Weighted Average Calculator
Calculate a weighted average of two values.
Weighted Average measurements
Enter your values, then calculate.
Result
How to calculate weighted average
This calculator finds a weighted average of two values, each with its own weight — giving values with larger weights more influence on the final result than a simple unweighted average would.
How the calculation works
Weighted average = (Value 1 × Weight 1 + Value 2 × Weight 2) ÷ (Weight 1 + Weight 2).
Example
A value of 80 with weight 3, and a value of 90 with weight 1: (80×3+90×1)÷(3+1) = (240+90)÷4 = 330÷4 = 82.5.
Frequently asked questions
How is Result calculated?
Result = ([First value] × [First weight] + [Second value] × [Second weight]) ÷ ([First weight] + [Second weight]).
Is the Weighted Average Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Weighted Average Calculator
Weighted average = (Value 1 × Weight 1 + Value 2 × Weight 2) ÷ (Weight 1 + Weight 2).
Let's understand your weighted average result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Weighted Average
- This differs from a simple average, which would treat both values equally (giving 85 in the example) — weighting lets you reflect that some values matter more than others.
- Weights don't need to sum to any particular number — the formula normalizes automatically by dividing by the total weight.
Common Weighted Average Mistakes to Avoid
- Using a simple (unweighted) average when the underlying values actually have meaningfully different importance or sample sizes that should be reflected in the calculation.
When to Use This Calculator
This calculator finds a weighted average of two values, each with its own weight — giving values with larger weights more influence on the final result than a simple unweighted average would.