This calculator determines the weighted average (mean) associated with the entered data values and weights.
The weighted average (mean) is calculated using the following formula:
Weighted Average (x) = 

Where,
w_{i} = Weight assigned to the i^{th} product,
x_{i} = Data value,
∑ = Sum of all the terms.
The formula can also be expressed as:
x = 

Let's take an example.
Suppose, you have class grades 77, 86, and 91, with weights of 5, 3, and 6. Calculate the weighted average for the given data.
Here,
x_{1} = 77
x_{2} = 86
x_{3} = 91
w_{1} = 5
w_{2} = 3
w_{3} = 6
Now put all the values into the formula.
x = 

x = 

x = 

Weighted Average (x) = 84.93.