Compute an average where some values matter more than others. Enter your values on one line and a matching list of weights on another, and the tool returns the weighted mean, the sum of each value times its weight divided by the sum of the weights. This is the average you want when items have different importance, such as course grades weighted by credit hours, survey scores weighted by group size, or a portfolio return weighted by how much you hold of each asset. When every weight is equal, the weighted mean collapses to the ordinary arithmetic mean, so it is a strict generalization. The tool checks that you supply one weight per value and that the weights sum to something positive. It also reports the total weight so you can verify your inputs. All computation happens locally in your browser, so your data stays private.
It is an average where each value is multiplied by its weight, so more important items count for more.
It sums each value times its weight, then divides by the total of all the weights.
Grade point averages and portfolio returns use weighted means, where credits or amounts act as the weights.
Compute an average where some values matter more than others. Enter your values on one line and a matching list of weights on another, and the tool returns the weighted mean, the sum of each value times its weight divided by the sum of the weights.
Yes. Weighted Mean Calculator is completely free, with no sign-up and no usage limits.
Yes. Weighted Mean Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Weighted Mean Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.