Weighted Grade Calculator

How it is calculated

Each grade is multiplied by its weight, the products are added up and the sum is divided by the sum of the weights that were used.

final = (g₁·w₁ + g₂·w₂ + g₃·w₃ + g₄·w₄) ÷ (w₁ + w₂ + w₃ + w₄)

Up to four grade and weight pairs can be entered. Weights are percentages, but the tool divides by the weights actually entered, so they need not add up to 100: weights of 40 and 20 give a result based on 60 %, and the total weight is displayed so you can see that. The weights may not add up to more than 100, a negative weight is refused, and a grade must be between 0 and 200; any of these shows no result. A pair is skipped when its grade or its weight is empty, or when its weight is zero. With no valid pair there is no result. Both outputs are shown to 2 decimals. The grades can be on any scale, as long as all use the same one.

Common mistakes

• Leaving a weight empty while filling in the grade. That pair is skipped completely, with no warning: 88 at 40 % plus 72 with an empty weight gives just 88.00 on a total weight of 40.00.
• Entering weights as fractions (0.4, 0.35, 0.25). The tool accepts them and the grade is still 84.15, but the displayed total weight reads 1.00 instead of 100.00.
• Entering weights that add up to more than 100, such as 60 and 50. The tool shows no result instead of rescaling them.
• Assuming the result is your final course grade when the weights do not add up to 100. It is only the average of the categories entered, as the displayed total weight shows.
• Mixing grade scales, such as one grade out of 100 and another out of 10. Convert them to a common scale first.