How to Calculate Percentage of Marks (With Examples)

Result day brings one question in every home: "What's the percentage?" Admission forms, scholarships, job applications and entrance-exam eligibility all ask for it. Calculating it is simple once you know the formula – but there are a few common traps, like averaging percentages or forgetting that subjects can have different maximum marks. This guide walks through every common case with worked examples.

The basic formula

Percentage = (Marks obtained ÷ Maximum marks) × 100

Example: five subjects, each out of 100. You scored 78, 85, 69, 92 and 88.

1. Add your marks: 78 + 85 + 69 + 92 + 88 = 412.
2. Add the maximum marks: 5 × 100 = 500.
3. Divide and multiply by 100: 412 ÷ 500 × 100 = 82.4%.

That's it. The same formula works for a single test (for example, 36 out of 40 = 90%) and for a whole year.

Subjects with different maximum marks

Sometimes subjects are not all out of 100. For example: English 85 out of 100, Hindi 42 out of 50, and Computer Science 90 out of 100. Always add all the marks first, then all the maximums:

(85 + 42 + 90) ÷ (100 + 50 + 100) × 100 = 217 ÷ 250 × 100 = 86.8%.

A common mistake is to work out each subject's percentage (85%, 84% and 90%) and average them. That gives 86.33%, which is wrong, because it treats the 50-mark paper as if it were worth as much as the 100-mark papers. Only average percentages when every subject has the same maximum marks.

Theory and practical marks

Many science subjects are split into theory and practical, for example Physics: 58 out of 70 in theory and 28 out of 30 in practicals. Add them to get the subject total: 86 out of 100. Then include that subject in your overall total as usual.

"Best of five" percentage

Many schools, colleges and admission forms calculate percentage using your best five subjects, especially for Class 10 and Class 12. Rules differ – some require English to be included, or a specific main subject – so always check the admission notice.

Example: six subjects with marks 78, 85, 69, 92, 88 and 61.

• All six subjects: 473 ÷ 600 × 100 = 78.83%.
• Best five (dropping the 61): 412 ÷ 500 × 100 = 82.4%.

The best-of-five method can raise your percentage noticeably, so it is worth knowing which method a form wants.

How many marks do I need?

Working backwards is just as useful before an exam.

• Target total: to get 75% out of 600, you need 600 × 75 ÷ 100 = 450 marks.
• Marks needed in the last paper: suppose the total is 500 and you want 80% (400 marks). You have already scored 310 out of 400 in four papers. You need 400 − 310 = 90 out of 100 in the last paper.

Rounding

If your percentage comes out as something like 82.456%, write it the way the form asks – usually to two decimal places (82.46%). Some forms want a whole number. Don't round up to meet an eligibility cut-off: if the requirement is 60% and you have 59.8%, most institutions treat that as below 60%.

CGPA and grades

If your marksheet shows a CGPA instead of marks, you need a conversion formula. CBSE, for example, advises multiplying CGPA by 9.5 for an indicative percentage, so 8.4 CGPA ≈ 79.8%. Universities often use different formulas. Our CGPA to percentage calculator lists the common ones and explains which to use.

Quick checklist

• Add all marks, add all maximums, then divide.
• Don't average percentages unless all subjects have the same maximum.
• Check whether the form wants all subjects or best five.
• Include practical or internal marks if they are part of the subject total.
• Round only as the form instructs.

Frequently asked questions