Percentage to Letter Grade Converter
Convert percentage grades to letter grades (A-F) bidirectionally using standard US grading scale
Bidirectional Converter
% to Letter
Grade to %
What is Letter Grading?
Letter grades (A-F) are standardized symbols representing academic performance levels. A is excellent (90-100%), B is good (80-89%), C is average (70-79%), D is below average (60-69%), F is failing (below 60%). Letter grades simplify percentage scores into understandable categories.
Plus/minus system (A+, A-, B+, etc.): Refines letter grades for more precise evaluation. A- is lower than A but higher than B+. This provides more nuanced assessment than basic A-F.
Standard US Grading Scale
A
90-100%
B
80-89%
C
70-79%
D
60-69%
F
Below 60%
Plus/Minus Refinement
A+: 95-100% (top tier) | A: 90-94% | A-: 87-89% | B+: 87-89% | B: 83-86% | B-: 80-82% (applies similarly for C, D ranges)
Conversion Reference Table
| Letter Grade | Range | Meaning |
|---|---|---|
| A+ / A / A- | 95-100% / 90-94% / 87-89% | Excellent |
| B+ / B / B- | 87-89% / 83-86% / 80-82% | Good |
| C+ / C / C- | 77-79% / 73-76% / 70-72% | Average |
| D+ / D / D- | 67-69% / 63-66% / 60-62% | Below Average (Pass) |
| F | Below 60% | Fail |
How This Converter Works
- Select Conversion Type: Choose percentage-to-letter or letter-to-percentage.
- Enter Grade Value: Input percentage (0-100) or select letter grade.
- Apply Grading Scale: Matches value to standard US scale ranges.
- Calculate Equivalent: Determines corresponding letter grade or range.
- Display Result: Shows converted grade with performance interpretation.
Reference Conversion: Uses standard US 90-80-70-60 scale, widely accepted across American schools and universities.
Uses & Applications
Academic Records: Converting between percentage and letter grades for transcripts, report cards, and academic records.
University Applications: Some universities require letter grades, others use percentages. Convert for standardized application materials.
GPA Calculation: Letter grades convert to points (A=4.0, B=3.0, etc.) for GPA calculation.
How to Use This Converter
Convert Percentage to Letter:
Enter percentage (0-100%) → Click "Convert to Grade" → See letter grade and interpretation.
Convert Letter Grade to Percentage:
Select letter grade (A-F) → Click "Convert to %" → See percentage range and meaning.
Supports Plus/Minus Grades:
Select A+, A-, B+, B-, C+, C-, D+, D-, D- for refined conversion.
Frequently Asked Questions
What's the difference between A and A+?
A+ is 95-100% (top tier), A is 90-94%. A+ is slightly higher recognition, though both are excellent.
Is 80% passing?
Yes, 80% is B- or B range (passing). Typically 60% is minimum pass (D range). Below 60% is F (fail).
Can scales differ between schools?
Yes, some schools use different cutoffs. This uses standard 90-80-70-60 scale. Verify your school's specific scale.
How do I calculate my class grade?
Average all assignment/test percentages, then convert to letter grade for final grade.
Do colleges look at letter grades or percentages?
US colleges primarily use GPA (4.0 scale). Both letter grades and percentages feed into GPA calculation.
What does weighted grade mean?
Weighted grade combines multiple grades by importance. Example: tests 40%, homework 30%, projects 30%.
Is 3.0 GPA good?
3.0 GPA = B average (80%). Generally acceptable; 3.5+ is considered good for most schools.
What's a standard school grading scale?
Most US schools use 90-80-70-60: A=90-100%, B=80-89%, C=70-79%, D=60-69%, F=below 60%.
Can I round 89.5% to A?
89.5% is typically B+ (87-89% range). Some teachers round to 90% and A, but depends on rounding policy.
Official Standards & References
- US Department of Education - Grading standards and practices
- American Educational Research Association (AERA) - Academic assessment standards
About the Author
This converter was developed by Adam, an educational technology specialist helping students understand grading systems worldwide.
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