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A weighted average lets some values count more than others — like a final grade where the exam matters more than a homework assignment, or a portfolio where a bigger holding matters more than a smaller one.
This calculator finds the weighted average from up to 5 value-weight pairs.
How it works
Enter each value along with its weight (the weights don't need to add up to 1 or 100 — the calculator normalizes automatically). It multiplies each value by its weight, sums the results, and divides by the total weight.
- Enter value 1.
- Enter weight 1.
- Enter value 2.
- Enter weight 2.
- Enter value 3 (optional).
- Enter weight 3 (optional).
- Enter value 4 (optional).
- Enter weight 4 (optional).
- Enter value 5 (optional).
- Enter weight 5 (optional).
- Click Calculate to see your results.
Examples
90 (weight 0.3), 80 (weight 0.7)
A value of 90 weighted at 0.3 and a value of 80 weighted at 0.7 produces a weighted average of 83 — closer to 80 since it carries more weight.
Who should use it
- Calculating a final grade where different assignments carry different weights.
- Finding a portfolio's weighted average return based on position sizes.
Industry applications
- Education and grading
- Finance and portfolio analysis
Advantages
- Handles up to 5 value-weight pairs in one calculation.
- Automatically normalizes weights of any scale.
Limitations
- Limited to 5 pairs — larger datasets need a spreadsheet.
Common mistakes to avoid
- Mixing up which number is the value and which is the weight for a given pair.
- Entering all weights as equal when the values are actually meant to be weighted differently.
Best practices
- Double-check that each value is paired with its intended weight before reading the result.
Tips
- Weighted averages show up constantly in finance (portfolio returns), statistics (weighted means), and grading (weighted grade calculators) — the underlying formula is always the same.