Weighted Average Calculator
Average values where some count for more than others - grades, scores or prices.
Your result will appear here as soon as you add some input.
How to use it
- 1Enter your values in the fields above.
- 2The answer and the working appear immediately below.
- 3Check the working to see the formula with your numbers substituted.
Example
Input
Values 85, 72, 90 with weights 30, 20, 50
Output
84.9
Formulas used
- weighted average = sum(value x weight) / sum(weights)
About the Weighted Average Calculator
Weights do not need to add up to 1 or to 100 - they are normalised by their own total. You can use raw credit hours, percentages or any consistent scale.
Each value needs exactly one weight, in the same order. The breakdown table shows each contribution so a mismatch is easy to spot.
Questions people ask
Is your figures uploaded to a server?
No. This tool runs entirely in your browser using standard web APIs, so your figures never leaves your device. You can confirm it by opening your browser's network panel while the tool runs, or by disconnecting from the internet after the page has loaded.
Is it free, and do I need an account?
Yes, it is free, and there is no account, no sign-up and no watermark on the result. The project is funded by optional donations.