How to calculate your Weighted Average Mark

A Weighted Average Mark (WAM) is calculated based on results for all completed subjects within a diploma or degree, where results are out of 100. This includes subjects for which you gained a failing score or grade. Ignore any subjects for which there are no scores, or where only a non-scoring pass or fail is possible.

Calculating a WAM is a three-step process:

  1. Add up all credits for subjects where you have gained a result. This includes failing scores.
  2. For each subject completed, multiply the subject’s credits by the final result score.
    • a. Now add each of these results together.
  3. Divide the total reached in 2a by the total credits. This will give you your WAM.
WAM =
sum(subject credits * subject result)
sum of all credits

There is no difference in how subjects are calculated based on when they were completed. In a WAM calculation, first-year subjects have the same weighting as final-year subjects.

Looking at an example:

Subject Credits Result Credits * Result
English Writing 6 85 510
Introduction to Business 6 75 450
Statistics 1 4 80 320
Advanced Mathematics 8 73 584
Economics 101 8 70 560
20th Century History 6 12 72
Introduction to Philosophy 6 78 468
Economics 102 8 Pass N/A
Statistics in Practice 6 65 390
Total 50 -- 3354
    WAM 67.08

Using the above example:

  1. Sum of credits (excluding non-score subject): 6+6+4+8+8+6+6+6 = 50
  2. Sum of credits * results: (6*85)+(6*75)+(4*80)+(8*73)+(8*70)+(6*12)+(6*78)+(6*65) = 3354
  3. 3354 divided by 50 = 67.08

This student’s WAM is 67.08.

Converting into a single-letter grade from a transcript of letter grades

If your transcript shows only letter grades, you must figure out an average grade overall. This can be done in the
following way:

  1. Add up all credits for subjects where you have gained a grade. This includes failing grades.

On your transcript, there should be a grading scale or reference that translates your letter grades into number scores.

  1. Using this reference information, convert all of your letter grades into numerical scores.
  2. For each subject, multiply the number of credits by the converted score.
    1. Now add each of these results together.
  3. Divide the total reached in 3a by your total credits.
  4. Convert the number found in item 4 back into a letter grade using the transcript reference.

Possible grading scale:

Letter Grade Number Score
A 80 – 100
B 70 – 79
C 60 – 69
D 50 – 59
F 0 – 49
No score for Pass/Fail only subjects

Example subjects and grades

Subject Credits Grade Converted Scores Credits * Scores
English Writing 6 A 90 540
Introduction to Business 6 B 75 450
Statistics 1 4 A 90 360
Advanced Mathematics 8 B 75 600
Economics 101 8 D 55 440
20th  Century History 6 F 0 0
Introduction to Philosophy 6 B 75 450
Economics 102 8 Pass N/A N/A
Statistics in Practice 6 C 65 390
Total 50 3230
WAM = 63.6 63.6 = C

When there is a range of scores for each grade, convert to the median score.

A = 90, B = 75, C = 65, D = 55, F = 0. A fail always = 0.

Using the above example:

  1. Sum of credits (excluding non-graded subject): 6+6+4+8+8+6+6+6 = 50
  2. Convert all grades: 90, 75, 90, 75, 55, 0, 75, 65
  3. Sum of credits * results: (6*90)+(6*75)+(4*90)+(8*75)+(8*55)+(6*35)+(6*75)+(6*65) = 3230
  4. 3230 divided by 50 = 64.6
  5. Convert back to a letter using the grading scale: 63.6 = C

This student’s overall grade is: C.