Grade Percentage Calculator
Turn marks into a percentage, or find out what you need in the final exam to hit your target.
Grade calculator
Convert a score, or plan for the grade you are aiming at.
Convert a raw score into a percentage.
Find the final exam score that reaches your target.
Recent calculations
What this calculator does
The first tab does the everyday conversion: marks out of a total, expressed as a percentage. The second tab answers the question that actually keeps students up at night — given where I stand now and how much the final is worth, what do I need to score to finish on the grade I want?
That second calculation is worth doing early in a term rather than the night before. If it tells you the target needs 103%, you know to adjust either the target or the amount of work going into the remaining assessments, while there is still time to do something about it.
How to use it
For a straight conversion, enter your marks and the total available. For the planning tool, enter your current overall percentage, the weight the final exam carries in your overall grade, and the grade you are aiming for. The result includes a plain-English note about whether the target is actually reachable.
The formulas
where W = final exam weight ÷ 100
Worked examples
Scoring 68 out of 80
- Divide: 68 ÷ 80 = 0.85
- Multiply by 100: 85%
Currently at 78%, final worth 30%, aiming for 85%
- Already secured: 78 × 0.7 = 54.6 percentage points
- Still needed: 85 − 54.6 = 30.4 points
- From an exam worth 30%: 30.4 ÷ 0.3 = 101.33% needed
That last example is deliberately uncomfortable. It shows a target sitting just out of reach, which is exactly the kind of thing worth knowing while there is still a term left to run.
Common mistakes
Averaging percentages from tests of different lengths. A 90% on a 10-mark quiz and a 60% on a 100-mark exam do not average to 75%. Add the raw marks — 9 + 60 out of 110 — which gives 62.7%.
Ignoring assessment weights. If coursework is worth 70% and the exam 30%, they contribute very unequally to your final grade regardless of the marks available in each.
Rounding up early. A 79.4% that gets rounded to 79 in one system and 80 in another can sit either side of a grade boundary. Check how your institution rounds before assuming.