your university's official retake policy. The two primary policies used by universities are Grade Replacement (or Grade Forgiveness) and Grade Averaging. Because most students do not know which policy their school uses, our calculator displays both scenarios side-by-side so you can see your best and worst-case outcomes.
Grade Replacement vs Grade Averaging — What's the Difference?
Grade Replacement (Forgiveness): This is the most student-friendly policy. When you retake a course, your new grade completely replaces the old grade in your GPA calculation. While the original grade (e.g., a 'D' or 'F') will still physically appear on your academic transcript, its quality points are erased from your cumulative GPA. This results in massive GPA jumps, especially if you replace a failing grade with an 'A'.
Grade Averaging: This is a stricter policy often used by top-tier universities. If you retake a course, both the old grade and the new grade are calculated into your GPA. Effectively, the course now counts for double the credits (e.g., a 3-credit course becomes 6 credits of impact). If you got an 'F' the first time and an 'A' the second time, the two grades average out to a 'C'.
Is It Worth Retaking a Course to Raise Your GPA?
Retaking a course is a significant investment of time (usually 45–90 hours of study over a semester) and money (tuition). It is mathematically "worth it" under specific conditions:
- Your school uses Grade Replacement, NOT Grade Averaging.
- You originally received a D or an F (replacing a 0.0 with a 4.0 is a huge swing).
- You are early in your college career (e.g., under 60 credits). GPA moves much faster when you have fewer total credits dragging it down.
- The course is a strict prerequisite for your major, and you must pass it to continue.
However, if you received a 'C' and want to retake it for an 'A', the time investment is rarely worth it. You would see a larger GPA boost by simply taking a brand-new, easier elective course and securing an 'A' in that. Our calculator includes an "ROI Analysis" section to show you exactly how many GPA points you gain per hour of study compared to taking a new course.
How Many Credits Do You Need to Retake to Significantly Raise Your GPA?
Because your cumulative GPA is an average of all your courses, the impact of a single retake diminishes as you progress towards graduation. If you have 100 credits completed, retaking a single 3-credit course will barely move your GPA (often by less than 0.05 points), even under grade replacement. If you are a senior trying to push your GPA over a 3.0 threshold for grad school, you may need to retake 3 or 4 courses to move the needle.
Frequently Asked Questions
It depends on your school's policy. Under grade replacement (used by most US universities), the new grade replaces the old grade in GPA calculations — the original still appears on your transcript but doesn't count toward GPA. Under grade averaging, both grades are included and your credit hours double. Always check your school's academic catalog for their specific policy before deciding to retake.
The GPA boost from retaking depends on three factors: the grade you're replacing, the grade you expect to earn, and how many total credits you've completed. With a D (1.0) replaced by an A (4.0) in a 3-credit course, after completing 60 credits your GPA rises by approximately +0.15 points. The earlier in your degree you retake, the larger the impact.
Retaking is most worth it when: (1) your school uses grade replacement, (2) you originally earned D or F, (3) you've completed fewer than 90 credits, and (4) the course is in your major. For minor GPA differences (C to B), the time investment may give less GPA gain than taking a new course where you can earn an A.
Yes, completely free with no account required. The calculator shows your new GPA under both grade replacement and grade averaging policies simultaneously. All calculations are instant and run locally in your browser.
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