Weighted Average Calculator

Calculate a weighted mean from value,weight pairs without headers online

Combine scores or measurements with unequal weights. Use value,weight pairs without a header; the sum of weights must be positive.

How to use it

Enter Value,weight rows or select Try example. Review the displayed input. Select Calculate and inspect the result before copying or downloading.

Calculation method

Weighted mean = sum(value × weight) ÷ sum(weights). For values 10 and 20 with weights 1 and 3, the result is (10 × 1 + 20 × 3) ÷ 4 = 17.5. Enter one value,weight pair per line, without a header.

Worked examples

Combine scores or measurements with unequal weights.

Worked example — Weighted Average Calculator

Settings: No additional options

Input:

10,2
20,3

Output:

Weighted mean: 16
Total weight: 5

The example output has 2 lines. Compare its order, separators and whitespace with the input before copying the result.

Limitations and common mistakes

• Use value,weight pairs without a header; the sum of weights must be positive.

Frequently asked questions

How can I compute a weighted mean from value,weight pairs without headers online?

Enter Value,weight rows or select Try example. Review the displayed input. Select Calculate and inspect the result before copying or downloading.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

Useful next tools

• Number List Statistics
• Fraction Calculator
• Ratio Simplifier
• Scientific Notation Converter