Skip to content
2x2xKit

Weighted Average Calculator

Calculate a weighted average from a list of values and their weights.

How this is calculated
Weighted average = Σ(value × weight) ÷ Σ(weight)

Assumptions used in this calculation

  • Weight normalization: Weights are automatically normalized by dividing by their sum, so they don't need to add up to 1 or 100% beforehand.

About this calculator

Calculates a weighted average from any list of value:weight pairs, weights don't need to sum to 1, since they're normalized automatically.

Worked example

80 (weight 0.3), 90 (weight 0.5), 70 (weight 0.2)

Result: Weighted average = 83

Was this helpful?

Frequently asked questions