Quick start
- For one exam, type the marks obtained and the total marks, for example 412 and 500.
- For several subjects, use the third box instead: 78/100, 85/100, 66/80.
- Read the percentage and the extra lines below it.
The formula
Percentage = marks obtained ÷ total marks × 100. For 412 out of 500: 412 ÷ 500 × 100 = 82.4%.
Several subjects with different totals
Add all the marks obtained and all the totals, then divide. For 78/100, 85/100 and 66/80: (78 + 85 + 66) ÷ (100 + 100 + 80) × 100 = 229 ÷ 280 × 100 ≈ 81.79%.
Do not simply average the three subject percentages (78%, 85% and 82.5%, averaging 81.83%). That gives the 80-mark subject the same weight as the 100-mark ones, so the answer is slightly off.
Marks needed for a target
Multiply the total by the target percentage. To reach 90% of 500 you need 0.9 × 500 = 450 marks. The calculator shows this for the next useful target.
Percentage and CGPA
CBSE has used the rule percentage ≈ CGPA × 9.5, so a CGPA of 8.6 is about 81.7%. The calculator shows the reverse conversion as a guide. Universities and other boards use their own formulas, so check the one printed on your marksheet.
Common questions
How do I calculate my percentage from marks?
Divide your marks by the total marks and multiply by 100. 360 out of 450 is 80%.
How do I find the percentage for all subjects together?
Add every subject's marks and every subject's total, then divide. Enter them in the third box as marks/total, separated by commas.
How do I convert CGPA to percentage?
For CBSE, multiply the CGPA by 9.5. Other boards and universities publish their own formulas.
Can I enter half marks?
Yes. Decimals such as 72.5 work.