Quick Answer
Percentage is calculated as (Marks Obtained ÷ Total Marks) × 100, then mapped to a letter grade using a grading scale — commonly A+ for 90%+, A for 85%+, B+ for 80%+, B for 75%+, C+ for 70%+, C for 60%+, D for 50%+, and F below 50%.
What Is a Grade Calculator?
A grade calculator converts raw exam or assignment marks into a percentage, and then into the letter grade your institution uses to report results. While the percentage calculation is always the same simple division, the letter-grade boundaries (what percentage counts as an A versus a B) vary by country, school board, and even individual institution.
The scale used here follows a common general/Pakistan-style grading pattern: A+ at 90% and above, A at 85%, B+ at 80%, B at 75%, C+ at 70%, C at 60%, D at 50%, and F below 50%. Many universities and boards use slightly different cutoffs, so this is a useful general reference rather than a universal standard — always check your specific institution's official grading policy for anything that affects your transcript or GPA.
Alongside the letter grade, the calculator also shows an approximate grade point on a 4.0 scale, useful for students who need to estimate their GPA contribution from a single exam or assignment before official results are posted.
How to Use This Grade Calculator
- 1Enter the marks you obtained.
- 2Enter the total marks the exam or assignment was out of.
- 3The calculator instantly shows your percentage, letter grade, and approximate grade point.
The Formula Explained
Percentage = (Marks Obtained ÷ Total Marks) × 100A+ ≥90% · A ≥85% · B+ ≥80% · B ≥75% · C+ ≥70% · C ≥60% · D ≥50% · F <50%Example: 85 marks obtained out of 100
- Percentage = (85 ÷ 100) × 100 = 85%
Tips & Things to Know
- Grading scales vary meaningfully between institutions and countries — always confirm the official scale your school, college, or university uses before relying on a calculated letter grade for anything important.
- This tool calculates a single assignment or exam's grade — your overall course or semester grade may be weighted differently across multiple assignments, midterms, and finals.
- A percentage very close to a grade boundary (like 84.5% near the 85% cutoff) is worth double-checking against your institution's exact rounding policy — some round up, some don't.
- Grade points on a 4.0 scale are approximate here — your university's official conversion table is the authoritative source for GPA calculations that appear on transcripts.