Use this free Weighted Average Calculator to quickly compute the weighted average of any set of values. Perfect for calculating course grades, portfolio returns, or any data where items have different weights.
| # | Name (optional) | Value | Weight |
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How To Use This Weighted Average Calculator
The Weighted Average Calculator computes the average of a set of values where each value carries a different weight or importance. This is commonly used for calculating course grades (where courses have different credit hours), investment portfolio returns, or any scenario where not all items contribute equally.
Enter your values and their corresponding weights into the table. You can optionally name each row to keep track of what each entry represents. Click “Calculate Weighted Average” to see your result instantly. The tool also shows the full calculation steps, sum of weights, simple (unweighted) average for comparison, and the weighted sum.
Use the “Decimal Places” dropdown to control how many decimal places appear in your result. Click “+ Add Row” to add more entries, or
the x button to remove a row you no longer need. The calculator pre-fills with example course data so you can see how it works right away.
Frequently Asked Questions
What is a weighted average and how is it different from a regular average?
A weighted average multiplies each value by its weight, sums the products, then divides by the total weight. A regular (simple) average treats every value equally. Use a weighted average when some items matter more than others, such as courses with more credit hours.
How do I calculate my weighted average grade?
Enter each course grade as a value and the number of credits or weight for that course. The Weighted Average Calculator will multiply each grade by its weight, add them up, and divide by the total credits to give you your weighted grade average.
What is the formula for weighted average?
The formula is: Weighted Average = (v1 x w1 + v2 x w2 + … + vn x wn) / (w1 + w2 + … + wn). The Weighted Average Calculator above shows this full calculation breakdown so you can verify the math.
Can I use this calculator for things other than grades?
Yes. The Weighted Average Calculator works for any data set where items have different weights. Common uses include investment portfolio returns, employee performance scores, survey results, and sports statistics.
How do weighted averages work with GPA?
Each course grade is converted to a point value, then multiplied by the credit hours for that course. The total is divided by the total credit hours. For example, an A (4.0) in a 4-credit course and a B (3.0) in a 3-credit course gives a weighted GPA of (4×4 + 3×3) / (4+3) = 3.57
What happens if all my weights are equal?
If every item has the same weight, the weighted average equals the simple average. The calculator shows both values in the summary tags so you can compare them side by side.
