Ever wondered whether an 87% counts as a B+ or an A-? Since schools and universities don’t all follow the same grading rules, turning a percent to grade can be confusing. A percentage to letter grade calculator removes the guesswork, and a reliable percentage to letter grade converter gives you the answer in seconds. The best free grade converter offers instant grade conversion with no sign-ups or complicated formulas.
Whether you’re a student, teacher, or parent, an online grade calculator keeps things simple: just enter your score and see the matching letter. It works for any score to letter grade lookup, and a marks to grade converter is especially handy when your results come as raw marks instead of percentages.
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How to Convert Percentage to Letter Grade (Formula and Steps)
Wondering how to convert percentage to letter grade? The process is simple once you know the percentage formula: (points earned ÷ points possible) × 100. Here is the step-by-step conversion.
Step 1: Find your points earned and points possible.
Points earned is the score you received. Points possible is the maximum score available, also called the total points.
Step 2: Divide.
Use points earned divided by total points to get a decimal. For example, 42 ÷ 50 = 0.84.
Step 3: Multiply by 100.
Next, multiply by 100 to turn the decimal into a percentage. So 0.84 × 100 = 84%.
Step 4: Round if your school requires it.
Many teachers round to the nearest whole number, so 86.67% becomes 87%. Check your school’s rounding policy first.
Step 5: Match the percentage to the scale.
Finally, match percentage to scale using the chart above. An 84% falls in the 83-86% range, which is a B.
Grade calculation example: You score 42 out of 50. Divide 42 by 50 to get 0.84, multiply by 100 to get 84%, and the chart gives you a B.
Here are more examples using the same formula:
| Score | Calculation | Percentage | Letter Grade |
|---|---|---|---|
| 42 out of 50 | 42 ÷ 50 × 100 | 84% | B |
| 78 out of 90 | 78 ÷ 90 × 100 | 86.67% (87% rounded) | B+ |
| 67 out of 80 | 67 ÷ 80 × 100 | 83.75% (84% rounded) | B |
| 17 out of 20 | 17 ÷ 20 × 100 | 85% | B |
| 8.5 out of 10 | 8.5 ÷ 10 × 100 | 85% | B |
| 340 out of 400 | 340 ÷ 400 × 100 | 85% | B |
Notice that 78 out of 90 lands on a B+ only after rounding. Without rounding, 86.67% would stay a B.
Percentage to Letter Grade Chart
A percentage to letter grade chart is the quickest way to see where your score lands. Also called a letter grade percentage chart, it follows the standard US grading scale, where US letter grades run from A to F in an A-F grading chart. Most schools use the plus minus grading system, which splits each letter into A+, A, A-, B+, B, B-, C+, C, C-, D+, D, D-, F. Each letter has its own grade ranges, and the grade thresholds show the minimum percentage you need to earn it.
| Letter Grade | Percentage Range | 4.0 Scale |
|---|---|---|
| A+ | 97-100% | 4.0 |
| A | 93-96% | 4.0 |
| A- | 90-92% | 3.7 |
| B+ | 87-89% | 3.3 |
| B | 83-86% | 3.0 |
| B- | 80-82% | 2.7 |
| C+ | 77-79% | 2.3 |
| C | 73-76% | 2.0 |
| C- | 70-72% | 1.7 |
| D+ | 67-69% | 1.3 |
| D | 65-66% | 1.0 |
| D- | 60-62% | 0.7 |
| F | below 60% | 0.0 |
This quick lookup chart also shows each grade’s value on the unweighted 4.0 scale, which is how many schools calculate GPA. Keep in mind that grade boundaries and grade cutoffs vary by institution. Most schools mark anything below 60% as an F, but some set the failing line at below 65%, so check your school’s policy before relying on any chart.
Rounding Rules and Decimal Percentages
Scores don’t always land on whole numbers, so decimal percentages can decide your letter. The usual rounding rule is to round to nearest whole percent, which is why 89.5% rounds up to 90%. Your raw percentage is the exact result, but check your instructor rounding policy or syllabus policy, since not every teacher rounds. A rounding toggle in an online calculator shows both results, which helps with decimal scores and any borderline grade.
| Decimal Percentage | Rounded | Letter Grade |
|---|---|---|
| 93.33% | 93% | A |
| 91.67% | 92% | A- |
| 88.89% | 89% | B+ |
| 87.5% | 88% | B+ |
| 86.67% | 87% | B+ |
| 85.71% | 86% | B |
| 83.33% | 83% | B |
| 81.25% | 81% | B- |
| 78.57% | 79% | C+ |
| 77.78% | 78% | C+ |
| 76.92% | 77% | C+ |
| 75% | 75% | C |
| 73.33% | 73% | C |
| 71.43% | 71% | C- |
| 68.75% | 69% | D+ |
| 66.67% | 67% | D+ |
| 63.64% | 64% | D (if range is 63-66%) |
| 58.33% | 58% | F |
| 57.14% | 57% | F |
Visit this also: Grade Calculator with Extra Credit, Weighted and GPA
What Each Letter Grade Means (Descriptions and Performance Levels)
Knowing what each letter grade means helps you see beyond the number. Each letter reflects a performance level, and the plus or minus shows where you sit within it.
A (excellent): An A excellent result shows outstanding, exceptional work and strong mastery of the material. An A+ marks the very top of this range.
B (good): A B good grade means very good work with a solid grasp of the subject. A B+ is nearly an A-, while a B- is still above average.
C (average): A C average grade shows you met the basic requirements. A C+ is slightly above average, while a C- sits at the lower edge of satisfactory.
D (below average): A D below average grade shows only partial understanding. It usually earns credit, but it may not meet prerequisite or major requirements.
F (failing): An F failing grade means the minimum standards weren’t met, and the course usually has to be retaken.
| Letter | Meaning | Performance Level |
|---|---|---|
| A | Excellent | Outstanding, exceptional |
| B | Good | Very good, above average |
| C | Average | Satisfactory, slightly above average at C+ |
| D | Below average | Limited understanding |
| F | Failing | Standards not met |
Grading Scale by Education Level (Middle School, High School, College)
The same percentage to letter grade can mean different things as students move up through school.
- Middle school: Middle school grading is usually a simple A-F scale without plus or minus. A typical letter grade chart for middle school is A (90-100%), B (80-89%), C (70-79%), D (60-69%), and F (below 60%).
- High school: A letter grade chart for high school often adds pluses and minuses and feeds your high school GPA, sometimes with extra weight for honors or AP classes.
- College: A letter grade chart for college is set by each professor or department. University grading often uses plus-minus, and your results build your college GPA. Some schools follow D- not used rules, so a D is the lowest passing mark.
- Graduate school: Graduate program grading is stricter, and many programs treat C minimum passing.
Pass/fail courses show only a pass or fail on your transcript, so they usually don’t affect your GPA.
FAQs About Percentage to Letter Grade
How do I convert a percentage to a letter grade?
Divide your points earned by the total points possible, multiply by 100, and match the result to your school’s grading scale. For example, 42 out of 50 is 84%, which is a B on the standard US scale.
What percentage is an A, B, C, D, and F?
On the standard US scale, an A is 90-100%, a B is 80-89%, a C is 70-79%, a D is 60-69%, and an F is below 60%. Schools that use plus and minus grades split each letter into smaller ranges, such as B+ (87-89%) and B- (80-82%).
What is 85% as a letter grade?
An 85% is a B on the standard US grading scale. It falls in the 83-86% range, which is a straight B, and it equals 3.0 on the unweighted 4.0 scale.
Do teachers round percentages to the next letter grade?
It depends on the teacher. Many round to the nearest whole percent, so 89.5% becomes 90% and moves from a B+ to an A-. Others use the raw percentage with no rounding, so always check your syllabus or instructor rounding policy.
Is the grading scale the same in every school and country?
No. Cutoffs vary by school, college, and professor, and some schools don’t use plus or minus grades. Other countries use completely different systems, such as France’s 20-point scale. For international applications, credential evaluators can provide an official grade equivalent.
Conclusion
Turning a percentage to letter grade is simple once you know the formula, the chart, and your school’s rounding policy. Just remember that grading systems change by country. Canada grading varies by provincial grading rules, a French grading out of 20 treats 14 or 15 as a strong result, and a European 10-point scale works very differently from the US A-F system.
If you’re applying abroad, international grade conversion gets tricky. Tasks like GPA to ECTS or US GPA to UK degree conversions rarely follow a single formula, so credential evaluators are often the safest way to get an official equivalent.
