Weighted Average Calculator
Calculate weighted average instantly in your browser.
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What this tool does
Calculate weighted average instantly in your browser. Nonnegative weights normalized to their sum.
How to use the Weighted Average Calculator
- Enter or select value, weight (one pair per line).
- Read the calculated result; change any measurement to compare alternatives.
Formula
weighted mean=sum(value×weight)/sum(weights)
- values
- Value, weight (one pair per line)
Nonnegative weights normalized to their sum.
Worked example
For weighted average calculator, the following measurements illustrate the exact method: Value, weight (one pair per line): 10,1 20,2 30,1.
Inputs
- Value, weight (one pair per line)10,1 20,2 30,1
Result
- Weighted average20
Results explained
- Weighted average
- Weighted average from the formula above. Nonnegative weights normalized to their sum.
Frequently asked questions
weighted mean=sum(value×weight)/sum(weights)
Nonnegative weights normalized to their sum.
Where mathematically meaningful, yes. Fields specify permitted ranges and undefined operations display an error.
Exact integer calculations use safe integers; decimal calculations use browser floating point, so small rounding differences can occur.
All values remain in your browser and are never uploaded.