Weighted Average Solver
Not all numbers are created equal. Use our solver to calculate the weighted mean for grades, portfolios, or inventory with precision.
Weight Configuration
Calculated Average
83.6
Total Weight
100
Data Points
3
Grade Weighting
Portfolio Balance
Understanding Weights
A weighted average is a calculation that takes into account the varying degrees of importance of the numbers in a data set.
The Formula
x̄_w = Σ (w_i * x_i) / Σ w_i
- x_i = The value of the data point
- w_i = The weight of the data point
- Weights do NOT have to add up to 100%
Primary Use Cases
Academic Grading
Calculating final grades where the final exam counts for more than weekly quizzes.
Investment Portfolios
Determining the overall return of a portfolio based on the percentage of capital in each stock.
Business Inventory
Calculating Weighted Average Cost (WAC) for inventory valuation in accounting.
Expert Insight
In Finance, the **WACC** (Weighted Average Cost of Capital) is the most critical metric for determining if a company's investment is worth the risk.
Grade Example
The Data
The Result
73.00
Even though you aced the quiz (100), the exam (70) pulls the average down significantly because it carries more weight.