Weighted Average Calculator
Enter value-and-weight pairs to compute a weighted average that reflects the relative importance of each value.
Sum of (value × weight) divided by the sum of weights.
3
6
83.3333
Formula
About this calculator
A weighted average gives different values different levels of influence on the final result, unlike a simple average where every value counts equally. Each value is multiplied by its weight, the products are summed, and that total is divided by the sum of all the weights.
Weighted averages appear everywhere: a course grade where exams count more than homework, a GPA where credit hours weight each course, an average price weighted by quantity purchased, or a survey result weighted by sample size. Enter one value-and-weight pair per line — for example "90, 3" — and the calculator returns the weighted mean. The weights do not need to add up to 1 or 100; only their relative sizes matter.
Frequently asked questions
A simple average treats every value equally. A weighted average lets some values count more by assigning them larger weights, so values with higher weights pull the result toward themselves.
No. Only the relative sizes of the weights matter, because the formula divides by the total of the weights. Weights of 3, 2, 1 give the same result as 0.5, 0.333, 0.167.
Put one value-and-weight pair per line, separated by a comma or space, such as "90, 3". The first number is the value and the second is its weight.
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