🎓 Education & Percentage Calculators

Turn marks into a percentage, grade or merit score in seconds. Calculators for everyday percentage maths, exam grades and the ICSE, ISC and India Post GDS formats.

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Percentage Calculator

Find percentages, percentage change, and percentage difference with 6 formula types.

Math
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Grade Calculator

Calculate exam percentage, letter grade (A/B/C), and GPA score online free. Perfect for students and teachers.

Education
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ICSE Percentage Calculator

Class 10 percentage from your best five subjects with English counted. Includes ICSE grade to percentage.

Education
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ISC 12th Percentage Calculator

Class 12 percentage from English plus your best three subjects, with PCM or PCB aggregate.

Education
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GDS Percentage Calculator

India Post GDS merit percentage from 10th marks or CGPA, to four decimal places.

Education · India
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CGPA to Percentage Calculator

Convert CGPA or SGPA to percentage with the CBSE 9.5 rule, VTU, Anna University or GTU formula, and back.

Education · India
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Marks Percentage Calculator

Subject-wise marks with any maximum marks to total, percentage, division and marks needed for a target.

Education

Which marks calculator should I use?

The Percentage Calculator handles any percentage task, including percentage of a number, percentage change and percentage difference. The Grade Calculator turns marks obtained and total marks into a percentage and a letter grade.

For board exams, pick the one that matches your board. The ICSE Percentage Calculator uses English plus your best four subjects, the ISC Percentage Calculator uses English plus your best three, and the GDS Percentage Calculator works out the India Post Gramin Dak Sevak merit percentage from Class 10 marks to four decimal places.

Always check your school or board's own rules before relying on a result, because subject choices and rounding can differ.

Guides to read before you calculate

Read the method behind the numbers, with worked examples and official sources:

All guides →

Frequently Asked Questions

How do I calculate a percentage from marks?
Divide marks obtained by total marks and multiply by 100. For example, 42 out of 50 is 84%.
Which calculator should I use for ICSE and ISC results?
Use the ICSE calculator for Class 10 and the ISC calculator for Class 12. Each picks English plus your best remaining subjects automatically.
What is the GDS merit percentage?
India Post ranks Gramin Dak Sevak applicants by their Class 10 percentage, worked out to four decimal places. The GDS Percentage Calculator shows your merit percentage and compares it with your circle's cut-off.