Reverse Weighted Average Calculator
Reverse Weighted Average Calculator: calculate missing value with consistent units and explicit assumptions.
Inputs
units
units
units
units
Results
- Missing value
- 18.333333 units
Formula
Missing value = [target × total weight − known weighted sum] / missing weight
Missing weight = known weight × (target−known value)/(missing value−target)
Assumptions & limits
- Known group is summarized by its own weighted average and total weight.
Worked example
For the example inputs: Missing value = 18.33333 units.
Missing value = [target × total weight − known weighted sum] / missing weight