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How to Calculate Marks Percentage (All Subjects and Best of Five)
The formula, a worked Class 10 example with all six subjects and the best five, and how to handle papers with different totals.
By Team Vind · Updated · 4 min read
Results are out and a form wants your percentage. The basic formula is simple, but people often get it slightly wrong: averaging subject percentages instead of adding marks, or counting all six subjects when the board counts the best five. Here's the right way, with worked examples.
The formula
Percentage = (marks obtained ÷ maximum marks) × 100
Add up the marks you scored in every subject that counts, add up the maximum marks for those same subjects, divide, and multiply by 100. For one subject, 68 out of 80 is 68 ÷ 80 × 100 = 85%.
Worked example: Class 10, six subjects
| Subject | Marks (out of 100) |
|---|---|
| English | 84 |
| Hindi | 78 |
| Mathematics | 91 |
| Science | 88 |
| Social Science | 82 |
| Information Technology | 95 |
- All six subjects: 518 ÷ 600 × 100 = 86.33%
- Best five: 95 + 91 + 88 + 84 + 82 = 440, ÷ 500 × 100 = 88%
Try it: Marks Percentage Calculator
Your Percentage
Subject by subject
| Subject | Marks | Percentage | Counted |
|---|---|---|---|
| English | 78 / 100 | 78% | Yes |
| Maths | 92 / 100 | 92% | Yes |
| Science | 85 / 100 | 85% | Yes |
| Social Science | 81 / 100 | 81% | Yes |
| Hindi | 74 / 100 | 74% | Yes |
| IT | 88 / 100 | 88% | Yes |
Best of five: when does it apply?
CBSE doesn't print an overall percentage on the marksheet. Colleges and admission portals commonly take the best five subjects, usually including English (or a language). Many state boards print the total of all subjects instead. Read the admission notice: it says whether to count all subjects, the best five, or particular subjects such as Physics, Chemistry and Maths for engineering.
Subjects with different maximum marks
When papers have different totals, add the marks and the maximums. Don't average the separate percentages, because that gives small papers too much weight.
| Part | Marks | Out of |
|---|---|---|
| Theory paper | 62 | 70 |
| Practical | 28 | 30 |
| Project | 18 | 20 |
Correct: 108 ÷ 120 × 100 = 90%. Averaging the three percentages would give 90.63%, which is wrong.
Rounding
Keep two decimal places, as most forms ask (for example 86.33%). Don't round up to meet a cut-off: 59.99% is not 60%, and admission offices check against the marksheet.
Frequently asked questions
How do I calculate percentage of 5 subjects?
Add the marks of the five subjects, divide by 500 (if each is out of 100), and multiply by 100. For example, 430 ÷ 500 × 100 = 86%.
Does CBSE give an overall percentage?
No. CBSE marksheets show subject marks and grades. Colleges calculate the percentage themselves, often from the best five subjects.
Should the additional (sixth) subject be included?
Only if the admission rules say so. Under best of five, a sixth subject counts only if it is among your top five scores and the rules allow it.
Is it right to average subject percentages?
Only when every subject has the same maximum marks. Otherwise, add the marks and the maximums and divide once.
Sources
Last reviewed: 10 October 2026