# Grade Calculator

Weighted average (a) is equal to the sum of the product of the weight (wi) times the data number (gi) divided by the number of subjects. It is a mean calculated by giving values in a data set more influence according to some attribute of the data. Here is a simple free online Grade Calculator which helps you to calculate the average grade. The weighted average simply takes into account how much each course is worth when calculating the average.

## Weighted Average Calculator

Code to add this calci to your website

#### Formula:

a=∑ ( W_{i} x G_{i} ) / n
**Where,**
a = Average Grade
W_{i} = Weights
G_{i} = Grades (%)
n = No of Subjects
By using weighted average, grades are computed. You can simply add up all the item values and divide by the total number of subjects to calculate the average.

#### Example

**A student has earned marks in Physics & Maths as follows:**
Physics 89% (Weight - 9)

Maths = 75% (Weight - 7)

Average Grade = ∑ ( 89 x 9) + (75 x 7) / 2

= ∑ (801 + 525) / 2

= 82.47