Enter observations in box, use a separate line or comma between each pair of measurements.

Pairs should be entered as: Value, Weighting. Weighting can be either a percentage or a volume (such as lbs).

Example shown is $$ per lb for recycled plastic weighted by lbs bought.

- Sample Calculator: Mean, Variance, Standard Error
- Linear Regression Calculator
- Outlier Calculator
- Coefficient of Variation Calculator
- Weighted Grade Calculator

This Weighted Average Calculator calculates the average value of a set of observations, weighted by a second factor. This second factor can be a percentage (ideally of the total sample) or a base volume number (such as lbs, tons, or operating hours). The weighted average calculator tallys up the total volume of activity, weighted by the second factor. Thus, observations with a lot of volume / share behind them will count more significantly towards the total than observations with minimal activity. We did a version of this specifically for calculating the Weighted Average Grade of a course from the individual tests, assignments, and projects.

Need to pass an answer to a friend? It's easy to link and share the results of this calculator. Hit calculate - then simply cut and paste the url after hitting calculate - it will retain the values you enter so you can share them via email or social media.