Grade Calculator
Calculate your final weighted grade percentage and letter grade from assignment, midterm, and final exam scores and their respective weights.
- Free to use
- Accurate results
- No registration required
- Works on all devices
This calculator finds your weighted average grade and letter grade from your assignment, midterm, and final exam scores and their weights.
Your result
85.40%
Weighted average
Letter gradeB
AI explanation
Formula
Weighted average = Σ(score × weight) ÷ Σ(weight)Worked example
Assignment 85% (20%), Midterm 78% (30%), Final 90% (50%)
| Field | Value |
|---|---|
| Assignment score (%) | 85 |
| Assignment weight (%) | 20 |
| Midterm score (%) | 78 |
| Midterm weight (%) | 30 |
| Final exam score (%) | 90 |
| Final exam weight (%) | 50 |
| Weighted average | 85.4 |
| Letter grade | B |
Assumptions
- Weights are normalized automatically, so they do not need to sum to exactly 100.
- Letter grade uses a common absolute scale (A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, otherwise F) — actual grading scales vary by institution and course.
Frequently asked questions
Do my weights need to add up to 100%?
No — this calculator normalizes by dividing the weighted sum by the total weight, so weights like 1:1:1 work the same as 33.3:33.3:33.3.
What if I only have two components, like a midterm and final?
Set the assignment weight to 0 — a zero-weight component doesn't affect the result, as long as at least one component has a positive weight.
Does the letter grade scale match my school's grading policy?
This calculator uses a common absolute scale (90/80/70/60 cutoffs), but many institutions use different cutoffs or a curve — check your syllabus for your course's actual grading scale.