How the grade calculator works
Last updated 10 November 2026
Tests are marked out of 20, 50 or 100, but a course combines them as percentages. This calculator does the conversion and the weighting.
How it works
- Percentage = marks you got ÷ total × 100.
- Overall = the weighted average of those percentages.
Worked example
With the starting figures:
- The example gives an overall percentage of 76.5%.
- In total you got 149 marks out of 200.
Why marks need converting
Tests are marked out of twenty, fifty or a hundred, but a course combines them as percentages. A mark of seventeen out of twenty is not the same as seventeen out of fifty. This calculator converts each assessment to a percentage and then weights them to give your overall percentage.
What to enter
- The name of each assessment, such as a test, assignment or practical
- The mark you got and what it was out of
- The weight of the assessment, which is its share of the course mark
Reading the result
Each row shows its percentage and how much it adds to your overall mark. The overall percentage is the weighted average of the rows. The result also shows your total marks out of the total available, which is a plain sum and does not use the weights.
Where to find the weights
The weight of each assessment is in your course guide or the study guide for the module. Use the numbers there, and check that they add up to the whole course. If you have not yet written some assessments, the required exam mark calculator shows what you need to reach a target.
What this does not do
The calculator gives a percentage. It does not give a symbol or a level, because those scales differ by institution. Your institution's own rules, including rounding and subminimums, always decide your marks. Nothing you enter is saved.
A worked idea in words
Say a test is worth a fifth of the course and you got seventeen out of twenty. That is eighty-five percent, and it contributes a fifth of eighty-five percent to your overall mark. Do this for each assessment, add them up and you have your course mark so far. If assessments are still to come, treat them as zero to see the lowest the mark could be.
Things to watch
- Use the weights from your course guide.
- Your institution’s own rules always decide your marks.
See also the final mark calculator. Read the full disclaimer.