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Weighted average calculator

Enter each grade and how much it counts. You see the weighted average and the simple one next to it.

It works for school or university grades, and for any average where some values count more than others.

How it's calculated

Simple average = sum of the values ÷ number of values.
Weighted average = sum of (value × weight) ÷ sum of the weights.
The weights don't need to add up to 100: the sum divides by their total.

An example

With a 7 worth 20%, an 8 worth 30% and a 9 worth 50%, the weighted average is 8.3.

The simple average of those three grades is 8.0: the 9 counts more and pulls the weighted one up.

Frequently asked questions

How do I calculate a weighted average?

Multiply each value by its weight, add them up and divide by the sum of the weights.

What if the weights don't add up to 100%?

That's fine. If one course has 6 credits and another 4, use 6 and 4. The sum divides by the total weight.

What is the difference between a simple and a weighted average?

In a simple average every value counts the same. In a weighted average each one counts by its weight.

Key terms

Weight: How much a value counts towards the final average.
Weighted average: An average where each value is multiplied by its weight.

The same calculation in other countries

Up-to-date official data

We check the official sources automatically, every day.

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