How to use it
- Enter each grade as a percentage.
- Enter its weight. Weights can be percentages (40) or any relative numbers (2 for double weight).
- The weighted average updates as you type.
The formula
Weighted average = Σ (grade × weight) ÷ Σ weights
Good to know
- Weights don't have to sum to 100 — the calculator normalises them.
- A simple average treats every grade equally; use the average grade calculator for that.
Questions
What's the difference between a weighted and a simple average?
A simple average adds the grades and divides by how many there are. A weighted average multiplies each grade by its weight first, so a test worth 40% counts four times as much as a quiz worth 10%.
Can I use points as weights?
Yes. If a test is 100 points and a quiz 20 points, enter 100 and 20 as the weights.