What does this tool do?
A weighted average gives larger influences to values with larger weights. Enter two components, their values and their weights; the calculator normalises the weights and also shows the unweighted mean for comparison.
The Formula
Weighted average = (Value 1 × Weight 1 + Value 2 × Weight 2) ÷ (Weight 1 + Weight 2)Frequently Asked Questions
Do the weights have to add up to 100?
No. The calculator divides by the total weight, so 2 and 3 behave the same as 40 and 60. Percentages are convenient but not required.
How do I include more than two components?
Combine two components at a time, or add their weighted totals first and divide by the combined weight. This version is designed for a quick two-part comparison.