How is a weighted average calculated?

Multiply every value by its weight, add those products, then divide by the sum of all weights.

Do weights have to add up to 100?

No. Only their relative size matters, provided their total is greater than zero.

Category: Calculators

Calculate a weighted average from value and weight pairs.

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Calculation inputs

Value:weight pairs

Use one pair per line or separate pairs with semicolons.

Result

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Details

Enter each value together with its weight. The calculator shows the weighted sum, the total weight and the final average.

Weights may be percentages, credits, quantities or any other positive scale; they do not need to add up to 100.

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Good to know

How is a weighted average calculated?: Multiply every value by its weight, add those products, then divide by the sum of all weights.
Do weights have to add up to 100?: No. Only their relative size matters, provided their total is greater than zero.