How the weighted average works
In a weighted average, each assessment has a "weight" — its relative importance in the final grade. The formula is: Average = Σ(grade × weight) ÷ Σ(weight). An exam with weight 3 counts three times as much as one with weight 1.
How to use normal mode
Enter one assessment per line, formatted as grade:weight. Example: 8:2 (grade 8, weight 2) followed by 6:1 (grade 6, weight 1) gives an average of (8×2 + 6×1) ÷ (2+1) = 7.33.
Reverse mode: "what do I need on the final exam?"
Enter your current average (before the final exam), the final exam's weight (in %) and the minimum passing grade. The calculator solves for the minimum score you need on the final.
Worked example
Current average: 5.5. Final exam is worth 40% of the grade. Minimum passing grade: 6.0. Grade needed on the final ≈ 6.75.
Frequently asked questions
What is a weight in an assessment?
It's the relative importance of that grade in the final average — higher weights count more.
How do I use "what do I need on the final exam"?
Enter your current average, the weight (%) of the final exam and the minimum passing grade; the calculator solves the equation for you.
What if the required grade is above 10?
The calculator tells you it's not mathematically possible to reach the minimum average with that exam weight.
Can I use a comma in the grades?
Yes, both comma and period are accepted as decimal separators.