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Weighted Grade Average Calculator

In a weighted average, not every test counts equally: an exam might weigh twice as much as a quiz. Enter the grades and their weights to find the true average.

Result

7.25

Weighted average

How this was calculated
  1. 1Multiply each grade by its weight and sum7ร—1 + 8ร—2 + 6ร—1 = 29
  2. 2Divide by the total weightรท 4 = 7.25

Formula

Average = ฮฃ(grade ร— weight) รท ฮฃ(weight)

You multiply each grade by its weight, add those results, and divide by the sum of all weights. A plain (unweighted) average is the same as when every weight equals 1.

Worked examples

Grade 7 (weight 1), grade 8 (weight 2), grade 6 (weight 1)

โ†’ Weighted average = 7.25.

Common mistakes

  • Treating weights as percentages that must sum to 100, while relative weights (like 1, 2, 1) work just as well.

When to use it

  • Determining your interim average before the last grade is in.

Frequently asked questions

What if I have fewer than 4 grades?

Set the weight of unused grades to 0; they will be ignored.

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