Percentage to Grade Converter
Convert a percentage score to a letter grade using multiple international grading scales.
How the Percentage to Grade Converter Works
Different countries, examination boards, and institutions use different grading scales. This converter lets you select from seven common grading systems and instantly see what letter or number grade corresponds to your percentage score.
Grading Scales Reference
Standard US (90-80-70-60)
A = 90\u2013100%, B = 80\u201389%, C = 70\u201379%, D = 60\u201369%, F = 0\u201359%
Standard US with +/-
A+ = 97\u2013100%, A = 93\u201396%, A- = 90\u201392%, B+ = 87\u201389%, B = 83\u201386%, B- = 80\u201382%, etc.
UK GCSE (9-1) [Approximate]
Uses number grades 9 (highest) to 1. Approximate percentage equivalents based on general grade boundaries.
UK A-Level (A*-E)
A* = 90\u2013100%, A = 80\u201389%, B = 70\u201379%, C = 60\u201369%, D = 50\u201359%, E = 40\u201349%
Cambridge IGCSE (A*-G)
Based on the PUM ranges: A* = 90\u2013100%, A = 80\u201389%, B = 70\u201379%, etc.
ZIMSEC O-Level
A = 75\u2013100%, B = 65\u201374%, C = 50\u201364%, D = 40\u201349%, E = 35\u201339%, U = 0\u201334%
ZIMSEC A-Level
A = 80\u2013100%, B = 70\u201379%, C = 60\u201369%, D = 50\u201359%, E = 40\u201349%, F = 0\u201339%
Worked Example
Scenario
A student scored 72% on a final exam. What grade is this under different systems?
- Standard US: C (70\u201379%)
- US with +/-: C (70\u201372% = C, not C+ which starts at 77%)
- UK GCSE: 7 (70\u201379% range)
- Cambridge IGCSE: B (70\u201379%)
- ZIMSEC O-Level: A (75%+ needed, so 72% = B, 65\u201374%)
- ZIMSEC A-Level: B (70\u201379%)
This example shows why it\u2019s so important to use the correct grading scale for your specific context.
Interpreting Your Results
The converter shows the corresponding grade for your percentage on the selected scale, along with the full grade table for that scale. Your result is highlighted in the table. Remember that these are approximations \u2014 actual grade boundaries can vary between institutions, exam sessions, and specific courses.
Frequently Asked Questions
Which scale should I use?
Select the scale that matches your educational system. If you\u2019re a student in the US, use Standard US. If you\u2019re studying Cambridge International, use the Cambridge IGCSE or UK A-Level scales. ZIMSEC students should use the ZIMSEC scales.
Are these boundaries official?
These boundaries represent common standards used by many institutions, but they are approximations. Grade boundaries can change between exam sessions and vary by institution. Always verify your grade with your school\u2019s official policy.
Can I use this for university applications?
Use this for reference and planning. When applying to universities, always use the grade conversion systems specified by the university or application service (such as UCAS in the UK).
Related Tools
- Grade Calculator — calculate your overall course grade
- Cambridge Grade-to-PUM Range Converter — Cambridge PUM ranges
- Test Score Calculator — convert raw scores to percentages
- Education Calculators — all education tools in one place