How to use this calculator
- Enter or choose maximum marks on the paper.
- Enter or choose grade boundaries (one per line: grade, minimum %).
- Enter or choose raw mark boundaries.
- Enter or choose your mark.
- The grade for your mark updates as you type. Use Copy result or Share to keep it.
Method
Boundary mark = ⌈Boundary% × Maximum ÷ 100⌉; Grade = highest grade whose boundary mark ≤ your mark; To next = next boundary mark − your mark
- Boundary%
- minimum percentage for a grade
- Maximum
- total marks available on the paper
Worked example
- Boundaries out of 120: A 0.80 × 120 = 96, B 84, C 72, D 60, E 48.
- 87 is at least 84 but below 96, so it is a B (72.5%).
- An A needs 96 − 87 = 9 more marks.
87 out of 120 is a B, 9 marks short of an A at 96.
What the result means
Exam boards often set boundaries after marking, so they can move from one series to the next. Use the published boundaries for the right paper and session.
Assumptions and limits
- A mark equal to a boundary earns that grade.
- Boundaries set directly in raw marks, or grades based on combined papers and coursework, need those totals entered as the maximum.
Questions
Why round boundaries up?
A whole-mark paper cannot award 52.5; a 70% boundary on 75 marks needs 53 marks to reach it.
Can I use letter grades with plus and minus?
Yes, any labels work, such as “A+ 90”, as long as each line ends with its percentage.