What this tool is for
Weighted Average Calculator supports math checking in math calculators by showing how apply the formula shown on this page to the entered values. The page keeps the inputs, formula, and example together so the calculation can be checked before the number is reused.
When to use it
Use it when value 1, weight 1, and value 2 are already known and you need a quick estimate before comparing options, checking a worksheet, or copying the result into another workflow.
Inputs
- Value 1 is one of the direct inputs used to calculate weighted average.
- Weight 1 is one of the direct inputs used to calculate weighted average. Use % for this field.
- Value 2 is one of the direct inputs used to calculate weighted average.
- Weight 2 is one of the direct inputs used to calculate weighted average. Use % for this field.
- Value 3 is one of the direct inputs used to calculate weighted average.
- Weight 3 is one of the direct inputs used to calculate weighted average. Use % for this field.
Formula
weighted average = sum(value x weight) / sum(weights)
Example
85 at 40%, 90 at 35%, 70 at 25% gives 82.75.
What the result means
The result labeled "Weighted average" is the direct output of weighted average = sum(value x weight) / sum(weights). In the worked example, 85 at 40%, 90 at 35%, 70 at 25% gives 82.75.
Before you rely on the result
Check the inputs and formula before using the result in homework, engineering, finance, or scientific work.
Next useful tools
- Math Calculators
- Average Calculator
- Standard Deviation Calculator
- Percent Error Calculator
- Exponent Calculator
Frequently asked questions
What does Weighted Average Calculator calculate?
Weighted Average Calculator uses weighted average = sum(value x weight) / sum(weights) to calculate weighted average from value 1, weight 1, and value 2.
Can I use this result as a final decision?
Weighted Average Calculator is meant for fast planning math. Confirm taxes, contracts, school rules, medical guidance, building codes, or financial advice with the right source when the result affects a real decision.