Quick brief
What to know before you calculate
A short read on the assumptions, trade-offs and definitions that shape the answer.
- A higher-credit course affects GPA more than a lower-credit course.
- Weighted average logic is the core of many grade calculations.
- Institution rules can change how repeats, pass or fail modules and honours weighting are counted.
Why credits matter
GPA is not usually a simple average of course grades. Each grade is multiplied by the course credits, then the total grade points are divided by total credits. A four-credit course therefore has more influence than a one-credit course.
How the weighted average works
The same idea appears in many academic calculations. Multiply each result by its weight, add the weighted results, then divide by total weight. Credits, module weightings and assessment percentages are all common weights.
Check the grading scale
A 4.0 scale is common, but not universal. Some institutions use plus and minus grades differently, add honours weighting, cap repeated modules or exclude pass or fail credits. Always compare the calculator with your institution's policy before relying on the result.
Use scenarios for planning
To plan a target GPA, change the grades for future courses and see how the weighted result moves. This is most useful when you also know the credits remaining, since a small number of future credits may not move the final average very far.
Related calculators
Try the numbers yourself
Open the calculators that match this topic and test the result with your own inputs.