Weighted Average Calculator

Calculate a weighted average (weighted mean) of grades, prices or scores with different weights or percentages, step by step.

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How to use this calculator

Enter your values. The result updates as you type; press Calculate to confirm and jump to the result on mobile. Use Share to send the calculator with your result.

Weighted average formula

weighted average = Σ (value × weight) ÷ Σ weights

Example: 85 (30%), 72 (30%) and 90 (40%) → (25.5 + 21.6 + 36) = 83.1. The simple average would be 82.3.

Where it’s used

  • Course grades where tests and homework count differently.
  • GPA weighted by credit hours.
  • Average cost of shares bought at different prices.
  • Weighted average interest rate of several loans.

Frequently asked questions

How do I calculate a weighted average with percentages?

Multiply each value by its percentage, add them up and divide by 100 (or by the sum of the percentages).

Weighted vs simple average?

In a simple average every value counts equally; in a weighted average each counts by its weight.

About this tool

Written by
[Author: to be assigned]
Reviewed by
Formula tests passed · human review pending
Last updated
31 Oct 2026

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