How to Calculate Weighted Averages for Grades in Excel

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Weighted average grades are a way for a teacher to place more importance on one assignment than another. For example, if a student scores 100 on a test worth 30 percent of his grade and 50 on a test worth 70 percent of his grade, then the 50 score will have a bigger impact than the 100 score on the final grade. You can use Microsoft Excel to quickly make these calculations.

  • Type "Grade" in cell A1, "Weight" in B1 and "Total Worth" in C1.

  • Type your grades in column A. For example, if you received a 95 and an 80, then type "95" in A2 and "80" in A3.

  • Type the weight each grade has in column B, next to its corresponding grade. In the example, if the first grade is worth 60% and the second grade is worth 40%, then type 60% in B2 and 40% in B3.

  • Type "=A2*B2" in cell C2. This weights the grades. Copy and paste this formula next to each grade.

  • Type "=sum(" in column C after your last grade, then highlight all the cells that have a number in coumn C and hit the "Enter" key. The result that appears is your weighted average.

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