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Weighted Average Calculator

Compute weighted average from value and weight lists.

Last validated: 2026-02-14

Use this free online Weighted Average Calculator to compute averages where each value contributes by assigned weight. It is useful when you need a focused browser-based utility that turns a specific set of inputs into a practical result quickly. The form focuses on Values, Weights and returns Weighted Average Inputs, Result, so you can move from input to answer without setting up a spreadsheet or custom script. Run one realistic example, adjust the inputs, and compare how the result changes before you copy or share it. Save the inputs with the result when the output will be shared, audited, or used as part of a larger workflow.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

Weighted Average Inputs

Enter comma-separated values and matching weights.

Result

Weighted average: 84.000000

Weight sum: 1.000000

How to use this tool

  1. Enter Values, Weights for the weighted average calculator, keeping units, dates, or text format consistent with the form labels.
  2. Check optional fields and assumptions before running so the result matches the workflow you have in mind.
  3. Click "Run the tool" and review Weighted Average Inputs, Result for the primary output.
  4. Copy or share the result together with the inputs so the output can be reproduced later.

Worked Example

Auto-generated from the tool's current default or entered inputs.

Example Inputs

  • Values: 80, 90, 75
  • Weights: 0.3, 0.5, 0.2
  • Weighted average: 84.0
  • Same length: true

Expected Outputs

  • Parsed values 0: 80
  • Parsed values 1: 90
  • Parsed values 2: 75
  • Parsed weights 0: 0.3

Interpretation

Confidence and limitations

Formula References

Assumptions

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