If you don't know your weighted average so far just use the calculator below.

To calculate your weighted grade all you need to do is multiply the mark you got in each part of your class by the percentage it is worth towards your final mark. You do the same for each part of the class and then add the answers together. For example if you got 85% on a test worth20% of your final grade and 70% on an assignment worth 25% the sum would be (85 x 0.2) + (70 x 0.25) = 34.5% out of a possible 45%. To work out your weighted average so far you simply divide 34.5 by 45 and multiply by 100 = 76.67%.

To work out what you need on your final you use this formula:

(g1 * w1) (x * w2) = fg

where:

g1 = your average grade so far

w1 = the amount it is worth towards final grade

x = the grade you need on your final

w2 = the weighting of your final

fg = the final grade you want

so using the prior example, you have 76.67% from 45% of the course what mark do you need on your final to get 90% overall.

Using the formula this would be

(76.67 * 0.45) (x * 0.55) = 90

34.50 * 0.55x = 90

0.55x = 55.5

x = 55.5/ 0.55

x = 100.91.

To get 90% overall you would need 100.91% on your final and so is impossible to do.

To calculate your weighted grade you simply multiply the percentage you get by the weight it has towards your final grade.

If you get 83% on a assesment worth 20%, 78% on an assesment also worth 20% and 81% on your final worth 60% the you do this sum:

(83 * 0.2)+(78 * 0.2)+(81 * 0.6) = 80.8. This is your final grade