Grade Calculator
Convert scores to percentages and letter grades, and mix weighted assignments.
How to use this tool
- Enter each score and its total (and optional weight).
- See per-assignment percentages and the weighted final.
- Check the letter grade on the displayed scale.
How it works
Each row: score/total x 100. Weighted final = sum(percentage x weight/100); unweighted = mean of percentages. Letter grade maps from a standard scale.
Tips
- Weighted mode is essential when the syllabus mixes heavy categories.
- Test 'what score do I need on the final' by editing its placeholder.
Limitations
Letter boundaries follow a common North American scale; adjust expectations for other grading systems.
Frequently asked questions
How is percentage computed from a score?
Score / total x 100. A 42/50 is 84%.
How do weighted grades work?
Each assignment's percentage is multiplied by its weight; the final is the sum of those weighted contributions.
What letter does 90% get?
In the common scale, A (the calculator uses A/A-/A+= 90/80/70 with a gentle curve you can review).