Use the Free Calculator
Try our Grade Calculator โ instant results, no sign-up.
Open Calculator โOverview
Converting marks to letter grades follows a threshold system that varies between institutions. Understanding the boundaries helps you target the right score.
The Formula
Grade% = (Marks รท Total) ร 100 | A+ โฅ90 | A โฅ80 | B โฅ70 | C โฅ60 | D โฅ50 | F <50
Standard formula used by professionals worldwide
Worked Example
Step-by-step
78 out of 90 = 86.7% โ A grade
Key Points
- Accuracy: Results are as accurate as the inputs you provide
- Units: Always use consistent units throughout your calculation
- Privacy: All calculations on CalcHub Pro run in your browser โ nothing is sent to any server
Frequently Asked Questions
Passing grade?
Typically 50% but varies by institution and country.
GPA from letter grades?
A+=4.0, A=4.0, B=3.0, C=2.0, D=1.0, F=0.0 on standard 4.0 scale.
Can I improve after failing?
Yes โ resit policies vary but most institutions allow at least one resit attempt.