Grade Calculator

How to Use This Calculator

1. Enter the marks obtained and the total marks for the subject.
2. Click Calculate Grade.
3. Your percentage and letter grade appear together in the result card.

What is a Grade Calculator?

A Grade Calculator is a useful academic tool that converts obtained marks into percentages and assigns a grade based on predefined grading criteria. Students commonly use it after exams, assignments and assessments to evaluate their performance.

Knowing your grade helps you identify strengths, track progress and set realistic academic goals for future examinations.

Formula

Percentage = (Obtained Marks ÷ Total Marks) × 100

Grade Scale

• 90% – 100% → A+
• 80% – 89% → A
• 70% – 79% → B+
• 60% – 69% → B
• 50% – 59% → C
• 40% – 49% → D
• Below 40% → F

Example

Obtained Marks = 450

Total Marks = 500

Percentage = (450 ÷ 500) × 100

Percentage = 90%

Grade = A+

Benefits

• Quickly estimate grades.
• Track academic performance.
• Set score targets.
• Prepare for future exams.
• Understand grading systems.

Practical Use Cases

• Quickly checking what letter grade a set of marks corresponds to before an official grade card is released.
• Estimating the grade you'd get for different possible scores while still preparing for an exam.

Common Mistakes to Avoid

• Assuming every institution uses the same grade boundaries — grading scales vary widely between schools, colleges and countries.
• Entering marks obtained higher than the total possible marks by mistake, which produces an impossible percentage.
• Treating a single subject's grade as your overall result instead of combining it with other subjects.

Frequently Asked Questions

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