Marks Percentage Calculator
Calculate your exam marks percentage across all subjects instantly. Enter marks obtained and maximum marks for each subject to get your overall percentage.
Updated 2026-06-14 · Free · No sign-up · Runs privately in your browser
Show the formula & steps
How the Marks Percentage Calculator Works
This calculator converts your exam scores into an overall percentage. Enter the marks obtained and the maximum marks for each subject (up to six). It totals both columns and returns your combined percentage, along with the totals it used so you can check the result.
The Formula
The correct way to combine subjects is to total the marks first, then divide:
Percentage = (total marks obtained ÷ total maximum marks) × 100
This weights each subject by its maximum marks automatically. A subject out of 200 counts twice as much as one out of 100 — exactly as it should. Averaging the individual percentages would only be valid if every subject had the same maximum.
Worked Example
Suppose a student scored the following:
| Subject | Marks obtained | Maximum marks |
|---|---|---|
| English | 78 | 100 |
| Maths | 92 | 100 |
| Science | 85 | 100 |
| History | 71 | 100 |
| Computer | 100 | 100 |
- Total obtained = 78 + 92 + 85 + 71 + 100 = 426
- Total maximum = 100 × 5 = 500
- Percentage = 426 ÷ 500 × 100 = 85.2%
Why Total Marks, Not Averaged Percentages
If one subject were marked out of 200, averaging percentages would understate or overstate the true result. Consider Maths out of 200 with 180 scored (90%) and English out of 100 with 60 scored (60%):
- Averaging percentages: (90 + 60) ÷ 2 = 75%
- Correct method: (180 + 60) ÷ (200 + 100) × 100 = 240 ÷ 300 × 100 = 80%
The correct figure (80%) reflects that Maths carried more weight. This calculator always uses the totals method, so it stays accurate even when subjects have unequal maximum marks.
Converting Back and Forth
- Marks from percentage: marks = percentage ÷ 100 × maximum marks.
- Marks needed for a target: required = target% ÷ 100 × total maximum − marks already secured.
These let you set goals — for instance, working out the score you still need in a final exam to reach an overall 85%.
Frequently asked questions
How do I calculate the percentage of my marks?+
Add up the marks you obtained in every subject, add up the maximum marks of those same subjects, then divide the totals and multiply by 100. For example, 426 obtained out of 500 maximum is 426 ÷ 500 × 100 = 85.2%.
How do I calculate the percentage of a single subject?+
Divide the marks you scored in that subject by its maximum marks and multiply by 100. Scoring 78 out of 100 gives 78 ÷ 100 × 100 = 78%. Enter just that one subject in the calculator to get its standalone percentage.
Should I average the per-subject percentages instead?+
Only if every subject is out of the same maximum. The correct general method is to total all obtained marks and divide by total maximum marks. Averaging percentages directly is wrong when subjects carry different maximum marks (weights).
How do I find marks from a percentage?+
Multiply the percentage (as a decimal) by the maximum marks. To get 85% of a 500-mark total, calculate 0.85 × 500 = 425 marks. This is the reverse of the percentage formula.
What percentage is considered a first-class result?+
In many education systems a first class is 60% or above, a distinction is often 75% and above, and a pass is typically 33% to 40%. The exact grade bands are set by your board or university, not by a universal rule.