📝 Weighted Grade Average Calculator
In a weighted average, not every test counts equally: an exam might weigh twice as much as a quiz. Enter up to four grades with their weights and see the true average instantly, including the calculation steps.
Weighted average
7.25
Multiply each grade by its weight and sum: 7×1 + 8×2 + 6×1 = 29
Divide by the total weight: ÷ 4 = 7.25
Formula
Average = Σ(grade × weight) ÷ Σ(weight)
You multiply each grade by its weight, add up those results, and divide the sum by the total weight. A plain (unweighted) average is really just a special case where every weight equals 1. Grades with weight 0 are excluded, so you can also use the calculator with fewer than four grades.
Steps
- 1Enter the grade and its corresponding weight for each test (for example 1, 2 or 3 depending on importance).
- 2Leave unused rows at weight 0; they are automatically ignored.
- 3Read off the weighted average, along with the intermediate calculation steps.
Common weighting schemes
| Component | Typical weight | Note |
|---|---|---|
| Quiz | 1 | Lowest weight, usually counts only lightly |
| Homework | 1–2 | Regular, but usually not decisive |
| Midterm test | 2–3 | Weighs more than individual assignments |
| Final exam | 3–5 | Usually determines the largest part of the final grade |
Guideline values; your teacher or institution sets the exact weighting.
commonMistakes
- Treating weights as percentages that must sum to 100, while relative weights (like 1, 2, 1) work just as well.
- Taking a plain average of grades that should actually carry different weights.
- Leaving an unused grade field at its default value with a weight above 0, which skews the average.
useCases
- Determining your interim average before the last grade is in.
- Checking whether you're on track to pass across differently weighted tests and exams.
- Comparing different course syllabi with their own weighting schemes.